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Journal articles on the topic 'Oil well drilling'
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1
Della Nave, Esteban, and Eduardo Natalio Dvorkin. "On the modeling of oil well drilling processes." Engineering Computations 32, no. 2 (April 20, 2015): 387–405. http://dx.doi.org/10.1108/ec-03-2013-0093.
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Purpose – The purpose of this paper is to present the development of a simulator of oil well drilling processes. Design/methodology/approach – The simulator incorporates the main variables that are used by drilling engineers in the definition of the drilling processes. The code is useful a priori, in the design of a drilling process, as a tool for comparing different design options and predicting their results and a posteriori of a failure to understand its genesis and therefore provide know-why to improve the drilling techniques. Findings – The developed finite element simulator uses a co-rotational Bernoulli beam element, an explicit time integration scheme and an explicit contact algorithm. The numerical results show that the simulator is stable and provides consistent solutions. Practical implications – During the drilling of oil wells, the fatigue damage and wear of the drilling column is of utmost concern. To determine the mechanical behavior of the drilling column standard simplified analyses are usually performed using commercially available codes; however, those standard analyses do not include a transient dynamic simulation of the process; hence, it is necessary to develop a specific tool for the detailed dynamic simulation of drilling processes. Originality/value – A simulator able to perform a description of the drilling process in the time range will be an important contribution to the tools used by drilling engineers.
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Ovchinnikov, P. V., and A. S. Syrchina. "Optimization methods for well designs, drilling and well completion technologies." Proceedings of higher educational establishments. Geology and Exploration, no. 5 (December 13, 2023): 22–32. http://dx.doi.org/10.32454/0016-7762-2023-65-5-22-32.
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Background. The task of increasing the efficiency of well construction, reducing the labor- and financial costs involved, and achieving the maximum operational characteristics of oil and gas wells requires the application of the most recent technologies and technological solutions for well drilling and well completion.Aim. Review and analysis of the implementation and development of promising technologies for well drilling and well completion in the Russian Federation to identify those capable of optimizing well designs, improving the efficiency of technological processes for drilling and completion of exploration and production wells.Materials and methods. An analysis of accumulated experience, generalization of the results of implementation of modern solutions and technologies for drilling and completion of wells by oil- and gas-producing enterprises of the Russian Federation.Results. The relevant tasks and directions for improving drilling and well completion technologies and using state-of-the-art equipment are outlined. These solutions can contribute to increasing the efficiency of well construction, reducing the drilling duration of oil and gas wells, and ensuring technological sovereignty.Conclusion. The considered directions and technologies, as well as their composite tasks and methodological, engineering, and software implementation aspects, can become a subject for research, project, and engineering works, as well as for final qualifying works of students and dissertations.
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Carpenter, Chris. "Expertise in Complex-Well Construction Leveraged for Geothermal Wells." Journal of Petroleum Technology 75, no. 05 (May 1, 2023): 87–89. http://dx.doi.org/10.2118/0523-0087-jpt.
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_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 204097, “Constructing Deep Closed-Loop Geothermal Wells for Globally Scalable Energy Production by Leveraging Oil and Gas Extended-Reach Drilling and High-Pressure/High-Temperature Well-Construction Expertise,” by Eric van Oort, SPE, Dongmei Chen, SPE, and Pradeepkumar Ashok, SPE, The University of Texas at Austin, et al. The paper has not been peer reviewed. _ In the complete paper, deep closed-loop geothermal systems (DCLGS) are introduced as an alternative to traditional enhanced geothermal systems (EGS) for green energy production that is globally scalable and dispatchable. The authors demonstrate that DCLGS wells can generate power on a scale comparable to that of EGS. They also highlight technology gaps and needs that still exist for economically drilling DCLGS wells, writing that it is possible to extend oil and gas technology, expertise, and experience in extended-reach drilling (ERD) and high-pressure/high-temperature (HP/HT) drilling to construct complex DCLGS wells. Introduction CLGS is considered a subset of EGS, but the authors write that it is a distinct entity. EGS mostly involves well designs that rely on fractures for heat extraction. Such systems are different from CLGS wells in that the latter use closed conduits for thermal fluid circulation and heating. CLGS relies on fluids pumped through a closed loop. The authors treat CLGS systems as being different from EGS systems, with the understanding that drilling technologies discussed in the paper as enablers for CLGS wells apply equally to EGS wells. In the geothermal (GT) domain, the majority of attention and funding currently is assigned to EGS projects. A case is made in the complete paper to continue to develop DCLGS technology because of its favorable risk profile compared with EGS. Part I of the complete paper introduces a hydraulic model coupled with a thermal model suitable for calculating the power generation of DCLGS wells. This synopsis concentrates instead on Part II of the complete paper, in which technology gaps and needs of DCLGS drilling and well construction are highlighted and opportunities identified where oil and gas experience and technology can be directly applied and leveraged. Similarities and Differences of Deep GT and Oil and Gas HP/HT Wells - GT wells generally use larger production hole sizes than typical land wells. - Casing-cement annuli typically are cemented back to surface. - GT wells can be drilled in more-forgiving pore-pressure fracture gradient (PPFG) environments with wider drilling margins than geopressured HP/HT wells in hydrocarbon systems. - Severe lost circulation appears to be a universal problem in deep GT wells. - Drilling costs can account for 50% or more of the total capital costs for a GT energy project. - Data sets on GT wells are much smaller than those for oil and gas wells.
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ON, Shemelina. "Constructing a Heavy Oil Well." Petroleum & Petrochemical Engineering Journal 6, no. 1 (2022): 1–6. http://dx.doi.org/10.23880/ppej-16000300.
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The article presents a description of the designs of wells intended for the production of high-viscosity oil. The main problems associated with the planning and deployments of architecture, construction of high-viscosity oil wells are described. World experience in well construction is presented. Vertical wells are usually used for primary cold production and cyclic steam or steam flooding processes. On the other hand, increased reservoir contact may require deviated, horizontal, or multilateral wells. In the case of steam-assisted gravity drainage (SAGD) and some solvent injection processes, the recovery process may require a well-placed pair of horizontal wells. Advanced drilling and real-time measurement technologies reviewed. Geo mechanical factors are studied when considering the implementation of any steam or thermal processes in the field. Examples of construction of multilateral wells in various combinations are shown depending on the field development strategy and for maximum reservoir drainage. The main recommendations for the placement of wells are proposed.
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Deryaev, A. R. "Well trajectory management and monitoring station position borehole." SOCAR Proceedings, SI2 (December 31, 2023): 1–6. http://dx.doi.org/10.5510/ogp2023si200870.
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The article analyzes the selection and recommendations, as well as instructions for drilling deep directional and horizontal wells, electric drilling methods in the Western part of the oil and gas fields of Turkmenistan in order to increase oil and gas production from productive layers of the horizons of the red-colored strata. To analyze the choice of drilling deep directional and horizontal wells, materials of previously operated wells, geological and operational characteristics of deposits and the guidance document «Operating Instructions for oil and gas wells», as well as safety rules in the oil and gas industry were used. This paper provides a detailed analysis of the complexity of drilling deep directional and horizontal oil and gas wells and their specific causes, as well as recommendations for the selection of design profiles and operating instructions for different types of deflectors, as well as telemetry systems. Such work will be useful and can be used to fulfill the tasks set when drilling wells, as well as to increase the production of oil and gas wells and to develop fields with complex geological characteristics. Keywords: profile; deflections; borehole curvature; trajectory; rotor; layout; telesystem; conductor; inclinometer; deflector; azimuth.
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Fan, Sen, Yue Xiang Li, Jin Qiang Cao, and Jian Bo Xie. "Optimization Technique in Double Stepped Thin Horizontal Well." Advanced Materials Research 734-737 (August 2013): 1226–29. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.1226.
