Hydrofracturing fluid-weakened shear behavior of sandstone joints
文献类型：期刊论文
| 作者 | Song, Jinliang1,2; Cheng, Dongliang1; Jiang, Annan1; Hu, Dawei2; Ma, Jun1; Ding, Changdong3 |
| 刊名 | ACTA GEOTECHNICA
 |
| 出版日期 | 2023-12-26 |
| 页码 | 13 |
| 关键词 | Hydrofracturing fluid treatment Hydrofracturing fluid-weakened mechanism Joint fabrication Shear behavior Sandstone joint |
| ISSN号 | 1861-1125 |
| DOI | 10.1007/s11440-023-02141-7 |
| 英文摘要 | The weakened shear behavior of sandstones induced by hydrofracturing fluids significantly affects the activation of natural fractures during hydraulic stimulation in hydrocarbon and geothermal exploitations. This paper presents an experimental study of characterizing the sandstone joints treated by water-based fracturing fluid (WFF) and acid mixture solution (AMS) treatment that simulate rock joint-hydrofracturing fluid interactions in deep reservoirs during short shut-off times on wells after hydraulic fracturing. Three-dimensional (3D) optical scanning method coupled with 3D rigid engraving was utilized to create replicas of natural rock joint surfaces, and direct shear tests were conducted to probe the shearing behavior of untreated and WFF/AMS-treated replicas with three different roughness levels and under two high normal stresses of 15 and 30 MPa. Microindentation and X-ray diffraction were then performed to investigate the degradation of mechanical properties and potential alterations in composition and microstructure of the hydrofracturing fluid-treated joint surfaces. The results indicate that short-term interactions between the hydrofracturing fluids and sandstone can lead to a reduction in mechanical properties and frictional resistance of the joint surface, ultimately weakening its shearing properties. The decline in mechanical properties observed in the AMS-treated sample is attributed predominantly to the dissolution of QFC (quartz, feldspar, and calcite) and swelling of clay minerals. For the WFF-treated sample, clay mineral swelling and the residual guanidine gum on the joint surfaces remain the primary factors contributing to the reduction in shearing resistance. At high normal stresses of 15 and 30 MPa, joints with different roughnesses exhibit asperity shearing off as the dominant mechanism. Furthermore, an increase in joint roughness leads to a higher friction angle on the joint surface. However, higher normal loads could result in a reduction in apparent cohesion. The results of this study provide valuable insights into the interactions between hydrofracturing fluids and sandstone, as well as the behavior of natural fracture activation during hydraulic fracturing. |
| 资助项目 | National Key Research and Development Program of China[2022YFE0137200] ; National Key Research and Development Program of China[52179141] ; National Key Research and Development Program of China[52179114] ; National Natural Science Foundation of China ; OeAD-GmbH Scientific & Technological Cooperation (WTZ) Austria/China program[LJKMZ20220381] ; Basic Research Program of Liaoning Provincial Department of Education[3132023182] ; Fundamental Research Funds for the Central Universities ; China National Petroleum Corporation |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001130404800001 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40212]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Jiang, Annan; Hu, Dawei |
| 作者单位 | 1.Dalian Maritime Univ, Coll Transportat Engn, Dalian 116026, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.Changjiang River Sci Res Inst, Key Lab Geotech Mech & Engn, Minist Water Resources, Wuhan 430010, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Jinliang,Cheng, Dongliang,Jiang, Annan,et al. Hydrofracturing fluid-weakened shear behavior of sandstone joints[J]. ACTA GEOTECHNICA,2023:13. |
| APA | Song, Jinliang,Cheng, Dongliang,Jiang, Annan,Hu, Dawei,Ma, Jun,&Ding, Changdong.(2023).Hydrofracturing fluid-weakened shear behavior of sandstone joints.ACTA GEOTECHNICA,13. |
| MLA | Song, Jinliang,et al."Hydrofracturing fluid-weakened shear behavior of sandstone joints".ACTA GEOTECHNICA (2023):13. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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