Effects of shear on development characteristics of organic matter pores in shale: A case study of shale in the Niutitang Formation of the well XAD1
文献类型：期刊论文
| 作者 | Yu, Yuxi1,2; Wang, Zongxiu1; Zhang, Kaixun1; Feng, Xingqiang1; Cheng, Ming2,3 |
| 刊名 | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
 |
| 出版日期 | 2022-04-01 |
| 卷号 | 211页码:17 |
| 关键词 | Organic matter pore Microscopic deformation Shear Pore structure The niutitang formation |
| ISSN号 | 0920-4105 |
| DOI | 10.1016/j.petrol.2022.110166 |
| 英文摘要 | The development characteristics of organic matter pores (OMPs) in shales is fundamental to the gas-bearing property of the shales. Detachment is one of the most common types of structural deformation in shale formations. To investigate the characteristics of OMPs in shear-deformed shale and the associated effects on the pore structure of shale gas reservoir, two sets of detachment zones and the intercalated non-detachment zone of shale formations in the Niutitang Formation of the Well XAD1 are studied. Based on scanning electron microscope observations and low-pressure gas adsorption tests, the impacts of shear on the shale pore structure are evaluated quantitively and the deformation mechanism for OMPs in shale is established. Results indicate that the dominant pore type of shale in the Niutitang Formation of the Well XAD1 is OMPs. With the mineral rheology, organic matters are enriched in the clay gouge, which are more prone to shear deformation compared with those outside the gouge. Under shear, pores developed within the organic matter experienced directional elongation and compression, decreasing the pore sizes and lowering the volumes of the corresponding pores 30 nm; and the contact surface between organic matter and minerals becomes dislocated and open, increasing the volumes of the corresponding pores 30 nm. The effect of shear on OMPs is dominated by pore reduction. The volume loss ratio of shale micropores in detachment zones is the highest which can reach over 90%. The impact of shear on pore structures of non-detachment zone cannot be neglected within the thickness range of 5-20 m from the detachment surface, and the degree of pore reduction gradually decreases as the distance from the detachment zones increases. It is indicated that the detachment and its adjacent horizons are not favorable for shale gas exploration because of the low porosity and adsorption capacity. |
| WOS关键词 | OPALINUS CLAY INSIGHTS ; GAS-STORAGE ; THRUST CHARACTERISTICS ; DOMINATED DETACHMENT ; MAIN-FAULT ; DEFORMATION ; EVOLUTION ; POROSITY ; ZONE ; MECHANISMS |
| 资助项目 | Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accu-mulation and Exploitation ; Chinese National Natural Science Foundation[41902136] ; Chinese National Natural Science Foundation[41802178] ; China Geological Survey[DD20190085] ; China Geological Survey[DZLXJK202101] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000760778400001 |
| 出版者 | ELSEVIER |
| 资助机构 | Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accu-mulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accu-mulation and Exploitation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; China Geological Survey ; China Geological Survey ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accu-mulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accu-mulation and Exploitation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; China Geological Survey ; China Geological Survey ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accu-mulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accu-mulation and Exploitation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; China Geological Survey ; China Geological Survey ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accu-mulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accu-mulation and Exploitation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; China Geological Survey ; China Geological Survey |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/104962]  |
| 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 | Wang, Zongxiu |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Geomech, Key Lab Shale Oil & Gas Geol Survey, Beijing 100081, Peoples R China 2.Shaanxi Key Lab Lacustrine Shale Gas Accumulat &, Xian 710075, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Yuxi,Wang, Zongxiu,Zhang, Kaixun,et al. Effects of shear on development characteristics of organic matter pores in shale: A case study of shale in the Niutitang Formation of the well XAD1[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2022,211:17. |
| APA | Yu, Yuxi,Wang, Zongxiu,Zhang, Kaixun,Feng, Xingqiang,&Cheng, Ming.(2022).Effects of shear on development characteristics of organic matter pores in shale: A case study of shale in the Niutitang Formation of the well XAD1.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,211,17. |
| MLA | Yu, Yuxi,et al."Effects of shear on development characteristics of organic matter pores in shale: A case study of shale in the Niutitang Formation of the well XAD1".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 211(2022):17. |
入库方式： OAI收割
来源：地质与地球物理研究所
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