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Journal articles on the topic 'Stress and fracturing field'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

Liu, Honglei, Jiangling Hong, Wei Shu, et al. "Study on Evolution of Stress Field and Fracture Propagation Laws for Re-Fracturing of Volcanic Rock." Processes 13, no. 8 (2025): 2346. https://doi.org/10.3390/pr13082346.

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In the Kelameili volcanic gas reservoir, primary hydraulic fracturing treatments in some wells take place on a limited scale, resulting in a rapid decline in production post stimulation and necessitating re-fracturing operations. However, prolonged production has led to a significant evolution in the in situ stress field, which complicates the design of re-fracturing parameters. To address this, this study adopts an integrated geology–engineering approach to develop a formation-specific geomechanical model, using rock mechanical test results and well-log inversion to reconstruct the reservoir’

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2

Zhang, Lin-Peng, Tuan Gu, Bin Li, and Peng Zheng. "Research on the Interaction Mechanism of Multi-Fracture Propagation in Hydraulic Fracturing." Processes 12, no. 5 (2024): 1040. http://dx.doi.org/10.3390/pr12051040.

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During the hydraulic-fracturing process, stress interference occurs among multiple wells and fractures, potentially affecting the trajectory of hydraulic fracture propagation. Previous studies have largely overlooked the influence of proppant support stresses on the trajectories of fracture propagation. This paper establishes a mathematical model, grounded in the boundary element method, designed to compute the propagation of multiple fractures, considering both proppant support on the fracture surface and dynamic perturbations within the local stress field. The findings of this research revea

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3

Feng, Yan Jun, and Xiu Wei Shi. "Hydraulic Fracturing Process: Roles of In Situ Stress and Rock Strength." Advanced Materials Research 616-618 (December 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

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4

Zhao, Wan Chun, Chen Wang, Ting Ting Wang, and Bing Guan. "Calculation Model Study on Damaging Stress of Hydraulically Created Fracture Propagation." Applied Mechanics and Materials 275-277 (January 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 m

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5

Wang, Shuanlin, and 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 (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 bore

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6

Zeng, Zhengwen. "Frac-n-Flow Testing to Screen Brittle Fracture Stages in Wolfcamp Formation, Permian Basin, USA." Energies 14, no. 17 (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

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7

Chang, Muhsiung, and Ren-Chung Huang. "Observations of hydraulic fracturing in soils through field testing and numerical simulations." Canadian Geotechnical Journal 53, no. 2 (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 t

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8

Meng, Wei, and 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 (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 gradient

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9

Zhang, Hao-yu, Jun-bin Chen, and Yang Wang. "An XFEM-based CZM Numerical Strategy for Modeling Hydraulic Fracture Propagation under Different Fracturing Schemes." Journal of Physics: Conference Series 2594, no. 1 (2023): 012025. http://dx.doi.org/10.1088/1742-6596/2594/1/012025.

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Abstract Segmented and cluster fracturing can improve the efficiency of volume stimulation in shale reservoirs and reduce construction costs. It is important to clarify the propagation characteristics of hydraulic fractures and stress interference under different fracturing techniques to optimize the process of clustered and staged fracturing. For this purpose, we have developed a 2D XFEM-based CZM hydraulic fracturing model. The capability of this model was validated by analytical solutions and then used to study the propagation paths of hydraulic fractures and the characteristics of stress i

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10

Lu, Cong, Li Ma, Jianchun Guo, et al. "Fracture Parameters Optimization and Field Application in Low-Permeability Sandstone Reservoirs under Fracturing Flooding Conditions." Processes 11, no. 1 (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 producti

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11

Meng, Wenbo, Yan Jin, Yunhu Lu, Guanlong Ren, and Shiming Wei. "Research and Application of Fracturing Testing Technology in a South-West Weizhou Oilfield Shale Oil Exploration Well." Energies 18, no. 8 (2025): 2007. https://doi.org/10.3390/en18082007.