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Oil industry at home and abroad has paid attention to the usage of horizontal well with the development of horizontal drilling technology, the number of horizontal well is increasing year by year inland, but some horizontal well constructions in thin oil pay is not ideal. Nanzhong 1H well has used double stepped horizontal well technology to develop thin oil pay, it has optimized the constructions in different stages and combined the steering technique in the drilling practice of thin oil pay, it has accelerated the drilling speed and reached the target fast and safely. It provides the reference for the further development of deep thin oil pay of horizontal well technology.
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Deryaev, Annaguly. "Engineering aspects and improvement of well drilling technologies at the Altyguyi field." Naukovij žurnal «Tehnìka ta energetika» 15, no. 2 (April 30, 2024): 9–20. http://dx.doi.org/10.31548/machinery/2.2024.09.
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The relevance of the research is justified by the rapid development of the oil industry, which requires constant improvement of methods and equipment to increase extraction efficiency and reduce environmental impact. The aim of this study is to enhance the current engineering aspects of drilling in the Altyguyi field while considering increased productivity and reduced environmental impact. Among the methods used, it is necessary to mention the synthesis method, abstraction method, generalization method, induction method, deduction method, classification method, and others. This study examines the technological aspects of operating wells in the Altyguyi gas-condensate field. Extensive laboratory and industrial research on the properties and composition of oil, gas, and condensate was conducted to properly implement the dual completion technology for gas extraction from one formation and oil extraction from another formation in a single well. By implementing advanced drilling methods, including horizontal and multi-hole drilling, as well as using modern drilling fluids, it was possible to improve well productivity and reduce drilling time. As a result of technology optimization, the overall efficiency of the oil and gas extraction process in the field has been increased, confirming the significance of innovation implementation for improving results in the oil industry. These enhancements not only increased drilling safety and efficiency, but also reduced the negative impact on the environment, emphasizing the importance of integrating modern technologies with environmental considerations in the oil extraction process. This research makes a significant contribution to the development of more efficient and environmentally sustainable drilling methods in oil fields, contributing to increased oil extraction productivity and reduced environmental impact
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Dotsenko, V. A. "Assembly of PND oil-well drilling equipment." Chemical and Petroleum Engineering 32, no. 6 (November 1996): 559–62. http://dx.doi.org/10.1007/bf02416677.
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Gaurina-Međimurec, Nediljka, Borivoje Pašić, and Petar Mijić. "Risk Planning and Mitigation in Oil Well Fields." International Journal of Risk and Contingency Management 4, no. 4 (October 2015): 27–48. http://dx.doi.org/10.4018/ijrcm.2015100103.
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Lost circulation presents one of the major risks associated with drilling. The complete prevention of lost circulation is impossible but limiting circulation loss is possible if certain precautions are taken. Industry experience has proved that is often easier and more effective to prevent the occurrence of loss than to attempt to stop or reduce them once they have started. The problem of lost circulation was magnified considerably when operators began drilling deeper and/or depleted formations. A strategy for successful management of lost circulation should include preventative (best drilling practices, drilling fluid selection, and wellbore strengthening materials) and remedial measures when lost circulation occurs through the use of lost circulation materials. In this paper the authors present lost circulation zones and causes, potential zones of lost circulation, excessive downhole pressures causes, preventive measures, tools and methods for locating loss zones and determining the severity of loss, lost circulation materials, and recommended treatments.
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Abd Alhaleem, Ayad, Safaa Husain Sahi, and Amel Habeeb Assi. "Bit Performance in Directional Oil Wells." Journal of Engineering 21, no. 11 (November 1, 2015): 80–93. http://dx.doi.org/10.31026/j.eng.2015.11.05.
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This work aims to analyze and study the bit performance in directional oil wells which leads to get experience about the drilled area by monitoring bit performance and analyzing its work. This study is concerned with Rumaila Oil Field by studying directional hole of one oil well with different angles of inclination. Drilling program was used in order to compare with used parameters (WOB, RPM and FR).in those holes. The effect of the drilling hydraulic system on the bit performance was studied as well as the hydraulic calculation can be done by using Excel program. This study suggests method which is used to predict the value of penetration rate by studying different formation type to choose the best drilling parameters to drill each formation. Finally, the main aim of this research is to have the benefit from the past well drilling data to drill new wells without needing new drilling program for each well, also knowing the problems of each formation to avoid them as soon as possible through drilling the new wells, which will improve the bit performance.
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Dmitrievsky, A. N., N. A. Eremin, A. D. Chernikov, and S. О. Borozdin. "Intelligent Complication Prevention Systems for Safe Well Construction." Occupational Safety in Industry, no. 6 (June 2022): 7–13. http://dx.doi.org/10.24000/0409-2961-2022-6-7-13.
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The results of many years of research on the prevention of complications in the construction of oil and gas wells using machine learning methods are presented in the article. The issues of creating prototypes of intelligent systems to prevent complications when drilling wells on land and offshore are considered. The purpose of the intelligent systems to prevent complications during well drilling is to warn the driller in advance about the possibility of a violation of the regular drilling regime. Intelligent systems for preventing complications during well construction help to increase the economic efficiency of drilling oil and gas wells. Large volumes of geodata from the stations of geological and technological measurements during drilling vary from units to hundreds of terabytes. Creation of the neural network modeling software components is aimed at revealing hidden and non-obvious patterns in the datasets, i.e. in the processed, labeled and structured information from the stations of geological and technological measurements in the tabular form. Hierarchical distributed data warehouse was formed containing real-time drilling data in WITSML format using a SQL server (Microsoft). The geodata preprocessing and loading module for the WITSML repository uses the Energistics Standards DevKit API and Energistic data objects to work with the geodata in the WITSML format. The accuracy of predicting drilling problems achieved with the help of the developed intelligent systems can significantly reduce unproductive time spent on eliminating stuck pipes, mud losses and gas, oil and water shows. Large-scale implementation of the intelligent systems to prevent complications in well drilling will ensure the achievement of a zero-carbon footprint in the environmentally friendly drilling of wells on the land and offshore.
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Сарқұлова, Ж. С., А. С. Куанышева, Н. Б. Қаржаубай, and А. Т. Қазыбек. "Innovations in drilling and modern well cleaning technologies." Горный журнал Казахстана, no. 11(223) (December 6, 2023): 47–51. http://dx.doi.org/10.48498/minmag.2023.223.11.004.
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«Ұңғымаларды Бұрғылаудағы инновациялар және мұнайды тазарту технологиялары: Тұрақты энергияға жол» мақаласы мұнай-газ өнеркәсібінде мұнай мен газ өндірудің тиімділігін арттыру, сондай-ақ қоршаған ортаға әсерді азайту үшін қолданылатын заманауи әдістер мен технологияларды зерттейді. Мақалада көлденең бұрғылау, көп ұңғыма платформалары, бұрғылау машиналарын Автоматтандыру және IT технологияларын пайдалану сияқты инновациялар қарастырылады. Ұңғымаларды бұрғылау мен мұнайды өңдеудің заманауи тенденцияларына шолу жасалады, олардың тұрақты энергияға жету жолындағы маңыздылығын көрсетеді. Мақала сонымен қатар Мақала әдебиеттерді шолуға және ұңғымаларды бұрғылау, мұнай тазарту технологиялары және мұнай-газ саласындағы инновациялар саласындағы заманауи басылымдар мен зерттеулерді талдауға негізделген The article «Innovations in well drilling and oil refining Technologies: the path to sustainable energy» explores modern methods and technologies used in the oil and gas industry to improve the efficiency of oil and gas production, as well as reduce environmental impact. The article discusses such innovations as horizontal drilling, multithreaded platforms, automation of drilling machines and the use of IT technologies. An overview of current trends in well drilling and oil refining is given, demonstrating their importance on the way to achieving sustainable energy. The article is also based on a literature review and analysis of modern publications and research in the field of well drilling, oil purification technologies and innovations in the oil and gas industry В статье «Инновации в бурении скважин и технологии очистки нефти: путь к устойчивой энергии» исследуются современные методы и тех- нологии, используемые в нефтегазовой промышленности для повышения эффективности добычи нефти и газа, а также снижения воздействия на окружающую среду. В статье рассматриваются такие инновации, как горизонтальное бурение, многопоточные платформы, автоматизация буровых машин и использование ИТ-технологий. Дается обзор современных тенденций бурения скважин и переработки нефти, демонстрирующих их важность на пути к достижению устойчивой энергии. Статья также основана на обзоре литературы и анализе современных публикаций и исследований в области бурения скважин, технологий очистки нефти и инноваций в нефтегазовой отрасли
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Yang, Guangyao. "Research on well selection and layer selection methods for tapping the remaining oil at the top of thick oil layers using ultra-short radius lateral drilling horizontal wells." E3S Web of Conferences 352 (2022): 01050. http://dx.doi.org/10.1051/e3sconf/202235201050.
