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Littérature scientifique sur le sujet « Stress and fracturing field »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Stress and fracturing field"

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Feng, Yan Jun, et Xiu Wei Shi. « Hydraulic Fracturing Process : Roles of In Situ Stress and Rock Strength ». Advanced Materials Research 616-618 (décembre 2012) : 435–40. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.435.

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This paper presents results of a comprehensive study involving analytical and field experimental investigations into the factors controlling the hydraulic fracturing process. Analytical theories for fracture initiation of vertical and horizontal borehole are reviewed. The initiation and propagation process of hydraulic fracturing is performed in the field by means of hydraulic fracturing and stepwise hydraulic fracturing, the effect of factors such as in-situ stress and rock strength on fracture propagation process is studied and discussed. The fracture initiation pressures estimated from the analytical model and field experiments are compared as well as the fracturing process during case 1and case 2. Results from the analytical model and field experiments conducted in this study are interpreted with a particular effort to enlighten the factors controlling the hydraulic fracturing process.
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Zhao, Wan Chun, Chen Wang, Ting Ting Wang et Bing Guan. « Calculation Model Study on Damaging Stress of Hydraulically Created Fracture Propagation ». Applied Mechanics and Materials 275-277 (janvier 2013) : 238–41. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.238.

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In order to describe hydraulically created fracture propagation’s characteristics of rock matrix exactly, in this paper, establishing a stress field ‘s calculation model of fracturing propagation tip , obtaining numerical method of fracturing propagation’s characteristics based on damaging and describing fracturing propagation’s characteristics combined with method of finite element. Research shows that the corrigendum between stress field ‘s calculation model of fracturing propagation tip and practical engineering are 0.64 percent and 1.43 percent respectively. Compared with the traditional method, the result is more exactly.
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Wang, Shuanlin, et Jianqiao Luo. « Study on the Shadow Effect of the Stress Field around a Deep-Hole Hydraulic-Fracturing Top-Cutting Borehole and Process Optimization ». Processes 11, no 2 (24 janvier 2023) : 367. http://dx.doi.org/10.3390/pr11020367.

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The clean utilization and green development of coal resources have become a research focus in recent years. Underground hydraulic fracturing technology in coal mines has been widely used in roof pressure relief, top coal pre-splitting, gas drainage, roadway pressure relief and goaf disaster prevention. Different in situ stress types cause great differences in the stress field around the boreholes, the critical pressure of the fracture initiation, and the direction of the fracture expansion trend; in addition, the stress shadow effect generated by the superposition of stress fields between boreholes relatively close together has a mutual coupling effect on the evolution of the stress field, the development of the plastic zone, and the crack propagation of the rock mass. Therefore, an effective method to solve the problem is to establish a mechanical model of hydraulic fracturing in boreholes for theoretical calculation, determine the influence mechanism of the crack shadow effect, and design a numerical simulation experiment of the equivalent stress fluid–solid coupling of hydraulic fracturing under different pore diameters and spacings. In addition, combining rock mechanics and fracture mechanics to analyze the influence of the shadow effect of the stress field between cracks on the evolution of the equivalent stress and the plastic zone is one of the important advances in this paper. Considering the engineering background of the site, the geological conditions and the requirements of general regulations, it is considered that the parameter selection of roof fracturing hydraulic fracturing technology in the Yushen mining area is more suitable when 0.12 m hole diameter and 3.5 m hole spacing are selected.
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Chang, Muhsiung, et Ren-Chung Huang. « Observations of hydraulic fracturing in soils through field testing and numerical simulations ». Canadian Geotechnical Journal 53, no 2 (février 2016) : 343–59. http://dx.doi.org/10.1139/cgj-2015-0193.

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Hydraulic fracturing is a potential cause of leakage of earth dams or loss of fluid in drilling and field permeability testing. The effect of hydraulic fracturing on soil grouting is also a major concern. Although hydraulic fracturing has been adopted for decades by the petroleum industry for oil recovery in rock formations, studies on fracturing in soils are relatively few and inconclusive. The aim of this study is to provide further insight into the mechanism of hydrofracturing in soils through a field grouting trial and numerical simulation. We observe hydraulic fracturing in soils during this field trial as predicted by generally accepted groutability requirements. The hydraulic fractures are found vertically developed up to the ground surface. Numerical simulations show the hydraulic fracturing is easier to be initiated in anisotropic stress conditions, where the minor principal stress is the key factor. Numerical simulations also demonstrate significant compressions and shears during injection, suggesting the mechanism of fracturing in soils would be a shearing type. Based on this study, we propose a punching and splitting mode for the hydrofracturing in soils. The equation associated with estimating fracturing pressure is verified, and the results are found to be in good agreement with the cases examined.
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Meng, Wei, et Chuan He. « Back Analysis of the Initial Geo-Stress Field of Rock Masses in High Geo-Temperature and High Geo-Stress ». Energies 13, no 2 (11 janvier 2020) : 363. http://dx.doi.org/10.3390/en13020363.