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A numerical analysis model for sand-mudstone interbedded fracturing based on field application in South China is presented in this paper. The proposed model can analyze the influence laws of different longitudinal lithology changes, stress difference changes, different interlayer positions, and fracturing fluid construction parameters on fracture characteristics. Based on the study of fracture characteristics of low-modulus mudstone, a set of layered stress loading experimental devices was independently designed and developed. Experimental analysis shows that the stress difference has a limite

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12

Feng, Jing, Qian Sheng, Chao Wen Luo, and Jing Zeng. "The Application of Hydraulic Fracturing in Storage Projects of Liquefied Petroleum Gas." Key Engineering Materials 306-308 (March 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 syste

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13

Cai, Xiaojun, Weixuan Zhao, Tianbao Hu, Xinwei Du, Haiyang Wang, and Xiong Liu. "Study on the Interaction Propagation Mechanism of Inter-Cluster Fractures under Different Fracturing Sequences." Processes 12, no. 5 (2024): 971. http://dx.doi.org/10.3390/pr12050971.

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Horizontal-well multi-cluster fracturing is one of the most important techniques for increasing the recovery rate in unconventional oil and gas reservoir development. However, under the influence of complex induced stress fields, the mechanism of interaction and propagation of fractures within each segment remains unclear. In this study, based on rock fracture criteria, combined with the boundary element displacement discontinuity method, a two-dimensional numerical simulation model of hydraulic fracturing crack propagation in a planar plane was established. Using this model, the interaction a

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14

Fu, Jun Hui, Guang Cai Wen, Fu Jin Lin, Hai Tao Sun, Ri Fu Li, and Wen Bin Wu. "Coal Mine Hydraulic Fracturing Underground Drainage Research and Engineering Application." Applied Mechanics and Materials 863 (February 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 M

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15

Liu, Erhu, Desheng Zhou, Xu Su, Haiyang Wang, Xiong Liu, and Jinze Xu. "Research on Fluid–Solid Coupling Mechanism around Openhole Wellbore under Transient Seepage Conditions." Processes 12, no. 2 (2024): 412. http://dx.doi.org/10.3390/pr12020412.

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Hydraulic fracturing is one of the most important enhanced oil recovery technologies currently used to develop unconventional oil and gas reservoirs. During hydraulic fracture initiation, fluid seeps into the reservoir rocks surrounding the wellbore, inducing rock deformation and changes in the stress field. Analyzing the fluid–solid coupling mechanism around the wellbore is crucial to the construction design of fracturing technologies such as pulse fracturing and supercritical carbon dioxide fracturing. In this study, a new transient fluid–solid coupling model, capable of simulating the pore

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16

He, QiangSheng, and Chuang Liu. "Phase Field Modeling of Multiple Fracture Growth in Natural Fractured Reservoirs." Geofluids 2023 (March 4, 2023): 1–22. http://dx.doi.org/10.1155/2023/4846474.

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In recent years, hydraulic fracturing techniques have been widely used in extracting unconventional reservoir resources. During multicluster fracturing process, the stress shadowing effect can lead to a nonuniform distribution of fracturing fluid. In this paper, a two-dimensional multiple fracture propagation model is developed based on phase field method considering the distribution of fracturing fluid within each fracture during fracturing process. The distribution of fracturing fluid injected into each fracture is calculated through solving governing equations of perforation friction as wel

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17

Liang, Hongbo, Penghu Bao, Gang Hui, et al. "Simulation Study of Refracturing of Shale Oil Horizontal Wells Under the Effect of Multi-Field Reconfiguration." Processes 13, no. 6 (2025): 1915. https://doi.org/10.3390/pr13061915.

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The mechanisms underlying formation energy depletion after initial fracturing and post-refracturing production decline in shale oil horizontal wells remain poorly understood. This study proposes a novel numerical simulation framework for refracturing processes based on a three-dimensional fully coupled hydromechanical model. By dynamically reconfiguring the in situ stress field through integration of production data from initial fracturing stages, our approach enables precise control over fracture propagation trajectories and intensities, thereby enhancing reservoir stimulation volume (RSV) an

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18

Yin, Hongcheng, Lan Ren, Changyong Guo, et al. "Research on the Mechanism and Prevention Countermeasures of Stuck Coiled Tubing During Coiled Tubing Fracturing in the Junggar Basin." Processes 13, no. 3 (2025): 701. https://doi.org/10.3390/pr13030701.