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The flexible drilling method of ultra-short radius sidetrack horizontal wells is an effective method to utilize the remaining oil at the top of thick oil reservoirs. By analyzing the current status of the SZ oilfield well network, development stage and sand body development characteristics, combined with the characteristics of ultra-short radius lateral drilling horizontal well technology, the areas and formations suitable for ultra-short radius lateral drilling horizontal well tapping are identified, and the criteria for selecting wells and formations for ultra-short radius lateral drilling horizontal wells are established, which is a guide for the application of this technology.
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Mahammad Shirinov, Mahammad Shirinov, Sabir Gurbanov Sabir Gurbanov, and Ramil Zamanlı Ramil Zamanlı. "A COMPREHENSİVE APPROACH TO THE COMPLETİON OF HORİZONTAL AND MULTİLATERAL WELLS." PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 25, no. 02 (February 20, 2023): 103–11. http://dx.doi.org/10.36962/pahtei25022023-103.
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At the heart of any new technology is the desire to reduce the cost of each produced barrel of oil equivalent. New potential opportunities for a significant improvement in the economics of drilling are opened up by the Multilateral Well Drilling Technology. More recently, through the joint efforts of design, development and implementation groups of service companies and operators, multilateral drilling technology has become a new cost-effective method of well completion.In this section of Multilateral Drilling Technologies, we would like to demonstrate how, with the introduction of advanced innovative technologies, the multilateral drilling systems developed by Halliburton have become suitable for the urgent needs of the oil and oil industry. Keywords: Multilateral Well, Well Completions, Open Hole Sidetracks, drilling system, drilling technology.
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Zhang, Hui, De Li Gao, and Wen Sheng Liu. "Risk Assessment of Extended Reach Well Based on Gray Matter-Element." Advanced Materials Research 361-363 (October 2011): 386–92. http://dx.doi.org/10.4028/www.scientific.net/amr.361-363.386.
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Drilling is one of the major means for oil and gas exploration and development. Extended reach wells (ERWs) are defined as directional wells or horizontal wells with horizontal displacement (HD) to vertical depth (VD) ratio greater than or equal to 2. Extended reach drilling (ERD) confronted many technical difficulties. Risk analysis of ERD before drilling is of great significance for preventing complex accidents during drilling operations, improving the drilling rate and efficiency. Based on gray matter-element theory, this paper established a comprehensive risk assessment model for ERD operations and applied this model to evaluate the drilling risk of Well B6ERW07(HD to VD ratio 5.94, horizontal displacement 7,419.42 m, vertical depth 1,248.50 m, measured depth 8,144.31 m)in the Liuhua oil field, South China Sea. The assessment results show that the predicted success rate of drilling this ERW is 49.9%. This result can be important criteria and thus contributes greatly to decision making.
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Oladiran Kayode Olajiga, Nwankwo Constance Obiuto, Riliwan Adekola Adebayo, and Igberaese Clinton Festus-Ikhuoria. "SMART DRILLING TECHNOLOGIES: HARNESSING AI FOR PRECISION AND SAFETY IN OIL AND GAS WELL CONSTRUCTION." Engineering Science & Technology Journal 5, no. 4 (April 10, 2024): 1214–30. http://dx.doi.org/10.51594/estj.v5i4.1013.
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This paper explores the integration of AI in smart drilling technologies, examining its applications, benefits, challenges, and future prospects. By harnessing the power of AI, smart drilling technologies enable proactive decision-making, automation, and optimization throughout the drilling lifecycle. From well planning and design to real-time monitoring and control, AI-driven systems improve operational performance, reduce risks, and maximize resource recovery. Despite facing challenges such as data integration, technology adoption, and regulatory compliance, the potential benefits of smart drilling technologies are substantial. Enhanced precision, improved safety, increased efficiency, and sustainable practices are among the key benefits offered by these technologies. Looking towards the future, opportunities for further innovation and advancement abound, including the development of advanced AI algorithms, integration with IoT and big data analytics, and a focus on environmental sustainability. By embracing innovation, collaboration, and a commitment to sustainability, the oil and gas industry can unlock new opportunities for growth and resilience in the evolving landscape of oil and gas well construction. Smart drilling technologies hold the promise of reshaping the future of well construction, paving the way for safer, more efficient, and sustainable drilling operations in the oil and gas industry. Smart drilling technologies are revolutionizing the oil and gas industry, offering unprecedented levels of precision and safety in well construction. By integrating artificial intelligence (AI) into drilling processes, these technologies optimize drilling parameters, reduce risks, and maximize resource recovery.. Enhanced precision, improved safety, increased efficiency, and sustainable practices are among the key benefits offered by these technologies. Looking towards the future, opportunities for further innovation and advancement abound, including the development of advanced AI algorithms, integration with IoT and big data analytics, and a focus on environmental sustainability.
Keywords: Smart drilling, Artificial intelligence (AI), Oil and gas industry Efficiency, Safety, Sustainability.
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Sultanova, Arzu V., and Ramil M. Mammadov. "About impact of clogging phenomena on well productivity." Nafta-Gaz 79, no. 1 (January 2023): 20–27. http://dx.doi.org/10.18668/ng.2023.01.03.
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"During the opening of a productive formation by drilling, penetration of clay particles from the drilling fluid into the leading filtration channels of the rock occurs. As a rule, productive formations are opened at pressures that are significantly higher than the formation pressure. The amount of hydrostatic repression depends on the density of the drilling fluid, the height of the liquid column, and the reservoir pressure. A classic example of the latter is the problem of studying changes in reservoir properties that occur at the drilling stage, where relatively small particles of drilling fluid penetrate along with the flow into the pore space. A decrease in the bottomhole zone permeability in oil wells leads to a significant decrease in oil production rates, and sometimes to their complete stop, which ultimately significantly affects the total oil recovery and economic indicators of the oil fields’ development. The decrease in permeability can be caused by many factors: – clogging of the bottomhole zone of the productive formation in the process of drilling a well; – formation of a crust in perforated channels during cumulative perforation; – colmatation of the bottomhole zone of the productive formation during the operation of the well; – clogging of perforated channels during well killing and subsequent clogging; – formation of deposits of paraffins and asphaltenes in the pores of the rock of the bottomhole zone of the well. Bottomhole zone damage (clogging) significantly affects the productivity of wells, and the permeability of the formation, determined by the results of hydrodynamic studies. At the same time, clogging is understood as damage of the bottomhole zone with drilling fluid when opening the productive formation, and deterioration of the properties of the bottomhole zone during cementing, perforation of the productive interval, swelling of clays, etc. This paper presents an analysis of laboratory and field studies of the influence of clogging on the productivity of wells when opening layers with different capacitive and filtration properties, and also provides an analytical estimation of this effect, both for vertical and horizontal wells."
