Experimental Investigation on the Crack Evolution of Marine Shale with Different Soaking Fluids
文献类型：期刊论文
| 作者 | Wang, Lei3; Bi, Zhenhui1,3; Zeng, Yijin2; Yang, Guangguo2; Guo, Yintong3; Yang, Hanzhi1 |
| 刊名 | FRONTIERS IN EARTH SCIENCE
 |
| 出版日期 | 2021-11-16 |
| 卷号 | 9页码:11 |
| 关键词 | marine shale hydration fracture spatial-temporal evolution fracture mechanical model fracture network |
| DOI | 10.3389/feart.2021.759538 |
| 英文摘要 | Hydration induced cracks could promote the complexity of hydraulic fractures in marine shale gas reservoir. But the evolution process and forming mechanism has not been fully investigated. In this paper, Longmaxi marine shale were collected and immersed in three types of fluids (distilled water, fracturing fluid, and mineral oil) for more than 10 days. The spatial-temporal evolution of soaking fractures was recorded and analyzed. A fracture mechanical model was established, considering the effects of in-situ stress, fluid pressure, hydration stress, and capillary force. The promotion mechanism of hydration cracks in forming complex fracking network was discussed. Results showed that hydration fractures were extremely developed and evenly distributed in a state of network for specimens immersed in distilled water. For specimens soaked in fracturing fluid, the hydration cracks were moderately developed for the addition of anti-swelling agent. Fractures were rarely developed for specimens treated in mineral oil. The hydration fractures were mainly formed in the first 5 h and showed strong anisotropy. Cracks parallel to the bedding planes accounted for the vast majority, with a small proportion developed in vertical direction. Theoretical calculations indicated that the stress intensity factor (SIF) caused by hydration stress and capillary force was greater than the measured fracture toughness. The micro crack would probably propagate along bedding planes and grow up into macro horizontal fractures, which promoted the formation of crisscrossing fracture network in shale gas formation. |
| 资助项目 | Sinopec Science and Technology Department Project[P21056] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | FRONTIERS MEDIA SA |
| WOS记录号 | WOS:000726127500001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/28320]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Bi, Zhenhui |
| 作者单位 | 1.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing, Peoples R China 2.Sinopec Res Inst Petr Engn, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Lei,Bi, Zhenhui,Zeng, Yijin,et al. Experimental Investigation on the Crack Evolution of Marine Shale with Different Soaking Fluids[J]. FRONTIERS IN EARTH SCIENCE,2021,9:11. |
| APA | Wang, Lei,Bi, Zhenhui,Zeng, Yijin,Yang, Guangguo,Guo, Yintong,&Yang, Hanzhi.(2021).Experimental Investigation on the Crack Evolution of Marine Shale with Different Soaking Fluids.FRONTIERS IN EARTH SCIENCE,9,11. |
| MLA | Wang, Lei,et al."Experimental Investigation on the Crack Evolution of Marine Shale with Different Soaking Fluids".FRONTIERS IN EARTH SCIENCE 9(2021):11. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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