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The coiled tubing (CT) fracturing technology offers advantages such as pressurized dragging operation and maintaining a large borehole diameter after fracturing. However, during fracturing in the conglomerate and volcanic rock reservoirs of the Junggar Basin, CT stuck during retrieval occurs frequently. In this study, a model simulating the variation in the in situ stress field during CT hydraulic fracturing is established based on elastic mechanics and the displacement discontinuity method (DDM). Based on the geological characteristics of conglomerate and volcanic rock reservoirs in the Jungg

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19

Gong, Diguang, Junbin Chen, Cheng Cheng, Yuanyuan Kou, Haiyan Jiang, and Jianhong Zhu. "Numerical Simulation on Radial Well Deflagration Fracturing Based on Phase Field Method." Energies 16, no. 12 (2023): 4758. http://dx.doi.org/10.3390/en16124758.

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A radial well has a unique wellbore configuration. Fracture propagation in radial well deflagration fracturing is studied rarely. The mechanism of interaction between deflagration fractures, natural fractures, and micro-fractures is still unknown. Based on continuum mechanics, damage mechanics, and variational principles, a numerical model of fracture propagation in deflagration fracturing is established with the Hamilton principle and phase-field fracture theory. The effects of horizontal principal stress difference, natural fracture distribution, and micro-fractures around the wellbore on fr

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20

Zhang, Zuxun, Hongtu Wang, Bozhi Deng, Minghui Li, and 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 (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 high

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21

Li, Jun, Xueli Guo, Gonghui Liu, Shuoqiong Liu, and Yan Xi. "New Analytical Method to Evaluate Casing Integrity during Hydraulic Fracturing of Shale Gas Wells." Shock and Vibration 2019 (April 24, 2019): 1–19. http://dx.doi.org/10.1155/2019/4253241.

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An accurate analysis of casing stress distribution and its variation regularities present several challenges during hydraulic fracturing of shale gas wells. In this paper, a new analytical mechanical-thermal coupling method was provided to evaluate casing stress. For this new method, the casing, cement sheath, and formation (CCF) system was divided into three parts such as initial stress field, wellbore disturbance field, and thermal stress field to simulate the processes of drilling, casing, cementing, and fracturing. The analytical results reached a good agreement with a numerical approach a

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22

Yang, Maolin, Shuai Lv, Yu Meng, Xing Wang, Sicheng Wang, and Jiangfu He. "Numerical Investigation of Factors Influencing Multiple Hydraulic Fracture Propagation from Directional Long Boreholes in Coal Seam Roofs." Applied Sciences 15, no. 12 (2025): 6521. https://doi.org/10.3390/app15126521.

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The hanging of hard roofs in coal seams poses a significant threat to the safe mining of coal. Hydraulic fracturing is an important method to achieve the pre-weakening of coal seam roofs. Clarifying the scope of hydraulic fracturing in coal seam roofs and its influencing factors is a prerequisite for ensuring the effectiveness of the pre-weakening process. In this paper, we developed a fluid–structure coupling numerical simulation model for hydraulic fracturing based on the element damage theory, and have systematically examined the effects of both engineering parameters and geological factors

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23

Zhang, Xiaojun, Jun Li, Yuxuan Zhao, et al. "Mechanism of Casing Deformation of Shale Gas Platform Wells in Luzhou Block Before Fracturing and Countermeasures for Prevention and Control." Processes 13, no. 2 (2025): 479. https://doi.org/10.3390/pr13020479.

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The deep shale gas resources in the Luzhou area of the southern Sichuan Basin are abundant and have been identified as a key replacement field for natural gas development following the medium-to-shallow shale gas fields in Changning and Weiyuan. However, the frequent occurrence of “pre-deformation without fracturing” in horizontal wells has significantly restricted large-scale production. In this study, the Lu203 and Yang101 well areas were analyzed to investigate the characteristics of casing deformation and the correlation with faults and natural fractures (fracture systems). A numerical mod

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Weng, Dingwei, Zeyuan Ma, Zhuhong Tian, et al. "Simulation Optimization on Multi-Well Fracturing Sequence of Chang 7 Formation." Journal of Physics: Conference Series 2755, no. 1 (2024): 012033. http://dx.doi.org/10.1088/1742-6596/2755/1/012033.