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In a high geo-temperature environment, it is rarely reported that geo-temperature has been considered during a back analysis. This may cause the initial geo-stress field that is obtained by a back analysis to be wrong. In this study, according to the theory of elasticity, the theoretical solution of the hydraulic fracturing equation is obtained in a high geo-temperature environment. Since the vertical stress that is obtained by the hydraulic fracturing method is calculated using the density of overlying strata, this vertical stress lacks the thermal stress that is caused by geothermal gradients. Therefore, in a high geo-temperature environment, inverting the initial geo-stress field of rock masses directly using the stress that is measured by the hydraulic fracturing method can cause serious errors. We propose that the regression coefficient of a gravitational stress field should be set to one during a back analysis if stresses are measured by the hydraulic fracturing method, and this regression coefficient should not be equal to one if stresses are measured by overcoring methods. We also propose a workflow for the back analysis of the initial geo-stress field of rock masses that considers geo-temperature, and this workflow is applied to the Sangzhuling tunnel in China.
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Zeng, Zhengwen. « Frac-n-Flow Testing to Screen Brittle Fracture Stages in Wolfcamp Formation, Permian Basin, USA ». Energies 14, no 17 (1 septembre 2021) : 5450. http://dx.doi.org/10.3390/en14175450.

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A new technique, fracturing-and-flowing (frac-n-flow) testing, is introduced for horizontal drilling and multistage hydraulic fracturing (HDMHF) practitioners to check if the next stage would be a brittle fracture using the instantaneous shut-in pressure (ISIP) from the current stage. It was developed to reduce the number of not-flowing clusters in HDMHF treatments due to stress shadows in the development of tight oil reserves in Wolfcamp, Permian Basin, USA, and other similar fields. Preliminary frac-n-flow testing results show that a medium (200–1000 psi) increase in confining pressure under representative field in-situ stresses can transfer Indiana limestone from brittle fracturing to semi-ductile failing. Consequently, folds of increase (FOI) of matrix permeability vary from +13 (i.e., increase by 1300%) to −0.39 (i.e., decrease by 39%). Limestone is one of the major lithological components in Wolfcamp formation. Field ISIP data of two HDMHF wells in Wolfcamp formation show that the maximum stress shadows are +1297 psi and +1716 psi, respectively. These stress shadows might have transferred the fracturing process from brittle to semi-ductile, converting the corresponding stages from being stimulated and conductive (fracturing-n-flowing) to being damaged and not-flowing (failing-n-not-flowing). Field completion reports of the two wells confirmed that screen-out and other interruptions of operation occurred in these high stress shadowed stages.
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Lu, Cong, Li Ma, Jianchun Guo, Lin Zhao, Shiqian Xu, Bugao Chen, Yulong Zhou, Haoren Yuan et Zhibin Tang. « Fracture Parameters Optimization and Field Application in Low-Permeability Sandstone Reservoirs under Fracturing Flooding Conditions ». Processes 11, no 1 (16 janvier 2023) : 285. http://dx.doi.org/10.3390/pr11010285.

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To solve engineering problems in the production process after fracturing and flooding of low-permeability sandstone reservoirs, such as rapid water-cut rise and low water flooding efficiency, a method for optimizing the fracture parameters of low-permeability sandstone reservoirs under fracturing flooding conditions was proposed. A rock property test experiment was first carried out, the fracturing coefficient was defined, and an evaluation method for the brittleness index of low-permeability sandstone was established to optimize the perforation location of the fracturing reservoir. A productivity numerical model for the two-phase flow of oil–water in matrix–fracture media was established to optimize the fracture morphology under fracturing flooding conditions. The results showed that the quartz content, Young’s modulus, and peak stress mainly affected the fracturing coefficient of rock and are the key indicators for evaluating the brittleness of low-permeability sandstone reservoirs. For production wells in the direction of minimum horizontal principal stress, the swept area of water flooding should be expanded, fracture length should be optimized to 90 m, and fracture conductivity should be 20 D·cm. For fracturing production wells in the direction of maximum horizontal principal stress, the advancing speed of the water injection front should be slowed down to reduce the risk of water channeling in injection-production wells. The optimized fracture length was 80 m, and the fracture conductivity was 25 D·cm. The application of these findings can markedly improve oil production and provide a reference for optimizing the fracture parameters of low-permeability sandstone reservoirs under fracturing flooding conditions.
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Fu, Jun Hui, Guang Cai Wen, Fu Jin Lin, Hai Tao Sun, Ri Fu Li et Wen Bin Wu. « Coal Mine Hydraulic Fracturing Underground Drainage Research and Engineering Application ». Applied Mechanics and Materials 863 (février 2017) : 334–41. http://dx.doi.org/10.4028/www.scientific.net/amm.863.334.

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Using elastic mechanics and fracture mechanics, analyzing the coal seam hydraulic fracturing breakdown pressure, given its theoretical formula. According to hydraulic fracturing stress status, given the form of two typical hydraulic fracture morphology. Analyzing hydraulic fracturing highly elliptical shape. The displacement field in plane stress state is given, and the theoretical formula of fracturing radius of hydraulic fracturing is deduced. The fracturing technology of underground fracturing is presented, and the fracturing location and fracturing parameters are determined. In Sihe Coal Mine conducted fracturing test, the test results showed that: the average of drainage volume of fracturing hole improved 4.4 times compared with non-pressed-hole. The extraction compliance time is reduced by 38%. Roadway tunneling speed was improved by 15%. It can solve the problem of gas overrun in roadway excavation well, and has a good application and popularization value.
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Feng, Jing, Qian Sheng, Chao Wen Luo et Jing Zeng. « The Application of Hydraulic Fracturing in Storage Projects of Liquefied Petroleum Gas ». Key Engineering Materials 306-308 (mars 2006) : 1509–14. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.1509.

