Creep characteristics of a fracturing fluid-softened shale investigated by microindentation
文献类型：期刊论文
| 作者 | Song, Jinliang; Xiang, Degui; Hu, Dawei; Zhou, Hui; Guo, Dongdong; Zhang, Guoping |
| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
 |
| 出版日期 | 2022-04-01 |
| 卷号 | 152 |
| ISSN号 | 1365-1609 |
| 关键词 | Creep Microindentation Shale gas Shale softening Thermo-hydro-mechano-chemical treatment Viscoelasticity |
| 英文摘要 | The creep of shales affects the fracture conductivity, well production rate, and hence ultimate recovery of hydrocarbons from reservoir formations. This paper presents an experimental study of the creep characteristics of a shale softened by thermo-hydro-mechano-chemical (THMC) treatments that mimic the rock-fluid interactions affected by high temperature, high pressure, and hydraulic fracturing fluids. Microindentation was conducted to characterize the creep behavior of the THMC-treated specimens with the data analyzed by the Kelvin-Voigt (KV) and compliance methods, while X-ray diffraction and scanning electron microscopy were performed to analyze the compositional and microstructural changes respectively to aid interpretation of indentation measurements. Results show that the THMC treatments increase the creep rate by 46-162%, owing to the treatment-induced softening that varies with the treatment time and distance from the fluid-rock interface, while the Young's modulus and hardness decrease with both the THMC-treatment and creep durations. The softened zones become more viscous, as reflected by the decreased KV model's viscoelastic coefficients for the softened specimens. The higher creep rate of the softened zones is primarily attributed to the weakening in cementation bond and increase in microscale porosity due to the dissolution of carbonates. The findings help understand the mechanisms for creep deformation and pertinent proppant embedment in fractured shales, and hence can be used to predict shale gas production and optimize fracturing fluid additives and stimulants. |
| 学科主题 | Engineering ; Mining & Mineral Processing |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000771927200001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35443]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; 2.University of Massachusetts Amherst 3.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; 4.China National Petroleum Corporation; 5.University of Massachusetts System; |
| 推荐引用方式 GB/T 7714 | Song, Jinliang,Xiang, Degui,Hu, Dawei,et al. Creep characteristics of a fracturing fluid-softened shale investigated by microindentation[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2022,152. |
| APA | Song, Jinliang,Xiang, Degui,Hu, Dawei,Zhou, Hui,Guo, Dongdong,&Zhang, Guoping.(2022).Creep characteristics of a fracturing fluid-softened shale investigated by microindentation.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,152. |
| MLA | Song, Jinliang,et al."Creep characteristics of a fracturing fluid-softened shale investigated by microindentation".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 152(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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