FRACTURES

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Control and prediction of bedding-parallel fractures in fine-grained sedimentary rocks:A case from the Permian Lucaogou Formation in Jimusar Sag,Junggar Basin,Western China
《Petroleum Science》2024年第6期3815-3838,共24页Zhao-Hui Zhang Teng Zhang Hua-Qing Liu Xiang-Bo Li Duo-Nian Xu 
financially supported by the National Natural Science Foundation of China(No.41872116);National Science and Technology Major Project(No.2017ZX05001-003);Initial Scientific Research Foundation of Xinjiang University for Doctor(No.620321016);Research Foundation of Tianchi Outstanding Doctor(No.51052300560)。
The fine-grained sedimentary rocks have numerous bedding-parallel fractures that are essential for the migration,enrichment,and efficient development of oil and gas.However,because of their variety and the complexity ...
关键词：Bedding-parallel fractures Fine-grained sedimentary rocks Multiscale matching Quantitative prediction Lucaogou formation Junggar Basin 
Study of the evolution characteristics of fiber-optic strain induced by the propagation of bedding fractures in hydraulic fracturing
《Petroleum Science》2024年第6期4219-4229,共11页Su Wang Mian Chen Jia-Xin Lv Kun-Peng Zhang Ya-Long Hao Bo-Wen Yao 
the financial support by National Natural Science Foundation of China(No.52334001)。
Shale reservoirs contain numerous bedding fractures,making the formation of complex fracture networks during fracturing a persistent technical challenge in evaluating shale fracture morphology.Distributed optical fibe...
关键词：Distributed fiber-optic sensing Identification of fracture growth Shale reservoir Bedding fractures Fiber-optic strain 
Three-dimensional fracture space characterization and conductivity evolution analysis of induced un-propped fractures in shale gas reservoirs
《Petroleum Science》2024年第6期4248-4261,共14页Bin Yang Wen-Jing Ma Guan-Chang Pan Ke-Liu Wu Ying Zhong Zhang-Xin Chen 
supported by the National Natural Science Youth Foundation of China(No.52104003);the Open Fund of Engineering Research Center of Development and Management for Low to Ultra-Low Permeability Oil&Gas Reservoirs in West China,Ministry of Education(No.KFJJ-XB-2020-5);the Science and Technology Planning Project of Sichuan Province(No.22NSFSC4005);the National Natural Science Foundation of China(No.52274031 and No.52374005);the Natural Science Youth Foundation of Sichuan Province(No.2023NSFSC0930)。
Huge numbers of induced unpropped(IU)fractures are generated near propped fractures during hydraulic fracturing in shale gas reservoirs.But it is still unclear how their fracture space and conductivity evolve under in...
关键词：Gas shale Induced unpropped fractures Surfac easperity Fracture space Stress sensitivity 
Systematic prediction of the gas content, fractures, and brittleness in fractured shale reservoirs with TTI medium
《Petroleum Science》2024年第5期3202-3221,共20页Yun Zhao Xiao-Tao Wen Chen-Long Li Yang Liu Chun-Lan Xie 
financially supported by the Sichuan Science and Technology Program (Grant No. 2023ZYD0158);the National Natural Science Foundation of China (Grant Nos. 42304147 and 42304076)。
The main objective is to optimize the development of shale gas-rich areas by predicting seismic sweet spot parameters in shale reservoirs. We systematically assessed the fracture development, fracture gas content, and...
关键词：Petrophysical modeling Brittleness index Fracture gas indication factor(GFI) Tilted transversely isotropic(TTI) Fracture density 
Fractures interaction and propagation mechanism of multi-cluster fracturing on laminated shale oil reservoir
《Petroleum Science》2024年第4期2600-2613,共14页Jia-Xin Lv Bing Hou 
financial support by the National Key Research and Development Program of China (No.2022YFE0129800);the National Natural Science Foundation of China (No.52074311)。
The continental shale reservoirs of Jurassic Lianggaoshan Formation in Sichuan Basin contain thin lamina,which is characterized by strong plasticity and developed longitudinal shell limestone interlayer.To improve the...