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Abstract In order to study the engineering problems of shale oil horizontal well platform fracturing mode, a three-dimensional geological model and a three-dimensional geomechanical model were constructed according to the characteristics of Chang 7 section in Ordos Basin. The fracture propagation under different well spacing, cluster spacing, and fracturing sequence was simulated. The PEBI grid was used to refine the local grid of the fractures and predict the performance of the multi-well pad. The finite element model was used to analyze the change of induced stress field. The numerical simul

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Yang, Bing, Qianqian Ren, Hai Huang, et al. "Fracture Evolution during CO2 Fracturing in Unconventional Formations: A Simulation Study Using the Phase Field Method." Processes 12, no. 8 (2024): 1682. http://dx.doi.org/10.3390/pr12081682.

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With the introduction of China’s “dual carbon” goals, CO2 is increasingly valued as a resource and is being utilized in unconventional oil and gas development. Its application in fracturing operations shows promising prospects, enabling efficient extraction of oil and gas while facilitating carbon sequestration. The process of reservoir stimulation using CO2 fracturing is complex, involving coupled phenomena such as temperature variations, fluid behavior, and rock mechanics. Currently, numerous scholars have conducted fracturing experiments to explore the mechanisms of supercritical CO2 (SC-CO

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Yang, Lusheng, Yujing Ma, Gengyin Yang, et al. "Phase Field Modeling of Hydraulic Fracturing with Length-Scale Insensitive Degradation Functions." Energies 17, no. 20 (2024): 5210. http://dx.doi.org/10.3390/en17205210.

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A length-scale insensitive degradation function is applied to extend the cracks during hydraulic fracturing under stress boundary conditions in this study. The phase field method is an effective modeling technique that has great potential for use in hydraulic fracturing. Nonetheless, current hydraulic fracturing research is still concentrated on small scales. The phase field model employs a degradation function that is insensitive to length scale, allowing for the decoupling of the phase field length scale from the physical length scale. This facilitates the simulation of hydraulic fracturing

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Zhang, Yongjiang, Benqing Yuan, and Xingang Niu. "Response Characteristics of Coal-Like Material Subjected to Repeated Hydraulic Fracturing: An Evaluation Based on Real-Time Monitoring of Water Injection Pressure and Roof Stress Distribution." Shock and Vibration 2021 (May 27, 2021): 1–10. http://dx.doi.org/10.1155/2021/9931137.

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Conventional hydraulic fracturing has several disadvantages, including a short effective extraction time and low fracture conductivity during long-term extraction. Aiming at overcoming these shortcomings, a similar simulation test of repeated hydraulic fracturing was conducted in this study, and the evolutionary rules regarding the injection water pressure and stress distribution of the coal seam roof during this repeated hydraulic fracturing were revealed. The research results show that after multiple hydraulic fracturing, the number of cracks in the coal seam and the range of fracturing infl

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Novikova, Elena V., Mariia A. Trimonova, Sergey B. Turuntaev, Evgeny V. Zenchenko, and Petr E. Zenchenko. "Backstress Influence on the Formation Stress Field in Hydraulic Fracturing Experiments." Geosciences 13, no. 6 (2023): 153. http://dx.doi.org/10.3390/geosciences13060153.

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This work presents an analysis of data obtained through unique laboratory experiments on hydraulic fracturing. In the experiments, sufficiently large artificial samples were used to model a reservoir. Thus, it was possible to simulate several wells simultaneously, given that hydraulic fracture was initiated in one of them. In addition, the setup construction provided a true triaxial stress–strain state. The setup allowed us to investigate parameters that are difficult to access in real conditions. The data processing based on six laboratory experiments on hydraulic fracturing showed discrepanc

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Men, Xinyang, Shu Tao, Shida Chen, Heng Wu, and Bin Zhang. "Impacts and Countermeasures of Present-Day Stress State and Geological Conditions on Coal Reservoir Development in Shizhuang South Block, Qinshui Basin." Energies 17, no. 17 (2024): 4221. http://dx.doi.org/10.3390/en17174221.

