Fracturing Around Dry/Wet Boundary in Tight Sandstones Monitored by Micro-seismicity in Laboratory
文献类型：期刊论文
| 作者 | Li, Xiaying2,3; Lei, Xinglin1; Shen, Haimeng2,3; Li, Qi2,3
|
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2023-05-01 |
| 卷号 | 56期号:5页码:3693 |
| ISSN号 | 0723-2632 |
| 关键词 | Partly saturation Pore pressure Fracture network Tight sandstone Acoustic emission |
| 英文摘要 | Pore fluid significantly affects the mechanical property of rocks. To understand the effect of heterogeneous distribution of pore water with high pressure, two partly saturated specimens of lower Shaximiao sandstone, which is a typical reservoir rock in Sichuan Basin, China, were performed under triaxial compression. The distribution of pore water was first derived from the ultrasonic mapping due to the obvious sensitivity of P-wave velocity to water infiltration. Owing to the direct measurements of multichannel P-wave velocity and injected fluid volume, the specimens along the axial direction could be divided into three sections: saturated (Sw similar to 100%), partially saturated (Sw < 100%), and dry regions (Sw similar to 0%), enabling us to investigate the fracturing behaviors around dry/wet boundary and examine the possibility of developing an interactive wet/dry mixed fracturing technology. The microcrack activity and fracturing process was captured by acoustic emission monitoring, and finally verified by X-ray computed tomography images after the experiments. Our results indicate that flooding region with higher pore pressure benefits earlier fracturing. Fracture initiated in the saturated region and migrated toward to the partially saturated and dry regions. As a result, heterogeneous distribution of pore water and pore pressure benefits the formation of complex microcrack network around the wet/dry boundary (partially saturated region) and induced seismicity with higher b-value. Thus, it seems to be promising to develop an interactive wet/dry mixed fracturing technology, which facilitates the formation of complex fracture networks and reduces the risk of induced earthquakes. These results may provide interesting references for applications related to hydraulic fracturing of tight sandstone. |
| 学科主题 | Engineering ; Geology |
| 语种 | 英语 |
| 出版者 | SPRINGER WIEN |
| WOS记录号 | WOS:000928695000001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35169]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8567, Japan 2.University of Chinese Academy of Sciences, Beijing 100049, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Xiaohongshan 2, Wuchang, Wuhan 430071, China |
| 推荐引用方式 GB/T 7714 | Li, Xiaying,Lei, Xinglin,Shen, Haimeng,et al. Fracturing Around Dry/Wet Boundary in Tight Sandstones Monitored by Micro-seismicity in Laboratory[J]. ROCK MECHANICS AND ROCK ENGINEERING,2023,56(5):3693. |
| APA | Li, Xiaying,Lei, Xinglin,Shen, Haimeng,&Li, Qi.(2023).Fracturing Around Dry/Wet Boundary in Tight Sandstones Monitored by Micro-seismicity in Laboratory.ROCK MECHANICS AND ROCK ENGINEERING,56(5),3693. |
| MLA | Li, Xiaying,et al."Fracturing Around Dry/Wet Boundary in Tight Sandstones Monitored by Micro-seismicity in Laboratory".ROCK MECHANICS AND ROCK ENGINEERING 56.5(2023):3693. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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