Effect of initial pore pressure on the hydraulic fracturing of tight sandstone: an experimental study
文献类型：期刊论文
| 作者 | Ma, Dongdong; Wu, Yu; Yin, Jiadi; Lu, Jingjing; Hu, Dawei; Zhou, Hui |
| 刊名 | GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 9期号:1 |
| 关键词 | Tight sandstone Initial pore pressure Hydraulic fracturing Viscous stress |
| ISSN号 | 2363-8419 |
| 英文摘要 | Pore pressure is a crucial factor affecting reservoir stimulation, especially in unconventional reservoirs, because it can control crack initiation and propagation. However, studies on the effect of initial pore pressure on hydraulic fracturing in low-permeability reservoirs are lacking, and fracturing mechanism remains unclear. Therefore, we conducted hydraulic fracturing tests under initial pore pressure, and proposed an improved fracturing initiation criterion to elucidate the fracturing mechanism of tight sandstone. The results demonstrated that the breakdown pressure increased with the initial pore pressure by 8 to 24%, and its evolution was identified approximately by the improved initiation criterion, which resulted in the complicated, invisible and intense features of the macroscopic fracture morphology and microscopic crack. The finding was mainly due to the viscous stress induced by fracturing disturbance under initial pore pressure and represented the dual interaction between rock structure and work fluid viscosity. As a result, the change in microporous diameter in micropores and a high pressure to failure can be obtained. Accordingly, the initial pore pressure in tight sandstone may not only induce n effective stress on the skeleton but also be responsible for the double effect on the fracturing mechanism with high pressure and intense failure features, which should be given attention in unconventional reservoir stimulation. |
| 学科主题 | Energy & Fuels ; Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000934528200003 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35125]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.China University of Mining & Technology; China University of Mining & Technology; 2.Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS 3.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; |
| 推荐引用方式 GB/T 7714 | Ma, Dongdong,Wu, Yu,Yin, Jiadi,et al. Effect of initial pore pressure on the hydraulic fracturing of tight sandstone: an experimental study[J]. GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,2023,9(1). |
| APA | Ma, Dongdong,Wu, Yu,Yin, Jiadi,Lu, Jingjing,Hu, Dawei,&Zhou, Hui.(2023).Effect of initial pore pressure on the hydraulic fracturing of tight sandstone: an experimental study.GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,9(1). |
| MLA | Ma, Dongdong,et al."Effect of initial pore pressure on the hydraulic fracturing of tight sandstone: an experimental study".GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES 9.1(2023). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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