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It is very important to study the pristine stress field in Civil, Mining, Petroleum engineering as well as in Geology, Geophysics, and Seismology. There are various methods of determination of in-situ stress in rock mass. However, hydraulic fracturing techniques is the most convenient method to determine and interpret the test results. Based on an hydraulic fracturing stress measurement campaign at an underground liquefied petroleum gas storage project which locates in ZhuHai, China, this paper briefly describes the various uses of stress measurement, details of hydraulic fracturing test system, test procedure adopted and the concept of hydraulic fracturing in arriving at the in-situ stresses of the rock mass.
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Zhang, Zuxun, Hongtu Wang, Bozhi Deng, Minghui Li et Dongming Zhang. « Field Investigation of Hydraulic Fracturing in Coal Seams and Its Enhancement for Methane Extraction in the Southeast Sichuan Basin, China ». Energies 11, no 12 (10 décembre 2018) : 3451. http://dx.doi.org/10.3390/en11123451.

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Hydraulic fracturing is an effective technology for enhancing the extraction of reservoir methane, as proved by field experience and laboratory experiments. However, unlike conventional reservoirs, coal seams had high stress sensitivity and high anisotropy. Therefore, the efficiency of hydraulic fracturing in coal seams needs to be investigated. In this study, hydraulic fracturing was performed at Nantong mine in the southeast Sichuan basin, China. The field investigation indicated that the hydraulic fracturing could significantly enhance the methane extraction rate of boreholes ten times higher than that of normal boreholes in one of the minable coal seams (named #5 coal seam). The performance of hydraulic fracturing in three districts revealed that compared with south flank, the fluid pressure was higher and the injection rate was lower in north flank. The methane extraction rate of south flank was inferior to that of north flank. It indicated hydraulic fracturing had less effect on #5 coal seam in south flank. Moreover, the injection of high-pressure water in coal seams could also drive methane away from boreholes. The methane extraction rate of the test boreholes demonstrated the existence of methane enrichment circles after hydraulic fracturing. It indicated that hydraulic fracturing did act on #5 coal seam in south flank. However, due to the high stress sensitivity of coal seams and the high geo-stress of south flank, the induced artificial fractures in #5 coal seam might close with the decline of the fluid pressure that led to a sharp decline of the methane extraction rate.
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Thèses sur le sujet "Stress and fracturing field"

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Robeck, Eric Dean. « The effects of fault-induced stress anisotropy on fracturing, folding and sill emplacement : insights from the Bowie coal mines, southern Piceance basin, western Colorado / ». Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd760.pdf.

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Charsley, Andrew Darrin. « Interpretation of sleeve fracturing for stress measurement ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0010/MQ61252.pdf.

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Kim, Kwangmin. « Rock Fracturing & ; Mine to Mill Optimization ». Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/242456.

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The research presented in this dissertation consists of four topics. The first of these topics is an experimental study of rock fracturing due to rapid thermal cooling, and the other three topics are related to mine-to-optimization. This includes the development and testing of a site-specific model for blast fragmentation, the development of a technique for utilizing digital image processing and ground-based LIDAR for rock mass characterization, and an experimental study of the effects of ore blending on mineral recovery. All four topics are related through the subject of rock fracturing and rock fragmentation. The results from this research are important and can be used to improve engineering design associated with rock excavation and rock fragmentation. First of all, a successful set of laboratory experiments and 3D numerical modeling was conducted, looking at the effects of rapid thermal cooling on rock mechanical properties. The results gave the unexpected finding that depending on the rock type and the thermal conditions, rapid cooling can result in either overall crack growth or crack closing. Secondly, a site-specific model for predicting blast fragmentation was developed and tested at an open-pit copper mine in Arizona. The results provide a practical technique for developing a calibrated blasting model using digital images and digital image processing software to estimate in-situ block size, and a calibrated Schmidt hammer to estimate intact tensile strength. Thirdly, a new technique was developed to conduct cell mapping in open-pit mines using the new technologies of digital image processing and ground-based LIDAR. The results show that the use of these new technologies provide an increased accuracy and the ability for more sophisticated slope stability analyses with no increase in field time only a moderate increase in data processing time. Finally, a successful set of laboratory experiments was conducted looking at the effects of ore blending and grinding times on mineral recovery from a set of six ore from a copper mine in Arizona. The results gave the unexpected finding that for a fixed grinding time, the mineral recovery of the blended ores exceeded the average of the individual recoveries of the same ores unblended.
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Tang, Yin-tong. « Rock stress determination in Hong Kong Island by using hydraulic fracturing method / ». View the Table of Contents & ; Abstract, 2005. http://sunzi.lib.hku.hk/hkuto/record/B36357625.

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Tang, Yin-tong, et 鄧燕棠. « Rock stress determination in Hong Kong Island by using hydraulic fracturing method ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B45014322.

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Anyanwu, Ezechukwu John. « Low Alloy Steel Susceptibility to Stress Corrosion Cracking in Hydraulic Fracturing Environment ». University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1398948610.

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nn, Arthur Glenn Arthur. « Microseismicity in the Ekofisk field : faulting and fracturing in a compacting chalk reservoir ». Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.551325.