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Aksenova, Natalya. "Experience of the silicate reagents in oil and gas well drilling use." E3S Web of Conferences 515 (2024): 01005. http://dx.doi.org/10.1051/e3sconf/202451501005.
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The article presents the analysis of incidents occurred while production drilling and side track drilling at the Samotlor field during the period from 2012 to 2023 and the relevance sticking problem occurrence with amount to more than 40%. The reason for the sticking in 90% of cases is the discrepancy between the drilling mud properties and the drilling well geological and technical condition. To prevent sticking the authors propose the boron-silicate solution (BSS) and its analogues use in the composition of drilling washing liquids. The BSS in well drilling high efficiency use is shown. Due to the combination of high inhibitory properties, low fluid loss and reinforcing properties at the same time the reagent allows to drill a well without complications, preserving the productive formation reservoir properties and the well cementing quality improving.
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Rafiq Ibrahimov, Leyla Afandiyeva, Rafiq Ibrahimov, Leyla Afandiyeva, and Iqrar Safixanov Iqrar Safixanov. "CONTROL OF ANNULAR MANIFESTATIONS AFTER CASING CEMENTING AND DURING WELL OPERATION." PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 28, no. 05 (April 14, 2023): 24–30. http://dx.doi.org/10.36962/pahtei28052023-24.
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The article shows that small craters are formed on the territory of mud volcanoes, through which a gaseous agent, and in some cases oil-contaminated agent, comes to the surface. The formation of the griffin in the Azerbaijan oil industry took place in the initial period of the development of Gala, Garachukhur, Puta, Lokbatan and other areas. At present, griffin formation occurs when drilling wells in the oil fields Dashlari, Kum-Deniz, Mishovdag and Kurovdag. It can be found in other areas as well. The most likely main causes of griffon formation are gas flows that occur after casing cementing or during well operation, and during drilling - mud gasification. Keywords: griffin, well drilling, wellhead, clay solution, tectonic faults, wellbore.
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Alkalbani, Alhaitham M., and Girma T. Chala. "A Comprehensive Review of Nanotechnology Applications in Oil and Gas Well Drilling Operations." Energies 17, no. 4 (February 7, 2024): 798. http://dx.doi.org/10.3390/en17040798.
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The field of nanotechnology has shown promise in addressing major problems and improving drilling effectiveness. An overview of the difficulties encountered during oil and gas well drilling operations and the demand for creative solutions opens the debate. This review explores how nanotechnology is transforming the oil industry and enhancing performance as a whole. The evaluation of the uses of nanotechnology for better oil recovery, real-time monitoring, innovative materials, drilling fluids, and reservoir characterization are extensively discussed in this review. The primary function of additives is to improve the fundamental characteristics of drilling fluids. The variety of fluid additives available is a reflection of the complex drilling–fluid systems that are currently being used to enable drilling in increasingly difficult subsurface conditions. Common additives used in water- and oil-based drilling fluids include lubrication, shale stability, pH regulation, filtration control, rheology control, viscosification, and pH regulation. Drilling fluids frequently contain filtration control additives such as starch, polyanionic cellulose (PAC), carboxymethyl cellulose (CMC), and nanoparticles (NP). Commonly used rheology-modifier additives are xanthan gum, carboxymethyl cellulose, guar gum powder, and, more recently, salt-responsive zwitterionic polymers that were used as viscosifiers to water-based drilling fluids. The three main additives that regulate pH are citric acid monohydrate, potassium hydroxide, and sodium hydroxide. Additives that stabilize shale, such as potassium and sodium salts and asphaltenes, are often used. A wide range of materials are included in the category of lubricating additives, including polymers, asphaltenes, glass beads, oils of various grades, and oil-surfactants. Various fibrous materials, including wood, cotton, fibrous minerals, shredded tires from vehicles, and paper pulp, are used as additives to control circulation. Furthermore, shredded cellophane, bits of plastic laminate, plate-like minerals like mica flakes, granulated inert materials such as nut shells, and nano-polymers are used in wellbores to reduce fluid loss. The incorporation of nanoparticles into drilling fluids has produced upgraded fluids with better features, including improved lubricity, thermal stability, and filtering capacities. These developments aid in lowering friction, enhancing wellbore stability, and enhancing drilling efficiency. This paper also emphasizes how nanotechnology has made enhanced drilling equipment and materials possible. Drilling equipment’s longevity and performance are increased by nanocomposite materials that have been reinforced with nanoparticles due to their improved mechanical strength, wear resistance, and thermal stability. Advanced reservoir characterisation tools, including nanoparticle tracers and nanoscale imaging methods, can help locate the best drilling sites and increase production effectiveness. On the other hand, nanofluids and nanoemulsions can potentially increase oil recovery because they enhance fluid mobility, lower interfacial tension, and alter rock wettability. Although nanotechnology has many advantages, there are also issues that need to be resolved. For an implementation to be effective, factors including nanoparticle stability, dispersion, and potential environmental effects must be carefully taken into account. This review highlights the need for future research to create scalable manufacturing procedures, improve nanoparticle behaviour, and determine nanomaterials’ long-term environmental effects. In conclusion, this in-depth analysis illustrates the use of nanotechnology in transforming the process of drilling oil and gas wells.
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Santos, Nara Brandão Costa, Flávia Marques Fagundes, Fábio de Oliveira Arouca, and João Jorge Ribeiro Damasceno. "Sedimentation of solids in drilling fluids used in oil well drilling operations." Journal of Petroleum Science and Engineering 162 (March 2018): 137–42. http://dx.doi.org/10.1016/j.petrol.2017.12.026.
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Yan, Chuanliang, Jingen Deng, Baohua Yu, Lianbo Hu, Zijian Chen, Hai Lin, and Xiaorong Li. "Fracturing Pressure in Oil and Gas Well Drilling." Research Journal of Applied Sciences, Engineering and Technology 5, no. 19 (May 10, 2013): 4775–79. http://dx.doi.org/10.19026/rjaset.5.4318.
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Han, Guo You, Xi Sheng Zhang, and Xiu Hua Du. "The Application of BOP During Oil Well Drilling." Advanced Materials Research 1094 (March 2015): 419–22. http://dx.doi.org/10.4028/www.scientific.net/amr.1094.419.
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This is an introduction to brief application of blowout preventers and accessory equipment. Fluid (either liquid or gas) erupts from the well, usually with great force, and often ignites into a roaring inferno, especially if the fluid is gas. The trouble arises when the pressure in the formation is higher than that in the well. The pressure in the well is maintained by the type and amount of drilling fluid being circulated through it. Blowout preventers(BOPs), in conjunction with other equipment and techniques, are used to close the well in and allow the crew to control a kick before it becomes a blowout.
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Pavlovskaya, A. V., and O. A. Serebro. "Innovation effectiveness in oil and gas well drilling." Problems of Economics and Management of Oil and Gas Complex, no. 5 (2018): 21–26. http://dx.doi.org/10.30713/1999-6942-2018-5-21-26.
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Rommetveit, Rolv, and Anette Blyberg. "Simulation of gas kicks during oil well drilling." Modeling, Identification and Control: A Norwegian Research Bulletin 10, no. 4 (1989): 213–25. http://dx.doi.org/10.4173/mic.1989.4.3.
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Spanos, P. D., A. M. Chevallier, N. P. Politis, and M. L. Payne. "Oil and Gas Well Drilling: A Vibrations Perspective." Shock and Vibration Digest 35, no. 2 (March 1, 2003): 85–103. http://dx.doi.org/10.1177/0583102403035002564.
