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Pressure Solution Compaction During Creep Deformation of Tournemire Shale: Implications for Temporal Sealing in Shales

文献类型：期刊论文

作者Geng, Zhi3,4; Bonnelye, Audrey2; David, Christian5; Dick, Pierre6; Wang, Yanfei1,4; Schubnel, Alexandre3
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2021-03-01
卷号126期号:3页码:16
关键词clay rich material creep deformation fault gouge pressure solution shale strength gain
ISSN号2169-9313
DOI10.1029/2020JB021370
英文摘要The temporal evolution of gouge compaction determines fluid transfer and rock rupture dynamics. Thus, studies on the time-dependent creep compaction processes of shale materials may elucidate the chemo-mechanical behavior of shallow clay-rich zones. We investigated this problem by combining creep experiments conducted in triaxial compression under upper crustal conditions with modeled pressure solution processes in Tournemire shale. The shale samples were deformed parallel and perpendicular to the bedding at low (10 MPa, 26 degrees C, this study) and high (80 MPa, 26 degrees C, published by Geng et al., 2018, ) pressures. We monitored the deformation during stepping creep experiments until sample failure. Our results differ from those of traditional creep experiments and show that the creep failure strength of Tournemire shale samples increased significantly (by similar to 64%) at both pressures. Our experiments suggest that at appropriate temperatures, the pressure solution is highly active and is the dominant temporal sealing mechanism in the shale. Using our experimental data and the statistical rock physics method, we modeled the temporal reduction of effective porosity in terms of depth and temperature. Our thermal-stress coupled modeling results suggest that the pressure solution induced sealing is the most active at middle-shallow depths (similar to 3.8 km). We believe that the sealing capacity and creep failure strength of dolomite-rich shales may change significantly at middle-shallow depths, indicating an important influence on reservoir fluids transfer and fault gouge strength.
资助项目IGGCAS[SZJJ201901] ; National Key R&D Program of China[2018YFC1504203] ; National Key R&D Program of China[2018YFC0603500] ; European Research Council[ERC-2015-CoG: 681346-REALISM]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000638091600071
出版者AMER GEOPHYSICAL UNION
资助机构IGGCAS ; IGGCAS ; IGGCAS ; IGGCAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; European Research Council ; European Research Council ; European Research Council ; European Research Council ; IGGCAS ; IGGCAS ; IGGCAS ; IGGCAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; European Research Council ; European Research Council ; European Research Council ; European Research Council ; IGGCAS ; IGGCAS ; IGGCAS ; IGGCAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; European Research Council ; European Research Council ; European Research Council ; European Research Council ; IGGCAS ; IGGCAS ; IGGCAS ; IGGCAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; European Research Council ; European Research Council ; European Research Council ; European Research Council
源URL[http://ir.iggcas.ac.cn/handle/132A11/101131]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Geng, Zhi; Wang, Yanfei
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China
2.GFZ German Res Ctr Geosci, Helmholtz Ctr Potsdam, Sect Geomech & Sci Drilling 4 2, Potsdam, Germany
3.PSL Res Univ, Lab Geol ENS UMR 8538, Paris, France
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing, Peoples R China
5.Univ Cergy Pontoise, Dept Geosci & Environm, Cergy Pontoise, France
6.Inst Radioprotect & Surete Nucl IRSN, Fontenay Aux Roses, France
推荐引用方式
GB/T 7714		 Geng, Zhi,Bonnelye, Audrey,David, Christian,et al. Pressure Solution Compaction During Creep Deformation of Tournemire Shale: Implications for Temporal Sealing in Shales[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(3):16.
APA Geng, Zhi,Bonnelye, Audrey,David, Christian,Dick, Pierre,Wang, Yanfei,&Schubnel, Alexandre.(2021).Pressure Solution Compaction During Creep Deformation of Tournemire Shale: Implications for Temporal Sealing in Shales.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(3),16.
MLA Geng, Zhi,et al."Pressure Solution Compaction During Creep Deformation of Tournemire Shale: Implications for Temporal Sealing in Shales".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.3(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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