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Passive microseismic monitoring provides a non-invasive method of monitoring deformation and changes in the stress distribution within a rock mass. Recently the petroleum industry has applied and focussed such studies on the monitoring of hydraulic fracturing stimulation: the fracturing of a reservoir by the injection of a high pressure fluid into reservoir causing the rock to fracture, increasing the permeability. However, the development of passive seismic monitoring of a fully operational oil field has been slow largely due to economic constraints limiting the geophone array to be deployed within a single vertical borehole. The challenge is thus to refine the seismic methods applied to datasets from the vertical arrays and to explore the extent to which further investment in more sophisticated seismic arrays would advance the understanding of the reservoir architecture and evolution. The Ekofisk reservoir in the North Sea provides an excellent opportunity to address these issues and is the focus of this study. Discovered in 1969 the Ekofisk field is located within the Central Graben of the Norwegian North Sea and is operated by Conoco-Phillips. It was one of the world's first economically viable chalk reser- voirs and comprises two main oil bearing intervals: the Ekofisk and Tor Formation chalks, separated by a relatively impermeable siliceous chalk. Since the onset of production in 1971, the reservoir has expe- rienced appreciable subsidence. A water injection program was initiated but has done little to mitigate the problem. In April 1997, one of the first hydrocarbon passive micro seismic monitoring studies was undertaken over an 18 day period at Ekofisk in an attempt to understand the mechanism of deformation. Data were acquired using a six station geophone array deployed in a vertical borehole. Fundamental to the study of seismicity at any scale is the accurate determination of the event source. Events for borehole microseismics are usually located using a ID velocity model, P- and S-wave arrival times and the polarisation azimuth of the P-wave particle motion. However, in the case of all sensors being deployed within a vertical or near-vertical bore hole such analysis leads to an inherent 1800 ambiguity in source location. In this study, this ambiguity is removed by using the back-projecion of the dip of the particle motion from multiple stations until they converge on one side of the well or the other as a priori information to constrain the initial source location. The procedure is developed and tested using a dataset acquired from another field during hydraulic fracture stimulation, where event locations are known. Applying this procedure to the Ekofisk dataset 627 events are successfully located with coherent features clustering around production/waterflooding wells and fractures. Most are located less than 250 m away from the monitoring well and at a depth of ",3 km in the Ekofisk chalk formation. Little seismicity is observed from the underlying Tor Formation chalk, which is separated from the Ekofisk Formation by an impermeable layer of siliceous chalk. There is no evidence of seismicity in the overburden. Repeating earthquakes (multiplets) are identified and relatively re-located in order to enhance the resolution of active features and gain further insight into the mechanism of deformation. Qualitative analysis of the waveforms of the multiplets shows a number of potential mechanisms such as production/waterflooding induced activity, fault re-activation and stress triggering. Having established precise hypocentres for the Ekofisk microseismicity the final goal of this study is to gain information along the source-receiver raypath using a shear wave splitting study of anisotropy. An automated shear wave splitting approach is applied to the Ekofisk dataset yielding 1125 reliable measurements. A number of near-vertical fracture sets with fracture strike orientations of NE-SW and W-SE agrees with previous core based studies of Ekofisk. In summary, this thesis shows that a single borehole deployment of geophones can be used to gather detailed information about the spatial and temporal variation in seismicity in a hydrocarbon setting. The seismic data can then be used via study of seismic anisotropy to place fundamental new constraints on the state of stress, mineral alignment, layering of sedimentary structures or the presence of aligned fracture sets all of which have profound implications for reservoir management.
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Stafford, Catherine Elizabeth. « An experimental study of the compaction and creep behaviour of oolitic sands ». Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312997.

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Du, Jing. « Geophysical inversion of far-field deformation for hydraulic fracture and reservoir information / ». Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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Dölle, Michael. « Field effect transistor based CMOS stress sensors / ». Tönning ; Lübeck Marburg : Der Andere Verlag, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016086105&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Livres sur le sujet "Stress and fracturing field"

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Charsley, Andrew Darrin. Interpretation of sleeve fracturing for stress measurement. Sudbury, Ont : Mineral Resources Engineering, Laurentian University, 2000.

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2

Rundle, T. A. In-situ stress measurements in the earth's crust in the Eastern United States. Washington, D.C : The Commission, 1987.

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Ove, Stephansson, et SpringerLink (Online service), dir. Stress Field of the Earth’s Crust. Dordrecht : Springer Science+Business Media B.V., 2010.

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Zang, Arno, et Ove Stephansson. Stress Field of the Earth’s Crust. Dordrecht : Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-1-4020-8444-7.

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S, Piascik Robert, et Langley Research Center, dir. A back face strain compliance expression for the compact tension specimen. Hampton, Va : National Aeronautics and Space Administration, Langley Research Center, 1998.

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C, Haimson Bezalel, China. Guo jia di zhen ju, University of Wisconsin--Madison et Stanford University, dir. In-situ strees project, technical report number 6 : Results of hydraulic fracturing stress measurements at Jianchuan, western Yunnan Province, China. [Menlo Park, CA] : Dept. of the Interior, U.S. Geological Survey, 1987.

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Choudhury, Shuvasish, et Debojyoti Moulick. Response of Field Crops to Abiotic Stress. Boca Raton : CRC Press, 2022. http://dx.doi.org/10.1201/9781003258063.

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H, Ice Gillian, et James Gary D, dir. Measuring stress in humans : A practical guide for the field. Cambridge : Cambridge University Press, 2007.

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J, Ader Mark, et Geological Survey (U.S.), dir. In-situ stress project technical report number 7 : The use of mechanical pressure and temperature gauges in hydraulic fracturing at the Cajon Pass well, California. [Denver, Colo.?] : Dept. of the Interior, U.S. Geological Survey, 1987.