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Yershiyev, K. T., М. S. Kurbanbekov, B. T. Umraliyev, A. B. Izmukhanbetov, and A. O. Jakiyeva. "Casing while drilling technology." Azerbaijan Oil Industry, no. 01 (January 15, 2024): 17–22. http://dx.doi.org/10.37474/0365-8554/2024-01-17-22.
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The article explores advancements in the drilling well industry, highlighting continual improvements in the well construction cycle. It encompasses the evolution from initial steps like rig setup and drilling to the final stages of well commissioning. The paper emphasizes recent developments such as innovative drilling fluids, drill bits with diamond cutting elements for varying rock hardness, and advanced top drive systems. These enhancements have synergistically led to significant progress in drilling outcomes. The transition from traditional vertical and directional wells to sophisticated, high-tech wells, including horizontal, multilateral, and multi-bottom wells, is detailed. The role of these advanced wells in enabling oil and gas companies to extract previously challenging-to-reach oil and implement projects once deemed futuristic is underlined. The article also projects that the journey of technological advancements in well construction is far from over, with much progress expected in the future. Furthermore, the article delves into the potential of exploiting oil and gas fields using innovative drilling techniques on a casing string, marking a significant shift in the industry’s approach to well construction and resource extraction.
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Gao, Dewei, Jiajun Xie, Shengming Huang, Shenyao Wu, Pengcheng Wu, and Weian Huang. "Research and Application of Evaluation Methods for Functional Characteristics of Oil-Based Drilling Fluid in Shale Gas Wells." Geofluids 2021 (March 16, 2021): 1–9. http://dx.doi.org/10.1155/2021/8814032.
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Intelligent unconventional reservoir optimal production control technology is a comprehensive technology, involving geology, reservoir simulation, and efficient drilling and completion. Efficient drilling and completion provides a flow channel for unconventional oil and gas exploitation and a wellbore with good integrity for reservoir transformation, which is an important link in the efficient development of unconventional oil and gas. The application of industry standard method to evaluate the performance of oil-based drilling fluid has the problem of poor correlation. It cannot reflect the difference of performance among oil-based drilling fluid systems, which lacks the significance for field construction. Based on shale expansion, rolling dispersion experiment, and microporous membrane filtration loss test, the physicochemical mechanism of borehole wall instability in shale formation was investigated. The evaluation methods of shale lubrication, antiaccretion test, slake durability, buck hardness test, etc. are put forward, and the formula of oil-based drilling fluid is optimized. The lubrication and antiaccretion experiment method can effectively and intuitively characterize the cleaning and lubrication effect of drilling fluid on drilling tools. The slake durability evaluation method simulates the collision between drill cuttings and the drill string and well wall. The bucking hardness experiment is through testing the cuttings and the hardness change after drilling fluid action reflects its inhibitory effect. The new methods were used to evaluate the oil-based drilling fluid used in 4 wells in the Changning block. It was found that the drilling fluid of CN209H2 well adhered to the steel column with at least 0.41 g of cuttings; the recovery rate of the drilling fluid resistance of CN209H1 was up to 87.70%, and YX1200 oil-based drilling fluid plugging agent was selected through the microporous membrane experiment. In the process of drilling the well CN209H5, the new oil-based drilling fluid formulation improved the lubrication performance by 44%, accompanied by 95.48% recovery rate and less than 10 mL HTHP fluid loss at the same time. The research results show that the oil-based drilling fluid system optimized according to the new method can significantly inhibit shale hydration and dispersion and can effectively solve the problem of unstable performance of traditional oil-based drilling fluids in the Changning block.
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Dmitrievsky, A. N., N. A. Eremin, A. D. Chernikov, and L. I. Zinatullina. "USING ARTIFICIAL INTELLIGENCE METHODS TO PREVENT COMPLICATIONS IN WELL CONSTRUCTION." News of the Tula state university. Sciences of Earth 4, no. 1 (2021): 132–44. http://dx.doi.org/10.46689/2218-5194-2021-4-1-132-144.
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The article discusses the use of automated systems for preventing emergency situa-tions in the process of well construction using artificial intelligence methods to increase the productive time of well construction by reducing the loss of working time to eliminate compli-cations. Key words: problems and complications during drilling, emissions, gas and oil water showings, stuck, artificial neural networks, digitalization, drilling, well, field, oil and gas blockchain, artificial intelligence, machine learning methods, geological and technological research, neural network model, oil and gas construction wells, identification and forecasting of complications, prevention of emergency situations.
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Maratovna, Sadikova Adalat, and Artikova Gulnoza Arislan Qizi. "EXPANSION OIL WELL CEMENT BASED ON SUBSTANDARD RAW MATERIALS." American Journal of Applied Science and Technology 03, no. 06 (June 1, 2023): 26–29. http://dx.doi.org/10.37547/ajast/volume03issue06-06.
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Grouting cement is a type of Portland cement designed to insulate pipes of oil and gas wells and protect them from groundwater pressure, shifts of ground layers, and the negative effects of aggressive media. When solidified, the cement mortar forms a monolithic jacket, impermeable to liquids and gases. The material adheres firmly to the metal pipe and to the walls of the trunk drilled in the rock. The use of grouting cement creates conditions for safe operation of wells and prolongs their working period. In traditional construction, this type of Portland cement is not used. The exception is the foundation of drilling piles in difficult geological conditions. That's whay, the article presents the investigation of grouting cement with the basis of substandard raw materials.
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Arbad, Nachiket, and Catalin Teodoriu. "A Review of Recent Research on Contamination of Oil Well Cement with Oil-based Drilling Fluid and the Need of New and Accurate Correlations." ChemEngineering 4, no. 2 (April 14, 2020): 28. http://dx.doi.org/10.3390/chemengineering4020028.
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Drilling fluids and oil well cement are important well barriers. Their compatibility affects the long-term integrity of the well. The mixing of drilling fluid with the oil well cement causes contamination of oil well cement. If the contamination is due to diesel/oil-based drilling fluid (OBF) it adversely affects the rheological and mechanical properties of oil well cement—in other words, the long-term integrity of the well. An initial study on OBF contamination of oil well cement was carried out two decades ago. In recent years, several research projects were carried out on the same topic to understand the reason for changes in the properties of oil well cement with OBF contamination. This literature review shows that using OBF eliminates several drilling problems, as the long-term integrity of the well depends on the amount of OBF contamination in the cement slurry. This paper compares the experiments performed, results and conclusions drawn from selected research studies on OBF contamination of oil well cement. Their shortcomings and a way forward are discussed in detail. A critical review of these research studies highlights the need for new and accurate correlations for OBF-contaminated oil well cement to predict the long-term integrity of wells.
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Liu, Hongtao, Chongyuan Zhang, Li Zhao, Xuliang Zhang, Hongde Qin, Xiaogang Lv, and Junqi Yang. "Deep Well and Ultra-Deep Well Drilling and Completion Technology Optimization and Application of Kuche Piedmont Area." Highlights in Science, Engineering and Technology 25 (December 13, 2022): 1–6. http://dx.doi.org/10.54097/hset.v25i.3411.
