Studies on Mechanical Properties and Failure Characteristics of Anisotropic Shale Under True Triaxial Loading at Real-Time High Temperature

被引:0
作者
Xia, Yingjie [1 ,2 ,3 ]
Wang, Yusheng [1 ,2 ]
Yang, Hai [5 ]
Zhao, Danchen [1 ,2 ,4 ]
Yin, Zhenyu [4 ]
Tang, Chun'an [1 ,2 ]
Chen, Jian [5 ]
机构
[1] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China
[2] Dalian Univ Technol, Sch Civil Engn, Dalian 116024, Peoples R China
[3] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
[4] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China
[5] CNPC Chuanqing Drilling Engn Co Ltd, Chengdu 610051, Peoples R China
基金
中国国家自然科学基金;
关键词
Real-time high temperature; True triaxial compression test; Anisotropy; Shale; Brittleness evaluation; ROCK; BRITTLENESS; STRESS; SANDSTONE; BEHAVIOR; CRITERIA; DAMAGE;
D O I
10.1007/s00603-025-04493-w
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
The efficient extraction of deep shale gas (burial depth > 3500 m) in challenging high-temperature and high-stress environments plays a pivotal role in advancing natural gas development. This study investigates how real-time high temperatures and bedding plane inclinations (BPI) affect the mechanical properties of shale, including strength, deformation, and brittleness, under true triaxial loading conditions. Experiments on Longmaxi Formation shale reveal that the true triaxial compressive strength (TCS) and elastic modulus (TEM) exhibit significant temperature thresholds between 120 degrees C and 160 degrees C, attributed to the dissipation of adsorbed water in clay minerals speculatively. Failure modes are significantly affected by temperature and bedding plane inclination (BPI). Notably, for samples with a 45 degrees BPI, fracture strike changes occur at higher temperatures (160 degrees C and 200 degrees C) due to reduced shear strength along bedding planes. Numerical simulations confirm that this is driven by differing thermal expansion coefficients between bedding planes and the matrix. Additionally, brittleness, evaluated through stress-strain based indices, is affected by temperature, BPI, and loading direction relative to bedding planes. These findings significantly advance the understanding of anisotropic shale behavior under high-temperature conditions, offering insights for optimizing engineering strategies in deep shale gas extraction.
引用
收藏
页码:7203 / 7234
页数:32
相关论文
共 74 条
[1]  
Andreev G.E., 1995, Brittle failure of rock materials, P446
[2]   Numerical Study on the Zonal Disintegration of a Deeply Buried High-Temperature Roadway during Cooling [J].
Chen, Baoping ;
Li, Yingchun ;
Tang, Chun'an .
COMPUTERS AND GEOTECHNICS, 2024, 165
[3]   Quantitative evaluation of rock brittleness based on crack initiation stress and complete stress-strain curves [J].
Chen, Guoqing ;
Jiang, Wanzeng ;
Sun, Xiang ;
Zhao, Cong ;
Qin, Chang'An .
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 2019, 78 (08) :5919-5936
[4]  
Chen M., 2012, PET DRILL TECH, V40, P7, DOI DOI 10.3969/J.ISSN.1001-0890.2012.04.002
[5]  
Cheng JY, 2015, SHOCK VIB, V2015, DOI [10.1155/2015/290293, 10.1038/srep12516]
[6]   OBERT,L - ROCK MECHANICS AND DESIGN OF STRUCTURES IN ROCK [J].
COOK, NGW .
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS, 1967, 284 (05) :335-&
[7]  
Fairhurst CE, 1999, INT J ROCK MECH MIN, V36, P281
[8]  
[方敬锐 Fang Jingrui], 2021, [工程地质学报, Journal of Engineering Geology], V29, P1303
[9]   Conditional modeling of recurrent event data with terminal event [J].
Fang, Weiyu ;
Zhou, Jie ;
Xie, Mengqi .
LIFETIME DATA ANALYSIS, 2025, 31 (01) :187-204
[10]   Water adsorption and its impact on the pore structure characteristics of shale clay [J].
Feng, Dong ;
Li, Xiangfang ;
Wang, Xiangzeng ;
Li, Jing ;
Sun, Fengrui ;
Sun, Zheng ;
Zhang, Tao ;
Li, Peihuan ;
Chen, Yu ;
Zhang, Xu .
APPLIED CLAY SCIENCE, 2018, 155 :126-138