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This study investigates the reservoir physical properties, present-day stress, hydraulic fracturing, and production capacity of No. 3 coal in the Shizhuang south block, Qinshui Basin. It analyzes the control of in situ stress on permeability and hydraulic fracturing, as well as the influence of geo-engineering parameters on coalbed methane (CBM) production capacity. Presently, the direction of maximum horizontal stress is northeast–southwest, with local variations. The stress magnitude increases with burial depth, while the stress gradient decreases. The stress field of strike-slip faults is d

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Qi, Fuzhou, Zhanguo Ma, Dangwei Yang, et al. "Stability Control Mechanism of High-Stress Roadway Surrounding Rock by Roof Fracturing and Rock Mass Filling." Advances in Civil Engineering 2021 (February 28, 2021): 1–17. http://dx.doi.org/10.1155/2021/6658317.

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Large deformation of roadway and coal bump failures have always been the focus in deep underground engineering. By considering the Lu’an mining district in China, the failure mode and stability improvement process of high-stress roadways were analysed with the field tests and numerical simulations. The field test results showed that a great amount of deformation and serious damage occurred in surrounding rocks during panel retreat due to the suspended roof. A novel approach employing roof fracturing and collapsed rock filling effect was adopted to maintain the roadway stability. A numerical mo

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Zhang, Yan Xin, Chang Sheng Song, and Jian Hui Zhao. "Study on Hydraulic Fracturing Method for In Situ Stress Measurement in Deep Boreholes." Applied Mechanics and Materials 741 (March 2015): 567–71. http://dx.doi.org/10.4028/www.scientific.net/amm.741.567.

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Information of in situ stress field is crucial for predicting the response of rock masses to the disturbance associated with underground constructions. Hydraulic fracturing is an efficient method for determining the stress field and is suitable at the early stages of projects when no underground access exists. For this, a series of new improved techniques and equipments are developed for the deep boreholes to increase the reliability of system. For a better understanding of the stress test, the ideal HF pressure-time curve is given and the fracturing procedure is analyzed. Based on the theory

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Pan, Chao, Yu Jun Zuo, Shang Gao, and Wei Li. "Numerical Simulation on Hard and Stable Roof Control by Means of Directional Hydraulic Fracturing in Coal Mine." Applied Mechanics and Materials 638-640 (September 2014): 894–97. http://dx.doi.org/10.4028/www.scientific.net/amm.638-640.894.

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Hydraulic fracturing is a method which combines a natural action with a factitious means to alter rock structure. In order to control the extending direction of fracture in the process of hydraulic fracturing, directional hydraulic fracturing is necessary. According to fracture initiation and extension mechanism, taking fully into account the flow-stress-damage coupling effect, simulating with numerical way and analyzing a law of the roof under the dynamic failure process on a working face with a hard and stable roof in 2 cases, the one is the non-directional directional hydraulic fracturing,

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Yang, Shouguo, Ning Xu, and Xiaofei Zhang. "Numerical Simulation Study on the Evolution Law of Stress and Crack in Coal Seam Hydraulic Fracturing." Sustainability 15, no. 14 (2023): 11351. http://dx.doi.org/10.3390/su151411351.

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Hydraulic fracturing as a conventional reservoir permeability enhancement technique can effectively increase the production of coalbed methane, and it is important to study the stress and crack evolution law to evaluate the effect of coalbed fracturing and optimize the construction process. To accurately derive the evolution characteristics of stress and the propagation form of cracks during hydraulic fracturing of coal seams, a numerical model of hydraulic fracturing was established based on a three-point bending test of coal samples using the finite-discrete element method (FDEM). Based on a

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Li, Hongyan, Yaolong Li, Weihua Wang, et al. "Study on the Damage Mechanism of Coal under Hydraulic Load." Processes 12, no. 5 (2024): 925. http://dx.doi.org/10.3390/pr12050925.

