| New method to differentiate between matrix and micro-fractures using diffusion data in gas shale | |
| Yang L(杨柳)1; Shi X2; Zhang KH2; Ge HK2; Gao J3; Tan XQ3; Xu P3; Li LD3 | |
| Source Publication | 51st US Rock Mechanics / Geomechanics Symposium 2017 |
| 2017 | |
| Pages | 2035-2039 |
| Conference Name | 51st US Rock Mechanics / Geomechanics Symposium 2017 |
| Conference Date | June 25, 2017 - June 28, 2017 |
| Conference Place | San Francisco, CA, United states |
| Abstract | The fact that salt ions in shale pores diffuse into fracturing fluids is key factor to lead to recovered water with high salinity. In this paper, the authors conduct the test of mineral composition and SEM to understand the reservoir characteristics. The diffusion experiments are conducted on crushed samples, and a new method is proposed to differentiate between matrix and microfractures by using diffusion data. A large amount of salt ions exit in shale pores and can diffuse into fracturing fluids after fracturing operations. To a great extent, ion diffusion rate is determined by the development of microfractures. The crushed samples with smaller grain diameter contain have lower diffusion rate due to the low probability of microfractures development. When the grain diameter is lower than critical value, the crushed samples cannot contain microfractures. As for Longmaxi formation sample, the fracture-matrix boundary is about 80mesh.The research contributes to understanding the reservoir characteristics and salinity profiles of gas shale. © 2017 ARMA, American Rock Mechanics Association. |
| Keyword | Diffusion in liquids Fracture Ions Matrix algebra Rock mechanics Shale Shale gas Diffusion experiments Diffusion rate Fracture matrix Fracturing operations Ion diffusion rate Low probability Mineral composition Reservoir characteristic |
| ISBN | 9781510857582 |
| Indexed By | EI |
| Language | 英语 |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/78010 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Institute of Mechanics, Chinese Academy of Sciences, Beijing, China; 2.China University of Petroleum (East China), Qingdao, Shandong, China; 3.Research Institute of Petroleum Exploration and Development, Beijing, China |
| Recommended Citation GB/T 7714 | Yang L,Shi X,Zhang KH,et al. New method to differentiate between matrix and micro-fractures using diffusion data in gas shale[C]51st US Rock Mechanics / Geomechanics Symposium 2017,2017:2035-2039. |
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| File Name/Size | DocType | Version | Access | License | ||
| EiCpA037.pdf（895KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Download | ||
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