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J, Ader Mark, et Geological Survey (U.S.), dir. In-situ stress project technical report number 7 : The use of mechanical pressure and temperature gauges in hydraulic fracturing at the Cajon Pass well, California. [Denver, Colo.?] : Dept. of the Interior, U.S. Geological Survey, 1987.

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Chapitres de livres sur le sujet "Stress and fracturing field"

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Zhu, Changxu, Yue Tao, Yi Wang et Xiaohua Zhou. « Analysis of the ground stress field before repeated fracturing in fractured reservoirs ». Dans Advances in Energy Materials and Environment Engineering, 435–45. London : CRC Press, 2022. http://dx.doi.org/10.1201/9781003332664-61.

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Ren, Jia-wei, Qi-hong Feng, Xian-min Zhang et Ze-hao Xie. « Fracturing Spacing Optimization Study of Tight Oil Horizontal Well Based on Induced Stress Field ». Dans Springer Series in Geomechanics and Geoengineering, 1017–29. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0761-5_95.

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Eringen, A. Cemal. « Stress ». Dans Microcontinuum Field Theories, 35–56. New York, NY : Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-0555-5_2.

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Pei, Yuxin, Lifei Shao, Daqi Fu, Fuchun Tian, Taiwei Yang, Lei Shi et Yuyang Zou. « Successful Application of Self-propping Fracturing Fluid System in Volume Fracturing of Tight Reservoir ». Dans Proceedings of the International Field Exploration and Development Conference 2021, 5557–72. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2149-0_509.

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Zang, Arno, et Ove Stephansson. « Global Stress ». Dans Stress Field of the Earth’s Crust, 253–76. Dordrecht : Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-1-4020-8444-7_11.

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Zang, Arno, et Ove Stephansson. « Stress Definition ». Dans Stress Field of the Earth’s Crust, 17–35. Dordrecht : Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-1-4020-8444-7_2.

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Zheng, Wei-shi. « Fracture Research of Liquid Carbon Dioxide Fracturing ». Dans Proceedings of the International Field Exploration and Development Conference 2021, 1568–72. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2149-0_146.

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Fokker, Peter, Abel Jan Smit et Ad Barth. « Field evidence of salt fracturing and healing in a MgCl2 cavern field ». Dans The Mechanical Behavior of Salt X, 488–96. London : CRC Press, 2022. http://dx.doi.org/10.1201/9781003295808-45.

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Li, Yun-zi, Jun-kai Lu, Fei Yan et Qian Wang. « Fracturing Parameters Optimization for Multistage Horizontal Well Fracturing Design in Ultra-low Permeability Reservoirs in Jidong Oilfield ». Dans Proceedings of the International Field Exploration and Development Conference 2021, 4838–49. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2149-0_449.

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Zang, Arno, et Ove Stephansson. « Generic Stress Data ». Dans Stress Field of the Earth’s Crust, 225–52. Dordrecht : Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-1-4020-8444-7_10.

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Actes de conférences sur le sujet "Stress and fracturing field"

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Weng, Xiaowei, et Eduard Siebrits. « Effect of Production-Induced Stress Field on Refracture Propagation and Pressure Response ». Dans SPE Hydraulic Fracturing Technology Conference. Society of Petroleum Engineers, 2007. http://dx.doi.org/10.2118/106043-ms.

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Wang, Shize, Zhaoliang Wu, Rugang Liao, Gang Xu, Xiaoping Wan, Jinling Du et Wei Liu. « The Application of Numerical Simulation Stress Field in Shale Fracture Diagnostics ». Dans SPE Asia Pacific Hydraulic Fracturing Conference. Society of Petroleum Engineers, 2016. http://dx.doi.org/10.2118/181846-ms.

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Zhang, Jianguo, Karthik Mahadev, Stephen Edwards et Alan Rodgerson. « A Novel Method and its Application to Define Maximum Horizontal Stress and Stress Path ». Dans SPE Hydraulic Fracturing Technology Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204148-ms.

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Abstract Maximum horizontal stress (SH) and stress path (change of SH and minimum horizontal stress with depletion) are the two most difficult parameters to define for an oilfield geomechanical model. Understanding these in-situ stresses is critical to the success of operations and development, especially when production is underway, and the reservoir depletion begins. This paper introduces a method to define them through the analysis of actual minifrac data. Field examples of applications on minifrac failure analysis and operational pressure prediction are also presented. It is commonly accepted that one of the best methods to determine the minimum horizontal stress (Sh) is the use of pressure fall-off analysis of a minifrac test. Unlike Sh, the magnitude of SH cannot be measured directly. Instead it is back calculated by using fracture initiation pressure (FIP) and Sh derived from minifrac data. After non-depleted Sh and SH are defined, their apparent Poisson's Ratios (APR) are calculated using the Eaton equation. These APRs define Sh and SH in virgin sand to encapsulate all other factors that influence in-situ stresses such as tectonic, thermal, osmotic and poro-elastic effects. These values can then be used to estimate stress path through interpretation of additional minifrac data derived from a depleted sand. A geomechanical model is developed based on APRs and stress paths to predict minifrac operation pressures. Three cases are included to show that the margin of error for FIP and fracture closure pressure (FCP) is less than 2%, fracture breakdown pressure (FBP) less than 4%. Two field cases in deep-water wells in the Gulf of Mexico show that the reduction of SH with depletion is lower than that for Sh.
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Aadnoy, B. S. « Inversion Technique To Determine the In-Situ, Stress Field From Fracturing Data ». Dans SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1988. http://dx.doi.org/10.2118/18023-ms.