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Hydraulic fracturing is extensively utilized for the prevention and control of gas outbursts and rockbursts in the deep sections of coal mines. The determination of fracturing construction parameters based on the coal seam conditions and stress environments merits further investigation. This paper constructs a damage analysis model for coal under hydraulic loads, factoring in the influence of the intermediate principal stress, grounded in the unified strength theory analysis approach. It deduces the theoretical analytical equation for the damage distribution of a coal medium subjected to small

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Wu, Xinhua, Tao Zhu, Yufei Liu, Guoyu Zhang, Guanghui Zheng, and Fengnian Wang. "Mechanism of Coal Seam Permeability Enhancement and Gas Outburst Prevention under Hydraulic Fracturing Technology." Geofluids 2022 (March 22, 2022): 1–9. http://dx.doi.org/10.1155/2022/7151851.

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In view of the high gas pressure and low permeability of deep coal seam, it is difficult to control gas, which affects the safety production of coal mine. The technical scheme of hydraulic fracturing to improve the permeability of coal seam is put forward, and the gas drainage technology is used to control the gas emission of coal seam. The fracturing effect under different water pressure, different gradient fracturing times, and in situ stress is analyzed by using 3DEC (3-Dimensional Distinct Element Code) discrete element software. The simulation analysis and field verification results show

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Zhang, Peng, Zhenghua Wu, Shuying Hu, et al. "Stress Characteristics near Wellbore and Prevention Casing Deformation for Fracturing Horizontal Wells." Geofluids 2022 (December 30, 2022): 1–12. http://dx.doi.org/10.1155/2022/3034970.

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Aiming at the problem that casing deformation can easily occur in tight oil horizontal well fracturing, based on the rock mechanics experiments and probability statistics, the distribution characteristics and law of the near-wellbore stress field of the reservoir in STH M56 were solved and analyzed by using the finite element modeling numerical method. The research shows that (1) the max/min horizontal stress ratio of the M56 tight oil reservoir is 1.2, the difference is less than 8 MPa, and this characteristic condition is more conducive to the formation of complex fracturing network in the r

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Fan, Heng, Peihang Liu, Yating Zhao, Shangyu Yang, and Xinbo Zhao. "Analytical Model of Hydraulic Fracturing for Low Permeability Hot Dry Rock Reservoirs and DEM Simulation Base on Fluid-Solid Coupling." Processes 11, no. 4 (2023): 976. http://dx.doi.org/10.3390/pr11040976.

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The formation of a rich underground-seam network is the key problem in the development of low-permeability hot dry rock (HDR) resources. Considering the lack of macroscopic continuum theory to study hydraulic fracturing having preset fracture-interface element, the particle-flow method of micro-mechanical discrete-element theory is introduced to simulate the mechanical behavior of hydraulic fracturing for HDR low permeability reservoirs. The reservoir is simulated as a round particle; the fracturing fluid movement is described by the seepage field equation, and rock movement is described by th

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Chen, Xue Xi, Rui Qing Bi, Wen Guang Jin, and Yong Xu. "Permeability Improvement Technology of Directional Hydraulic Fracturing in Low Permeability." Applied Mechanics and Materials 599-601 (August 2014): 385–90. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.385.

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According to the conventional fracturing could easily lead to the local stress concentration of coal, the effect of pressure relief and permeability improvement is not ideal. The mechanism of directional hydraulic fracturing is analyzed and the parameters such as the layout of directional hole, the fracturing hole sealing, the minimum cracking pressure are discussed, then the field application tests are carried out. The results show that the directional hydraulic fracturing effect is better than that of ordinary fracturing hole and the maximum concentration and the average drainage scalar is r

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Lin, Hai, Yakai Tian, Zhenwei Sun, and Fujian Zhou. "Fracture Interference and Refracturing of Horizontal Wells." Processes 10, no. 5 (2022): 899. http://dx.doi.org/10.3390/pr10050899.

