Effect of Hydration under High Temperature and Pressure on the Stress Thresholds of Shale
文献类型：期刊论文
| 作者 | Wu, Jianfa2; Guo, Yintong3; Huang, Haoyong2; Zhao, Guokai1; Gou, Qiyong2; Gui, Junchuan2; Xu, Ersi2 |
| 刊名 | ENERGIES
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 16期号:23页码:13 |
| 关键词 | shale stress thresholds fracturing fluid high temperature and pressure |
| DOI | 10.3390/en16237778 |
| 英文摘要 | The stress threshold of deep reservoir shale subjected to fracturing fluid immersion is an important factor affecting fracture initiation and propagation during fracturing. However, little information has been reported on the effect on shale of soaking at high temperature and high pressure (HTHP). In this study, immersion tests and triaxial compression tests were carried out at reservoir temperature and in-situ stress on the downhole cores with different mineral compositions. The characteristics of stress thresholds, i.e., crack initiation stress (sigma ci), crack damage stress (sigma cd), and peak deviator stress (sigma p), of shale affected by the different times of soaking with low-viscosity fracturing fluid (a) and the different viscosity fracturing fluids (a, b, and c) were investigated. The results show that hydration at HTHP has a significant softening effect on the stress thresholds (sigma ci, sigma cd, sigma p) of reservoir shale, but the softening rate varies for samples with different mineral compositions. The crack initiation stresses of quartz-rich and clay-rich shales treated with different soaking times and different soaking media remain almost unchanged in the range of 47 to 54% of the corresponding peak strength, while the crack initiation stresses of carbonate-rich shales are significantly affected. The ratio sigma cd/sigma p of quartz-rich shale is significantly affected by the different viscosity fracturing fluids (a, b) and the different times of soaking with low-viscosity fracturing fluid (a), while clay- and carbonate-rich shales are less affected. The results of this study can provide a reference for the fracturing design of deep shale gas development. |
| WOS研究方向 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:001117945700001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39983]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Huang, Haoyong |
| 作者单位 | 1.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China 2.PetroChina Southwest Oil & Gas Field Co, Shale Gas Res Inst, Chengdu 610051, Peoples R China 3.Inst Rock & Soil Mech, Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Jianfa,Guo, Yintong,Huang, Haoyong,et al. Effect of Hydration under High Temperature and Pressure on the Stress Thresholds of Shale[J]. ENERGIES,2023,16(23):13. |
| APA | Wu, Jianfa.,Guo, Yintong.,Huang, Haoyong.,Zhao, Guokai.,Gou, Qiyong.,...&Xu, Ersi.(2023).Effect of Hydration under High Temperature and Pressure on the Stress Thresholds of Shale.ENERGIES,16(23),13. |
| MLA | Wu, Jianfa,et al."Effect of Hydration under High Temperature and Pressure on the Stress Thresholds of Shale".ENERGIES 16.23(2023):13. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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