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Franquet, Javier Alejandro, Viraj Nitin Telang, Hayat Abdi Ibrahim Jibar et Karem Alejandra Khan. « Multiple In-Situ Stress Measurements in Carbonate Reservoirs for CO2 Injection Capability Assessment and Far-Field Strain Calibrations ». Dans SPE International Hydraulic Fracturing Technology Conference & Exhibition. SPE, 2022. http://dx.doi.org/10.2118/205261-ms.

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Abstract The scope of this work is to measure downhole fracture-initiation pressures in multiple carbonate reservoirs located onshore about 50 km from Abu Dhabi city. The objective of characterizing formation breakdown across several reservoirs is to quantify the maximum gas and CO2 injection capacity on each reservoir layer for pressure maintenance and enhance oil recovery operations. This study also acquires pore pressure and fracture closure pressure measurements for calibrating the geomechanical in-situ stress model and far-field lateral strain boundary conditions. Several single-probe pressure drawdown and straddle packer microfrac injection tests provide accurate downhole measurements of reservoir pore pressure, fracture initiation, reopening and fracture closure pressures. These tests are achieved using a wireline or pipe-conveyed straddle packer logging tool capable to isolate 3 feet of openhole formation in a vertical pilot hole across five Lower Cretaceous carbonate reservoirs zones. The fracture closure pressures are obtained from three decline methods during the pressure fall-off after fracture propagation injection cycle. The three methods are: (1) square-root of the shut-in time, (2) G-Function pressure derivative, and (3) Log-Log pressure derivative. The far-field strain values are estimated by multi-variable regression from the microfrac test data and the core-calibrated static elastic properties of the formations where the stress tests are done. The reservoir pressure across these carbonate formations are between 0.48 to 0.5 psi/ft with a value repeatability of 0.05 psi among build-up tests and 0.05 psi/min of pressure stability. The formation breakdown pressures are obtained between 0.97 and 1.12 psi/ft over 5,500 psi above hydrostatic pressure. The in-situ fracture closure measurements provide the magnitude of the minimum horizontal stress 0.74 - 0.83 psi/ft which is used to back-calculate the lateral strain values (0.15 and 0.72 mStrain) as far-field boundary condition for subsequent geomechanical modeling. These measurements provide critical subsurface information to accurately predict wellbore stability, hydraulic fracture containment and CO2 injection capacity for effective enhance oil recovery within these reservoirs. This in-situ stress wellbore data represents the first of its kind in the field allowing petroleum and reservoir engineers to optimize the subsurface injection plans for efficient field developing.
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Bryant, Eric C., Jongsoo Hwang et Mukul M. Sharma. « Arbitrary Fracture Propagation in Heterogeneous Poroelastic Formations Using a Finite Volume-Based Cohesive Zone Model ». Dans SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173374-ms.

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Abstract A finite volume-based arbitrary fracture propagation model is used to simulate fracture growth and geomechanical stresses during hydraulic fracture treatments. Single-phase flow, poroelastic displacement, and in-situ stress tensor equations are coupled within a poroelastic reservoir domain, using a fixed-strain split assumption. The domain is idealized as two-dimensional and plane-strain, with heterogeneous elastic material and fracture toughness properties. Fracture propagation proceeds by failure along finite volume cells in excess of a threshold effective stress. The cohesive zone model (CZM) is used to simulate propagation of non-planar fractures in heterogeneous porous media under uniform, anisotropic stresses. In addition the model computes the stress field and the pore pressure in the rock matrix to account for stress interference effects. This allows us to estimate the simulated micro-seismic signature of the rock during fracturing. Results show that the presence of bedding planes or planes of weakness in the rock can lead to complex fracture trajectories. The growth of multiple, non-intersecting, competing fractures is also simulated. It is shown that the fracture geometry obtained using this model is highly dependent on the pattern of heterogeneity. For homogeneous reservoirs and a high in-situ stress contrast, planar fractures are obtained. As the stress contrast is decreased and the degree of heterogeneity is increased, fracture complexity increases. Results for different kinds and levels of formation heterogeneity; planes-of-weakness such as bedding planes or natural fracture networks, and layers with different mechanical properties are presented. This model allows for first-of-kind simulation of fracture propagation with arbitrary geometry in a poroelastic solid domain, using proven computational finite volume methods (FVM). The effect of fluid backpressure, mechanical stress shadow effects, and formation heterogeneity are accounted for. The importance of critical stresses on fracture path is discussed.
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Lecampion, B., J. Desroches, X. Weng, J. Burghardt et J. E. E. Brown. « Can We Engineer Better Multistage Horizontal Completions ? Evidence of the Importance of Near-wellbore Fracture Geometry from Theory, Lab and Field Experiments ». Dans SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173363-ms.