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In recent years, the exploration and development of China's Tarim Basin has moved towards ultra-deep and complex areas. With the increase in well depth and the influence of the geological characteristics of the Kuche Piedmont area, a series of drilling problems for 8000m-level ultra-deep wells in this area have been caused. As a result, a series of new drilling and completion technologies have been formed: ①Based on the tower standard I type well structure, the improved tower standard II-B\II-C type well structure is used to solve the drilling of two sets of salt formations. Difficulties; ②Optimizing UDM-2 oil-based drilling fluid, achieving an average hole diameter expansion rate of only 6.82%, reducing lost circulation and other complications; ③Designing and optimizing a new type of multi-edge PDC bit to significantly increase the average ROP; ④Application The industry-leading pre-measurement resistivity technology successfully predicts the salt bottom; ⑤The application of fine controlled pressure cementing technology to achieve effective sealing of high-pressure saline formations. In recent years, the Kuche Piedmont Block in the Tarim Basin has continued to tackle key problems in the application of ultra-deep well drilling and completion technologies, and has successfully reached a new level of 8000m, which has played an important role in supporting the development of deep oil and gas exploration and development business.
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Al-adliy, Sajjad H., Faleh H. M. Al-mahdawi, Elhassan M. A. Mohammed, and Yasir M. F. Mukhtar. "Comparison Different Techniques of Optimum Location for Infill Well Drilling." Iraqi Journal of Chemical and Petroleum Engineering 25, no. 1 (March 30, 2024): 75–81. http://dx.doi.org/10.31699/ijcpe.2024.1.7.
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Increasing oil production from a reservoir can be achieved by decreasing the distance between the injector and the producer through a process known as infill drilling, which involves a pattern water flood. The main objective of this study is to provide a comprehensive overview of the optimal infill well location and the research and applications available to enhance the oil recovery factor, leading to increased economic profits. one effective empirical approach used in this study is based on decline curve analysis, which analyzes the production history of the well to determine the final economic recovery. Additionally, a numerical method that combines numerical simulation and optimization techniques has been proven to be successful in determining optimal infill drilling locations. The research results show that the volumetric computation of oil in place is a useful method for estimating the number of infill wells needed, but it does not consider heterogeneity and continuity. On the other hand, the numerical simulation and optimization techniques can quantify the remaining mobile oil post-infill drilling and establish optimal pattern configurations for maximum recovery at their centers.
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Yang, Li, Yun Peng An, Nan Tian, Jun Ma, and Jian Hua Yao. "Application Study of Phase Inversion for Drilling Fluid in Well Lianhua 000-X2#." Advanced Materials Research 524-527 (May 2012): 1153–56. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.1153.
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In order to reduce the flow resistance of a water-based drilling fluid, emulsifiers tend to be added into the drilling fluid mixed with oil at the same time. However, inappropriate proportion or oil-based pipe free agent with low HLB value could easily trigger the phase inversion of the drilling fluid, causing its stability loss or even water–solid separation. Therefore, starting from the root cause of the phase inversion, the surfactivity of solid-phase materials in the drilling fluid was changed from hydrophobicity to hydrophilicity by adding surfactants with high HLB value. Then its colloidal properties were reestablished by combining alkali diluting agent, and the drilling fluid with phase inversion of well Lianhua 000-X2# was treated indoors. The results of the field application in the well show that high-HLB surfactant can solve the phase inversion of a water-based drilling fluid properly, and that barite sedimentation and well control problem, caused by the phase inversion of the water-based drilling fluid with high-density, can be avoided.
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Herrnstadt, Evan, Ryan Kellogg, and Eric Lewis. "Drilling Deadlines and Oil and Gas Development." Econometrica 92, no. 1 (2024): 29–60. http://dx.doi.org/10.3982/ecta18436.
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Oil and gas leases between mineral owners and extraction firms typically specify a date by which the firm must either drill a well or lose the lease. These deadlines are known as primary terms. Using data from the Louisiana shale boom, we first show that well drilling is substantially bunched just before the primary term deadline. This bunching is not necessarily surplus‐reducing: using an estimated model of firms' drilling and input choices, we show that primary terms can increase total surplus by countering the effects of leases' royalties, as royalties are a tax on revenue and delay drilling. These benefits are reduced, however, when production outcomes are sensitive to drilling inputs and when drilling one well indefinitely extends the period of time during which additional wells may be drilled. We enrich the model to consider mineral owners' lease offers and find small effects of primary terms on owners' revenue.
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Shen, Zhenzhen, Heng Zhang, Xingying Yu, Mingwei Wang, Chaoli Gao, Song Li, and Haotian Zhang. "Experimental Optimization of High-Temperature-Resistant and Low Oil—Water Ratio High-Density Oil-Based Drilling Fluid." Processes 11, no. 4 (April 6, 2023): 1129. http://dx.doi.org/10.3390/pr11041129.
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Problems such as well loss and collapses in deep shale gas drilling are most often due to the development of cracks in the shale formation, resulting in significant leaks of drilling fluid, the sticking and burrowing of drilling tools, and other engineering accidents. In addition, the horizontal sections of wells are very long and issues of friction, rock transport, and formation contamination loom large. As a result, the performance of drilling fluids directly affects drilling efficiency, engineering accident rates, and reservoir protection effects. We first analyze the mechanisms of each emulsifier in an oil-based drilling fluid formulation and the filtration reduction mechanisms, taking into account the collapse-prone and abnormally high-pressure characteristics of shale formations. We undertake an experimental evaluation and optimization of polymeric surfactants, such as primary and secondary emulsions for high-performance oil-based drilling fluids. The design of rigid and deformable nano-micron plugging materials with a reasonable particle size range was achieved, and we obtained a low Oil—Water ratio and high-density oil-based drilling fluid system, with temperature resistance of 200 °C, an Oil—Water ratio as low as 70:30, compressive fracturing fluid pollution of 10%, and a maximum density of 2.6 g/cm3. The reuse rate reached 100%. The developed oil-based drilling fluid system with strong plugging, a high density, and a low Oil—Water ratio suitable for deep shale gas can effectively seal the well wall, reduce liquid invasion, prevent the wall from collapsing, reduce mud leakage, reduce the consumption of oil-based drilling fluid, improve the utilization rate of old mud, and reduce drilling costs.
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Ndubuisi Elizabeth Chinyerem, Maha Ifeanyi Emmanuel, and Iloke Emeka. "Optimization of well design and bit selection to reduce drilling cost and improve efficiency." World Journal of Advanced Research and Reviews 21, no. 3 (March 30, 2023): 2136–42. http://dx.doi.org/10.30574/wjarr.2024.21.3.0908.
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Drilling oil and gas well at the lowest possible cost has always been paramount to drilling engineers in order to achieve their company’s objectives. However, in most cases, this is not attained because of the problem associated with the drilling bit selection, drilling design and drilling parameters. As it is a fact that the large chunk of the cost of bringing oil and gas to the surface is always incurred at the drilling/completion stage. In this study, data were gathered from selected 5 Niger Delta wells and were analyzed. These data were used to calculate the costs of drill bits and the bits with lowest costs. The drilling cost was studied and optimization procedure employed to select the best bit from well data obtained. Bits RSS1, RSS2, RSS3, RSS4, GX1 and BX1 that were used to drill, were select for this study. Drilling cost relation was to ascertain the most cost-effective one. Drilling with bit RSS1 showed the lowest cost possible, therefore RSS1 was said to be optimized. In consideration of the drill bit specific energy (SE) with respect to the ROP, RSSI showed a low value, indicating minimal energy requirement for the successful drilling operation. Conclusively, the SE is a function of ROP and ROP was highest at the minimum SE. Optimized where the drilling cost was minimum.
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Wang, Fu Hua, Rui He Wang, and Xue Chao Tan. "How to Improve Rate of Penetration for Oil and Gas Wells." Advanced Materials Research 524-527 (May 2012): 1439–49. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.1439.