关键词：Laminated shale Multi-cluster fracturing CROSS-LAYER Cohesive zone model Acoustic emission technique 
A semi-analytical pressure and rate transient analysis model for inner boundary and propped fractures exhibiting dynamic behavior under long-term production conditions
《Petroleum Science》2024年第4期2520-2535,共16页Lin-Song Cheng Chong Cao Quan-Yu Pan Pin Jia Ren-Yi Cao Zhi-Kai Wang Jun-Jie Shi 
financial funding of National Natural Science Foundation of China (No.52004307);China National Petroleum Corporation (No.ZLZX2020-02-04);the Science Foundation of China University of Petroleum,Beijing (No.2462018YJRC015)。
The loss of hydrocarbon production caused by the dynamic behavior of the inner boundary and propped fractures under long-term production conditions has been widely reported in recent studies.However,the quantitative r...
关键词：Semi-analytical model Length shrinkage Dynamic behavior Boundary changes Transient behavior 
Influences of shale microstructure on mechanical properties and bedding fractures distribution
《Petroleum Science》2024年第3期1944-1954,共11页Ming-Zhe Gu Mao Sheng Shi-Zhong Cheng Fan-Hao Gong Gen-Sheng Li 
financially supported by the National Natural Science Foundation of China(Grant Nos.52074315&U19B6003)。
The difference in microstructure leads to the diversity of shale mechanical properties and bedding fractures distribution patterns.In this paper,the microstructure and mechanical properties of Longmaxi marine shale an...
关键词：SHALE NANOINDENTATION MICROSTRUCTURE Mechanical property Fracture 
Development characteristics and controlling factors of fractures in lacustrine shale and their geological significance for evaluating shale oil sweet spots in the third member of the Shahejie Formation in the Qikou Sag, Bohai Bay Basin
《Petroleum Science》2024年第2期791-805,共15页Xu Zeng Tao Yang Jian-Wei Feng Cong-Sheng Bian Ming Guan Wei Liu Bing-Cheng Guo Jin Dong 
financially supported by the CNPC Prospective Basic Science and Technology Special Project(2023ZZ08);the Science and Technology Cooperation Project of the CNPC-SWPU Innovation Alliance(2020CX050103)。
Natural fractures are critical for shale oil and gas enrichment and development. Due to the extremely high heterogeneity of shale, the factors controlling the formation of internal fractures, especially horizontal fra...
关键词：FRACTURES Development characteristics Controlling factors Shale oil Sweet spot 
Insights into in-situ imbibition behavior of fracturing fluid in propped shale fractures based on nuclear magnetic resonance:A case study from Longmaxi Formation shale,Sichuan Basin,China
《Petroleum Science》2024年第1期410-429,共20页Jing-Jing Guo Kai-Xiang Di Lie-Hui Zhang Yu-Long Zhao Hui-Ying Tang Rui-Han Zhang Ye Tian 
The authors gratefully acknowledge the support of the National Natural Science Foundation of China(Grant Nos.52174036,51774243,51904257,51874251);the Sichuan Province Science and Technology Program(Grant Nos.2021YJ0345,2022JDJQ0009,2022NSFSC0186).
Shale gas is an important component of unconventional oil and gas resources.Studying the imbibition behavior is helpful to optimize flowback parameters and enhance gas recovery.Recent imbibition studies have focused o...
关键词：Forced imbibition Migration SOAKING NMR T_(2)spectra Propped fracture Permeability recovery 
P-and SV-wave dispersion and attenuation in saturated microcracked porous rock with aligned penny-shaped fractures
《Petroleum Science》2024年第1期143-161,共19页Sheng-Qing Li Wen-Hao Wang Yuan-Da Su Jun-Xin Guo Xiao-Ming Tang 
This work was supported by the Laoshan National Laboratory Science and Technology Innovation Project(No.LSKJ202203407);the National Natural Science Foundation of China(Grant Nos.42174145,41821002,42274146);Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology(2022B1212010002);Shenzhen Stable Support Plan Program for Higher Education Institutions(20220815110144003).
P-and SV-wave dispersion and attenuation have been extensively investigated in saturated poroelastic media with aligned fractures.However,there are few existing models that incorporate the multiple wave attenuation me...
关键词：Aligned fractures P-and SV-wave Dispersion and attenuation Microcracked porous background FB-WIFF Elastic scattering Squirt flow 
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