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Due to fracture interference, not all perforations can be fractured, resulting in 20% of fractures contributing to 80% of the total production. The extraction of oil and gas also reduces production, necessitating refracturing. In this study, the finite element method was used to simulate multiple fractures fracturing simultaneously and the stress field distribution was then extracted and applied to a new geological model. This paper explains the effect of stress around the horizontal wellbore on new fractures during the refracturing of old wells using a temporary plugging technique. The result

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Alfat, Sayahdin, Masato Kimura, and Alifian Mahardhika Maulana. "Phase Field Models for Thermal Fracturing and Their Variational Structures." Materials 15, no. 7 (2022): 2571. http://dx.doi.org/10.3390/ma15072571.

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It is often observed that thermal stress enhances crack propagation in materials, and, conversely, crack propagation can contribute to temperature shifts in materials. In this study, we first consider the thermoelasticity model proposed by M. A. Biot and study its energy dissipation property. The Biot thermoelasticity model takes into account the following effects. Thermal expansion and contraction are caused by temperature changes, and, conversely, temperatures decrease in expanding areas but increase in contracting areas. In addition, we examine its thermomechanical properties through severa

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Guo, Wei, Wei Ju, Majia Zheng, et al. "Present-Day In Situ Stress Analysis in Shale Reservoir of Haiba Block, Southern Sichuan Basin, South China." Geofluids 2023 (February 22, 2023): 1–11. http://dx.doi.org/10.1155/2023/3249570.

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Natural gas from shale gas reservoirs has been an important contributor for reserve growth, deliverability construction, and profits growth in natural gas industry in the world. Hydraulic fracturing is commonly required in the shale gas commercial development, and thus understanding the present-day in situ stress field is greatly significant for the hydraulic fracturing and efficient development in shale gas reservoirs. However, there are no systematic investigations on the present-day in situ stress field in the Haiba Block from the Sichuan Basin, South China. In this study, the present-day i

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Tiejun, Lin, Li Zhaoyang, Zhao Zhaoyang, Bao Xiaomin, and Zhang Qiang. "Failure analysis of long round thread in horizontal well casing under multi-axis loading." E3S Web of Conferences 165 (2020): 01007. http://dx.doi.org/10.1051/e3sconf/202016501007.

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The casing is subjected to complicated forces underground, and the threaded joint of the casing is the weak link of the casing. becoming more and more severe, various kinds of failure accidents often occur in practical use. Therefore, in view of the casing thread fracture failure during the process of volumetric fracturing in well W of an oil field. The finite element model of 5-1/2"API casing long round threaded joint was established in this paper, ABAQUS software was used to simulate and analyze the stress and deformation of casing thread under the loading state of overlock, axial tension an

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Zhai, Wen, Yachao Guo, Xiaochuan Ma, et al. "Research on Hydraulic Fracturing Pressure Relief Technology in the Deep High-Stress Roadway for Surrounding Rock Control." Advances in Civil Engineering 2021 (October 25, 2021): 1–13. http://dx.doi.org/10.1155/2021/1217895.

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With the increase of mining depth in underground engineering, deep ground pressure has an extremely unfavorable impact on safety production and the economic benefits of coal mines and the control of the roadway stability in deep mines are gradually highlighted. In this study, the working face 14203 of the Zaoquan coal mine was taken as the engineering background, the deformation mechanism of surrounding rock in the deep-buried high-stress roadway was analyzed, and the hydraulic fracturing pressure relief technology in the advanced roadway was proposed for surrounding rock control. Finally, the

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Iastrebov, Pavel V., Artem S. Prodan, Viktor V. Rodionov, and Alexander S. Ugryumov. "Geomechanical modeling aspects in support of hydraulic fracturing operations." Kazakhstan journal for oil & gas industry 6, no. 3 (2024): 59–71. http://dx.doi.org/10.54859/kjogi108708.

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This paper describes the main aspects and nuances of geomechanical modeling that must be considered when supporting hydraulic fracturing operations and providing engineering support of projects. A key feature of geomechanical modeling for hydraulic fractures aims or self-induced fracturing in mature fields is the estimation of reservoir pressure, particularly in the vicinity of production and injection wells. In addition, this has a significant impact on stress anisotropy, which is the primary factor affecting the geometry of the hydraulic fracture and the surrounding induced stress field. It

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Skulkin, Alexander A. "EXPERIMENTAL DETERMINATION OF STRESS PARAMETERS IN THE MINING FIELD." Interexpo GEO-Siberia 2, no. 4 (2021): 123–29. http://dx.doi.org/10.33764/2618-981x-2021-2-4-123-129.