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Improved optimization of drilling bit selection and the compatibility between drilling bit and formation constraint the ROP and cost of deep well drilling to some extent. This combined with lab comprehensive lab drilling simulations and mechanisms of rock penetration can hold promise for improving drilling efficiency in deep wells. This paper reviews the mechanical characteristic parameters of rock engineering and demonstrates the obstacle of rock penetration in deep wells. Based on the general predictable formula of ROP, the relationship between drilling sensitive index and formation drillability is analyzed and the optimization and optimal match of drilling technology parameters are described. Technology Benefit Index (TBI) is proposed to evaluate the technical performance of drilling bit, advices and warnings from lab experiment and field experience on selecting and using bit are put forward. Statistical analysis of Well A based on TBI is made, the analysis of ROP improvement potential and overall program (including Bottom Hole Assembly, drilling parameters and type of drilling bit) of ROP improvement for Well B are worked out. Suggestions of drilling bit using based on mechanisms of rock penetration are proposed. Guided by the theory on improving ROP field tests of improving drilling rate are conducted to examine the field performance. By comparison, the tested sections yield high performance of ROP improvement. The designed program enhancing ROP for experiment section proves to be operable and shows great promise in further improvement and application.
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Hamad-Allah, Sameera M., and Ali A. Ismael. "APPLICATION OF MATHEMATICAL DRILLING MODEL ON SOUTHERN IRAQI OIL FIELDS." Journal of Engineering 14, no. 03 (September 1, 2008): 2763–84. http://dx.doi.org/10.31026/j.eng.2008.03.17.
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Minimum-cost well drilling demands the best use of controllable drilling variables for each formation to be drilled. To reach this aim, this study was divided into two main parts: The first part deals with applying a mathematical drilling model to field data of forty wells drilled at three major oil fields (RU, R, and Z). Bourgoyne & Young (1974) drilling model has been modified to take into consideration the combined effect of weight on bit, rotary speed, bit type, bit size, flow rate, drilling fluid density, drilling fluid viscosity, oil content, bit-nozzle size, formation drillability, formation abrasiveness, bit bearing constant, formation hardness, formation compressive strength, differential pressure between mud column pressure and formation pressure, and bit dullness on drilling rate at these fields. The measurements of formation compressive strength have been achieved using 34 core plugs. These plugs were cut and prepared for soft, medium, and hard formations under study. The drilling model was fitted to Field data by using multiple regression analysis technique. The results of analysis gave low standard deviation, high correlation coefficient, and good matching between measured and calculated drilling rate. The validity of modeling process has been verified by applying the proposed drilling model on other wells that have not been included in the main analysis. The second part deals with using the drilling model together with non-linear optimization technique to determine the optimum values of the controllable drilling variables. These variables are: weight on bit, rotary speed, flow rate, drilling fluid density, drilling fluid viscosity, oil content, bit-nozzle size. Using the proposed mathematical drilling model together with the Constrained Rosenbrock optimization technique achieved a marked reduction in drilling cost about 60%, 75%, 80% in soft, medium, and hard formations respectively. The results of optimization were used to construct optimum bit record for the next wells to be drilled. For comparison purpose, this optimum bit record has been used to reduce the drilling cost for well RU263 and saved about 295000 $ in the total cost of this well which is equal to 394176 $.
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Assi, Amel. "Non-Productive Time Reduction during Oil Wells Drilling Operations." Journal of Petroleum Research and Studies 12, no. 3 (September 11, 2022): 34–50. http://dx.doi.org/10.52716/jprs.v12i3.541.
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Often there is no well drilling without problems. The solution lies in managing and evaluating these problems and developing strategies to manage and scale them. Non-productive time (NPT) is one of the main causes of delayed drilling operations. Many events or possibilities can lead to a halt in drilling operations or a marginal decrease in the advancement of drilling, this is called (NPT). Reducing NPT has an important impact on the total expenditure, time and cost are considered one of the most important success factors in the oil industry. In other words, steps must be taken to investigate and eliminate loss of time, that is, unproductive time in the drilling rig in order to save time and cost and reduce wasted time. The data of six oil wells were approved for the purpose of the study, where it was noted that there are many factors affecting the NPT, which differ from one well to another. Its impact was limited to drilling rig, mud pump and equipment failure. There is also a difference between the planned program and what is actually happening on the ground, due to several reasons, including human errors during the implementation of the drilling program and others due to technical errors, Misuse of equipment, in addition to human errors related to the failure to implement the drilling program.
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Qiao, Zhongshan, Jiaxu Li, Haijian Zhao, Wen Ren, and Jiansheng Yu. "Analysis of Measures for Environmental Protection of Oil-base Drilling Fluid." International Journal of Power and Energy Engineering 3, no. 10 (October 31, 2021): 10–12. http://dx.doi.org/10.53469/ijpee.2021.03(10).03.
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With the continuous development of China ' s economy, social and industrial demand for crude oil is increasing. Therefore, how to efficiently develop oil and gas fields is the focus of oil industry practitioners. Drilling engineering is the top priority in oil and gas field development projects. Drilling fluid is an important part of oil drilling. Its main functions are cooling bit, carrying cuttings and protecting wellbore. Due to its complex composition, it will cause serious environmental pollution in the process of oil drilling. Oil-based drilling fluid is often used in special drilling operations, such as horizontal well drilling, which can effectively protect the wellbore stability and cause serious pollution to the environment. It is of great significance to strengthen the study of environmental protection measures of oil-based drilling fluid. The research on environmental protection measures of oil-based drilling fluid abroad was expounded.
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Eyvazov, Jabrayil, and Natig Hamidov. "The effect of hydraulic fracturing length to the well production." Journal of Physics: Conference Series 2594, no. 1 (October 1, 2023): 012022. http://dx.doi.org/10.1088/1742-6596/2594/1/012022.
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Abstract The lowering of the original or natural permeability of the reservoir rock close to the well bore is referred to as “formation damage.” Additionally, it can be described as any kind of procedure that lowers the productivity of an oil, water, or gas bearing formation. Production, drilling, hydraulic fracturing, and work over operations are just a few of the steps of recovering oil and gas from reservoirs that can result in formation damage, an unfavorable operational and financial issue. A well stimulation method used to raise well productivity is hydraulic fracturing. This method helps to transfer the crude oil and natural gas through the pores and artificially develops channels to the production well because they are stuck at specific locations in the rocks. The oil and gas are extracted from the well and delivered to the surface for further utilization. Fracturing fluid, also known as pumping fluid, typically created by mixing water and sand and injecting it under high pressure into the formation when using the hydraulic fracturing process. There are certain activities that cause damage near the wellbore which lead to reduction in productivity. The drilling operation itself causes damage to the formation as the solids and fluids of the drilling fluids, as well as the fines produced due to the drilling operation, invade the formation and reduce the formation permeability and the ability of the oil and gas to flow to the wellbore. Hydraulic fracturing improves the productivity by creating a conductive path into the reservoir. The length of hydraulic fracturing influences to the production of well. As well as length of hydraulic fracturing increases, oil and gas production from well is increasing. After some point of length, it does not influence to the production of well.
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Wang, Peng, Hui Zhang, Jun Li, Yuting Zhou, and Yifeng Fan. "Field Research and Application of Tracking Adjustment Technology While Drilling for a Horizontal Well in Block A." E3S Web of Conferences 416 (2023): 01016. http://dx.doi.org/10.1051/e3sconf/202341601016.
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A reservoir in Block A of an oil field is a new layer series in the new area, and a horizontal well has been deployed for the first time around the development of the target layer in the third section of the reservoir. Compared with the oil layers in the old area, the structure of the target layer in Block A is more complex, the reservoir changes rapidly, the prediction of sand-laden mud reservoir is difficult, and the tracking adjustment of horizontal wells while drilling is difficult. In view of the above problems, in order to ensure the drilling effect, we have carried out the basic geological research of the combination of well and earthquake, carried out the study of the correlation between rock and electricity and the combination of well and earthquake, carried out the multi-technology combination, innovatively formed the supporting technical methods of fine fault, micro-amplitude structure identification and reservoir prediction, established the fine three-dimensional geological model, optimized the well location and trajectory optimization design of favorable blocks, According to the technical process of “making plans before drilling, timely adjustment during drilling, and re-recognition after drilling”, 7 horizontal wells have been tracked and adjusted while drilling, with an average oil reservoir drilling rate of 85.3%, which has achieved good drilling results and increased geological reserves and productivity.