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Abstract There is accepted evidence that multistage fracturing of horizontal wells in shale reservoirs results in significant production variation from perforation cluster to perforation cluster. Typically, between 30 and 40% of the clusters do not significantly contribute to production while the majority of the production comes from only 20 to 30% of the clusters. Based on numerical modeling, laboratory and field experiments, we investigate the process of simultaneously initiating and propagating several hydraulic fractures. In particular, we clarify the interplay between the impact of perforation friction and stress shadow on the stability of the propagation of multiple fractures. We show that a sufficiently large perforation pressure drop (limited entry) can counteract the stress interference between different growing fractures. We also discuss the robustness of the current design practices (cluster location, limited entry) in the presence of characterized stress heterogeneities. Laboratory experiments highlight the complexity of the fracture geometry in the near-wellbore region. Such complex fracture path results from local stress perturbations around the well and the perforations, as well as the rock fabric. The fracture complexity (i.e., the merging of multiple fractures and the reorientation towards the preferred far-field fracture plane) induces a strong nonlinear pressure drop on a scale of a few meters. Single entry field experiments in horizontal wells show that this near-wellbore effect is larger in magnitude than perforation friction and is highly variable between clusters, without being predictable. Through a combination of field measurements and modeling, we show that such variability results in a very heterogeneous slurry rate distribution; and therefore, proppant intake between clusters during a stage, even in the presence of limited entry techniques. We also note that the estimated distribution of proppant intake between clusters appears similar to published production log data. We conclude that understanding and accounting for the complex fracture geometry in the near-wellbore is an important missing link to better engineer horizontal well multistage completions.
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McClure, Mark W., Mohsen Babazadeh, Sogo Shiozawa et Jian Huang. « Fully Coupled Hydromechanical Simulation of Hydraulic Fracturing in Three-Dimensional Discrete Fracture Networks ». Dans SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173354-ms.

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Abstract We developed a hydraulic fracturing simulator that implicitly couples fluid flow with the stresses induced by fracture deformation in large, complex, three-dimensional discrete fracture networks. The simulator can describe propagation of hydraulic fractures and opening and shear stimulation of natural fractures. Fracture elements can open or slide, depending on their stress state, fluid pressure, and mechanical properties. Fracture sliding occurs in the direction of maximum resolved shear stress. Nonlinear empirical relations are used to relate normal stress, fracture opening, and fracture sliding to fracture aperture and transmissivity. Fluid leakoff is treated with a semianalytical one-dimensional leakoff model that accounts for changing pressure in the fracture over time. Fracture propagation is treated with linear elastic fracture mechanics. Non-Darcy pressure drop in the fractures due to high flow rate is simulated using Forchheimer's equation. A crossing criterion is implemented that predicts whether propagating hydraulic fractures will cross natural fractures or terminate against them, depending on orientation and stress anisotropy. Height containment of propagating hydraulic fractures between bedding layers can be modeled with a vertically heterogeneous stress field or by explicitly imposing hydraulic fracture height containment as a model assumption. The code is efficient enough to perform field-scale simulations of hydraulic fracturing with a discrete fracture network containing thousands of fractures, using only a single compute node. Limitations of the model are that all fractures must be vertical, the mechanical calculations assume a linearly elastic and homogeneous medium, proppant transport is not included, and the locations of potentially forming hydraulic fractures must be specified in advance. Simulations were performed of a single propagating hydraulic fracture with and without leakoff to validate the code against classical analytical solutions. Field-scale simulations were performed of hydraulic fracturing in a densely naturally fractured formation. The simulations demonstrate how interaction with natural fractures in the formation can help explain the high net pressures, relatively short fracture lengths, and broad regions of microseismicity that are often observed in the field during stimulation in low permeability formations, and which are not predicted by classical hydraulic fracturing models. Depending on input parameters, our simulations predicted a variety of stimulation behaviors, from long hydraulic fractures with minimal leakoff into surrounding fractures to broad regions of dense fracturing with a branching network of many natural and newly formed fractures.
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Daneshy, Ali, Chad Touchet, Fred Hoffman et Mike McKown. « Field Determination of Fracture Propagation Mode Using Downhole Pressure Data ». Dans SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173345-ms.

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Abstract This paper presents the analysis results of 60 single stage fracturing treatments performed in a horizontal well using cemented casing sleeves and a coiled tubing deployed frac isolation system as the completion method. In this carefully set-up and executed treatment, separation between the toe stages was 97 feet, and near the heel it was 55 feet. Pressure data was collected above and below the retrievable plug used for stage isolation. This data was used for analysis of fracturing treatment data which included mode of propagation, completion efficiency, and a rough estimate of fracture orientation. The analysis showed that; There was no interaction between adjacent fractures during five of the sixty fracturing stages. None of these was in the well interval with shorter fracture spacingFracture shadowing occurred during six fracture stages, again none in the shorter spacing intervalMinor cement defects (micro-annuli) caused some fluid migration into the passive segment of the well. This happened in 27 stages. Of these; In eleven cases the cement defects were plugged after a while, causing the migration of fracturing fluid into the passive interval to stop.In sixteen other cases the fluid migration through cement micro-annuli continued during fracturing.During ten stages, defective zone isolation and fluid migration caused a pressure increase of several hundred psi in the passive segment of the well. But this did not result in extension of passive fractures.The volume of migrated slurry due to inadequate zone isolation was mostly a very small fraction of the injected volume.During five stages poor cement quality hampered stage isolation and caused immediate link between adjacent active and passive intervals and extension of passive fractures.The data indicate possible connection between the active and one passive fracture in four stages.Shorter spacing between stages increased the incidents of fluid migration due to poor cement qualityThe fracturing pressure variations during the treatments did not indicate presence of large stress shadowingA rough estimation of fracture orientation indicates that they were likely to be vertical and nearly perpendicular to the wellbore.The fracture growth pattern can best be described as off-balance. To our knowledge, this is the first time existence of direct communication between adjacent fractures has been observed through actual pressure interference data.
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Al Zadjali, Ruqaiya, Sandeep Mahaja et Mathieu M. Molenaar. « Improved Efficiency and Reliability of Hydraulic Fracture Modeling and Design with Standardized Stress Inputs for South Oil Fields in Sultanate of Oman ». Dans SPE International Hydraulic Fracturing Technology Conference & Exhibition. SPE, 2022. http://dx.doi.org/10.2118/205283-ms.