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The experience of measuring the stress state of the rock mass at the Tashtagol iron ore deposit and the result of stresses acting in the induced field in the vicinity of 10 orts at a depth of 800 m from the daily surface (horizon -350) is presented using the method of measuring hydraulic fracturing. Stress concentration zones around the mine are determined at the measuring station.

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Liu, Xiaoqiang, Zhanqing Qu, Tiankui Guo, and Wenjie Huang. "Numerical simulation of stress field distribution before re-fracturing treatment." IOP Conference Series: Earth and Environmental Science 814, no. 1 (2021): 012008. http://dx.doi.org/10.1088/1755-1315/814/1/012008.

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Cao, Xu, Saisai Wu, and Qingyuan He. "Investigation into Influences of Hydraulic Fracturing for Hard Rock Weakening in Underground Mines." Applied Sciences 14, no. 5 (2024): 1948. http://dx.doi.org/10.3390/app14051948.

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The long overhanging distance of hard roofs and long-collapse steps induces a large area of suspension on the working face in underground coal mines, resulting in excessive pressure and deformation on the surrounding rocks of the adjacent roadway in the work face, which seriously threatens the safety of coal mining operations. In this study, in order to study the hydraulic fracturing effects on hard roofs, numerical simulation and in situ tests were conducted. The analysis and comparison of fracturing effects under different hydraulic fracturing parameters were carried out, and the reasonable

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Guo, Shuaifang, Yunxing Cao, Li Wang, et al. "Confining Stress Response to Hydraulic Fracturing Volumetric Opening on the Representative Volume Element (RVE) Scale." Water 15, no. 23 (2023): 4184. http://dx.doi.org/10.3390/w15234184.

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Confining stress response is considered an accompanying behavior of hydraulic fracturing. Along these lines, an evaluation model of confining stress response was presented in this work. It was established on a rock representative volume element (RVE) and based on the hydraulic volumetric opening model, which stems from the theories of poroelasticity, breakdown damage, and hydraulic fracture mechanics. From the extracted outcomes, it was demonstrated that the confinement of the stress response depends on the matching among the characteristic parameters (εb,εs,m) of the rock breakdown, the volum

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Matayev, Azamat, Sholpan Zeitinova, Ravil Mussin, et al. "Research into mechanical properties of ore and rocks in the ore deposits with assessment of the mass stress state natural field." Mining of Mineral Deposits 18, no. 2 (2024): 71–82. http://dx.doi.org/10.33271/mining18.02.071.

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Purpose. The research aims to conduct a comprehensive study of the mechanical properties of ores and rocks within the Zhilandy Group field, as well as to assess the natural field of mass stress state to solve geomechanical problems in optimizing mining operations. Methods. To determine the boundary conditions when measuring the stress-strain state of the mass, a complex methodology is proposed, including stress measurements using hydraulic fracturing methods of the wells and determining the physical-mechanical properties of rocks. Five rock probes have been tested. Twelve tests (six tests in n

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Gan, Junchong, Ning Qi, Yuyang Shen, and Zhenjun Zhang. "Fracture Propagation Mechanism of Radial Well-Guided Preflush Fluid Acid Fracturing under Injection Discharge Control." Journal of Physics: Conference Series 2503, no. 1 (2023): 012038. http://dx.doi.org/10.1088/1742-6596/2503/1/012038.

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Abstract In view of the low availability of carbonate reservoirs, a radial well-assisted preflush acid fracturing technology is proposed to help communicate oil and gas reservoirs in non-principal stress directions. The acid fracturing model of the auxiliary preflush in the radial well is established by using the extended finite element and the two-scale continuous model. The mechanism of fracture directional propagation under the control of injection discharge is analyzed, and the deflection coefficient is introduced to characterize the guiding effect quantitatively. The effects of different

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