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Quantitative Analysis of Anisotropy Effect on Hydrofracturing Efficiency and Process in Shale Using X-Ray Computed Tomography and Acoustic Emission

文献类型：期刊论文

作者Guo, Peng1,2,3; Li, Xiao1,2,3; Li, Shouding1,2,3; Yang, Wencheng1,3; Wu, Yanfang1,3; Li, Guanfang1,3
刊名ROCK MECHANICS AND ROCK ENGINEERING
出版日期2021-07-29
页码16
关键词Shale Hydrofracturing efficiency Bedding inclination Stress contrast Fracture process
ISSN号0723-2632
DOI10.1007/s00603-021-02589-7
英文摘要Hydrofracturing technology has become successful in enhancing the permeability of shale gas reservoirs. However, given the geological complexity in the subsurface, considerable challenges remain in quantitatively analyzing the hydrofracture geometry and understanding the anisotropic fracture process. To investigate, we conducted hydrofracturing tests through a horizontal borehole in shale core samples to simulate a horizontal fracturing stimulation. Based on the X-ray computed tomography scanning and fracture geometry reconstruction results, a new quantification method was established to evaluate the effect of bedding inclination and stress contrast on hydrofracturing efficiency. We concluded that the complex fracture network with higher stimulation index could be created at bedding inclinations of 0 degrees-30 degrees and stress contrast of 10 MPa. In this scenario, the fracturing process presented distinctive stages of fracture initiation, propagation, thoroughgoing failure, and stable seepage. The main fracture propagation in arrester mode would require higher fluid pressure, generate a complex fracture pathway, and a larger amount of acoustic emission amplitude, energy, and events. Also, the time from fracture initiation to physical breakdown was relatively long due to the branching of the main fracture into the weak beddings. With the increase in bedding inclination, the fracturing mode gradually changed from arrester to short transverse. The fracturing process was becoming instant, which was accompanied by a lower breakdown pressure, short acoustic emission response, and simple fracture geometry. The understanding of anisotropic fracture process and evaluation method are of interest in shale reservoir fracturing engineering and academic applications.
WOS关键词HYDRAULIC FRACTURE INITIATION ; GAS-RESERVOIR ; PROPAGATION ; BEHAVIOR ; NETWORK ; PRESSURE
资助项目National Natural Science Foundation of China[42090023] ; National Natural Science Foundation of China[42002279] ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences[KLSG201708]
WOS研究方向Engineering ; Geology
语种英语
WOS记录号WOS:000679273900002
出版者SPRINGER WIEN
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Science Foundation of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/101925]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Li, Xiao
作者单位1.Chinese Acad Sci, Key Lab Shale Gas & Geoengn, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Peng,Li, Xiao,Li, Shouding,et al. Quantitative Analysis of Anisotropy Effect on Hydrofracturing Efficiency and Process in Shale Using X-Ray Computed Tomography and Acoustic Emission[J]. ROCK MECHANICS AND ROCK ENGINEERING,2021:16.
APA Guo, Peng,Li, Xiao,Li, Shouding,Yang, Wencheng,Wu, Yanfang,&Li, Guanfang.(2021).Quantitative Analysis of Anisotropy Effect on Hydrofracturing Efficiency and Process in Shale Using X-Ray Computed Tomography and Acoustic Emission.ROCK MECHANICS AND ROCK ENGINEERING,16.
MLA Guo, Peng,et al."Quantitative Analysis of Anisotropy Effect on Hydrofracturing Efficiency and Process in Shale Using X-Ray Computed Tomography and Acoustic Emission".ROCK MECHANICS AND ROCK ENGINEERING (2021):16.

入库方式： OAI收割

来源：地质与地球物理研究所

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