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Abstract Hydraulic Fracturing (HF) is widely used in PDO in low permeability tight gas formations to enhance production. The application of HF has been expanded to the Oil South as conventional practice in enhancing the recovery and production at lower cost. HF stimulation is used in a number of prospects in the south Oman, targeting sandstone formations such as Gharif, Al Khlata, Karim and Khaleel, most of which have undergone depletion. Fracture dimension are influenced by a combination of operational, well design and subsurface parameters such as injected fluid properties, injection rate, well inclination and azimuth, rock mechanical properties, formation stresses (i.e. fracture pressures) etc. Accurate fracture pressure estimate in HF design and modeling improves reliability of HF placement, which is the key for improved production performance of HF. HF treatments in the studied fields provide large volumes of valuable data. Developing standardized tables and charts can streamline the process to generate input parameters for HF modeling and design in an efficient and consistent manner. Results of the study can assist with developing guidelines and workflow and for HF operations. Field HF data from more than 100 wells in south Oman fields were analyzed to derive the magnitude of breakdown pressure (BP), Fracture Breakdown Pressure (FBP), Instantaneous Shut-In Pressure (ISIP) pressure, and Fracture Closure Pressure (FCP) and develop input correlations for HF design. Estimated initial FCP (in-situ pore pressure conditions) is in the range of 15.6 - 16 kPa/mTVD at reservoir formation pressure gradient of about 10.8 kPa/m TVD bdf. However, most of the fields have undergone variable degree of depletion prior to the HF operation. Horizontal stresses in the reservoir decrease with depletion, it is therefore important to assess the reduction of FCP with reduction in pore pressure (stress depletion). Depletion stress path coefficient (i.e. change on FCP as a fraction of change in pore pressure) was derived based on historic field data and used to predict reduction of FCP as a function of future depletion. Data from this field indicates that the magnitude of decrease in fracture pressure is about 50% of the pore pressure change. Based on the data analysis of available HF data, standardized charts and tables were developed to estimate FCP, FBP, and ISIP values. Ratios of FBP and ISIP to FCP were computed to establish trend with depth to provide inputs to HF planning and design. Results indicate FBP/FCP ratio ranges between 1.24-1.35 and ISIP/FCP ratio ranges between 1.1 to 1.2. Developed workflow and standardized tables, charts and trends provide reliable predictions inputs for HF modeling and design. Incorporating these data can be leveraged to optimize parameters for HF design and modeling for future wells.
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Rapports d'organisations sur le sujet "Stress and fracturing field"

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Larochelle, S., Y. Liu et H. Kao. Poroelastic modeling of hydraulic fracturing induced earthquake stress field. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2016. http://dx.doi.org/10.4095/297811.

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Wemple, R. P., et D. B. Longcope. Thermal stress fracturing of magma simulant materials. Office of Scientific and Technical Information (OSTI), octobre 1986. http://dx.doi.org/10.2172/7049178.

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Raymond L. Mazza. FIELD TESTING & ; OPTIMIZATION OF CO2/SAND FRACTURING TECHNOLOGY. Office of Scientific and Technical Information (OSTI), novembre 2004. http://dx.doi.org/10.2172/837843.

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McLellan, P. In - Situ Stress Magnitudes From Hydraulic Fracturing Treatment Records : a Feasibility Study. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1989. http://dx.doi.org/10.4095/130531.

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Mukul M. Sharma. ADVANCED FRACTURING TECHNOLOGY FOR TIGHT GAS : AN EAST TEXAS FIELD DEMONSTRATION. Office of Scientific and Technical Information (OSTI), mars 2005. http://dx.doi.org/10.2172/861428.

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DeGiorgi, Virginia G. Stress Field Variations during Dynamic Loading. Fort Belvoir, VA : Defense Technical Information Center, octobre 1991. http://dx.doi.org/10.21236/ada242121.

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Wilmer, R., N. R. Warpinski, T. B. Wright, P. T. Branagan et J. E. Fix. Application of microseismic technology to hydraulic fracture diagnostics : GRI/DOE Field Fracturing Multi-Sites Project. Office of Scientific and Technical Information (OSTI), juin 1995. http://dx.doi.org/10.2172/70173.

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Girrens, S. P., J. G. Bennett et D. M. Murphy. Poloidal field coil stress analysis for the ZTH machine. Office of Scientific and Technical Information (OSTI), février 1988. http://dx.doi.org/10.2172/6986062.

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Castillo, D. A. ,., et L. W. Younker. A High shear stress segment along the San Andreas Fault : Inferences based on near-field stress direction and stress magnitude observations in the Carrizo Plain Area. Office of Scientific and Technical Information (OSTI), janvier 1997. http://dx.doi.org/10.2172/490160.

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Boutros, Karim. Investigation of Lattice and Thermal Stress in GaN/A1GaN Field-Effect Transistors. Fort Belvoir, VA : Defense Technical Information Center, octobre 2006. http://dx.doi.org/10.21236/ada456241.

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