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Zhou, Xin. "Application of Well Control Technology in Drilling Engineering." International Journal of Power and Energy Engineering 3, no. 10 (October 31, 2021): 42–44. http://dx.doi.org/10.53469/ijpee.2021.03(10).08.
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Drilling operation is the leader of the oil exploration and development industry. The complexity of the process determines the characteristics of high investment and high risk. The particularity of the operating conditions determines the characteristics of labor intensity, gravity, and three-dimensional intersection, which all make the drilling operation process have various risks. These risks affect the efficiency and progress of operations, and even cause major accidents in serious cases, leading to casualties and property losses. Therefore, it is necessary to further improve the well control safety technology, so that the drilling work will gradually move towards scientific, safe and refined technology development direction. Through field investigation and literature reading, the risk of drilling operation is analyzed, and the causes, classification and characteristics of drilling operation risk are summarized. This paper summarizes the complexity of drilling accidents and the importance of risk control research. Since the risk control of drilling operations involves many fields, this paper only makes preliminary analysis and exploration, and further research and exploration are needed to improve the risk control of drilling operations.
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Eldar Suleymanov, Eldar Suleymanov, and Babil Sultanov Babil Sultanov. "COMPLICATION DURING WELL DRILLING AND THEIR PREVENTION." PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 16, no. 05 (April 25, 2022): 26–32. http://dx.doi.org/10.36962/pahtei16052022-26.
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The article provides a brief analysis of the complications that occur during the drilling of wells and their prevention. Violation of normal working conditions during drilling of wells occurs as a result of the impact of geological factors, disruption of technical and technological processes, as well as improper organization of work. Improper organization of work means a lack of manpower in the rig, failure to bring the necessary materials and tools to the rig, timely elimination of defects in the installation work. Due to technical failures of surface and wellhead equipment, long-term oil and gas-water fountains, as well as wells may be seriously complicated. Many complications occur as a result of incorrect technological process. These include the bending of the wellbore, the collapse of the well wall, the formation of a groove in the wellbore, and the occurrence of oil-gas-water through the protective belts. A lot of time and money is spent to prevent complications, which reduces the technical and economic performance of drilling. A number of measures should be taken in advance to prevent complications, as it is very difficult to prevent complications once they occur. Keywords: Drilling of wells, complications in the well, disruption of technological processes, disruption of the wellbore, protective belt, collapse of the well wall.
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Kuleshova, Lyubov, Ruslan Gilyazetdinov, Vyacheslav Sh Mukhametshin, and Shamil Mingulov. "Choosing well grid density for low productivity carbonate reservoirs." E3S Web of Conferences 480 (2024): 01016. http://dx.doi.org/10.1051/e3sconf/202448001016.
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Based on the analysis and generalization of the experience in developing various groups of low-productivity deposits in the carbonate reservoirs of the Volga-Ural oil and gas province, the article proposes geological and statistical dependencies that allow for a differentiated choice of grid density for wells both between selected groups of objects and within them, depending on the geological characteristics. Technical and economic calculations determined the drilling zones and helped select an optimal well grid density. Calculations were made using geological and commercial data on sufficiently studied deposits, which are currently in the final stage of operation. The results presented in this paper allow us to solve a wide range of field development tasks in order to extract residual oil reserves by drilling new wells with an individual design at each facility or drilling side shafts.
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Song, Xing-liang, Yi Zhang, Chun-hui Zhang, Xin-rong Zhou, and LI-hong Kong. "Discussion on Well Control Technique During Post-fracturing Tool Interval." Journal of Physics: Conference Series 2594, no. 1 (October 1, 2023): 012007. http://dx.doi.org/10.1088/1742-6596/2594/1/012007.
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Abstract In the oil and gas exploration and development safety work, well control is the top priority, which goes deep into every field of oil exploration and development production. How to improve the well control consciousness of drilling engineering in the normal production process of actual drilling engineering has become an important subject faced by petroleum exploration and development. This paper focuses on the research and analysis of fracturing string internal well control problems, and puts forward a series of solutions and suggestions according to the practical experience.
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Kobilov, Nodirbek, Bosit Khamidov, Abror Shukurov, Sarvar Kodirov, and Kuvonchbek Juraev. "New composition of chemicals and heavy drilling fluids for drilling oil and gas wells." E3S Web of Conferences 401 (2023): 05077. http://dx.doi.org/10.1051/e3sconf/202340105077.
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The article shows the importance of obtaining new composition of heavy drilling fluids based on composite chemical reagents from local raw materials and industrial wastes for drilling oil and gas wells. In the process of building oil and gas wells to maintain the stability of the walls, to prevent the flow of salts, and to prevent the penetration of formation fluids into the well, it becomes necessary to increase the density of the drilling fluid, which can be accomplished by introducing components with increased density. For obtaining and stabilization heavy drilling fluid were investigated and recommended new compositions of powder water soluble gossypol resin and carboxymetylcellylose sodium and other minerals. Stabilization indexes and their determination in the drilling process of oil and gas wells have been investigated. The result of research have been implemented in the drilling process of oil and gas wells with abnormally high reservoir pressure.
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Ganiev, R. I., Luc Deboer, A. H. Agliullin, and R. A. Ismakov. "Dual gradient drilling: a pilot test of decanter centrifuge for CAPM technology." SOCAR Proceedings, SI2 (December 30, 2021): 70–79. http://dx.doi.org/10.5510/ogp2021si200585.
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The article is about problem of drilling deepwater oil and gas wells that consists in complicating and increasing cost of their well design due to narrowing mud window at different depths. The authors analyse drilling technology developed and applied in practice of offshore drilling with a dual gradient drilling, which allows drilling significant intervals without overlapping an intermediate casing string. Based on analysis of these technologies and taking into account their disadvantages the authors proposed and tested a new drilling technology of dual gradient drilling with placement of all necessary innovative equipment on drilling platform. Keywords: managed pressure drilling; deepwater drilling; offshore drilling; dual gradient drilling; riser; oil and gas exploration in sea.
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Benkherouf, Lakdere, and Susan Pitts. "On a multidimensional oil exploration problem." Journal of Applied Mathematics and Stochastic Analysis 2005, no. 2 (January 1, 2005): 97–118. http://dx.doi.org/10.1155/jamsa.2005.97.
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This paper is concerned with optimal strategies for drilling in an oil exploration model. An exploration area contains n1 large and n2 small oilfields, where n1 and n2 are unknown, and represented by a two-dimensional prior distribution π. A single exploration well discovers at most one oilfield, and the discovery process is governed by some probabilistic law. Drilling a single well costs c, and the values of a large and small oilfield are v1 and v2 respectively, v1>v2>c>0. At each time t=1,2,…, the operator is faced with the option of stopping drilling and retiring with no reward, or continuing drilling. In the event of drilling, the operator has to choose the number k, 0≤k≤m (m fixed), of wells to be drilled. Rewards are additive and discounted geometrically. Based on the entire history of the process and potentially on future prospects, the operator seeks the optimal strategy for drilling that maximizes the total expected return over the infinite horizon. We show that when π≻π′ in monotone likelihood ratio, then the optimal expected return under prior π is greater than or equal to the optimal expected return under π′. Finally, special cases where explicit calculations can be done are presented.