Experimental investigation on different effects of fracturing fluids on mechanical properties and failure mechanism of continental shale
文献类型：期刊论文
| 作者 | Yang, Hanzhi; Wang, Lei; Yang, Chunhe; Guo, Wuhao; Bi, Zhenhui; Guo, Yintong |
| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
 |
| 出版日期 | 2023-04-01 |
| 卷号 | 164 |
| ISSN号 | 1365-1609 |
| 关键词 | Continental shale Fracturing fluid immersion Failure characteristic Mechanical property Brittleness evaluation |
| 英文摘要 | Continental shale is abundant with unconventional oil and gas and has considerable potential for exploitation. However, due to differences in the deposition environment, continental shale presents unique characteristics in terms of mineralogy and mechanical properties compared to marine shale. Furthermore, the mechanical influ-ence of fracturing fluid immersion must be considered because of the dual effects on the productive shale system caused by fracturing fluids remaining in the formation. In this study, tri-axial compression tests were performed on Jurassic continental shale specimens collected from an exploratory well (2778-2816 m deep) in the Sichuan Basin of China before and after exposure to fracturing fluids. Meanwhile, two quantitative indicators, the roughness R, which characterizes the widely distributed yield deformation, and the complexity F, which eval-uates the complex multi-fractures, were used to distinguish the different brittle-plastic characteristics of speci-mens before and after fracturing fluid immersion. The results showed that the immersion of fracturing fluids weakened the mechanical properties of continental shale. Two types of fracturing fluid immersion effects were distinguished by the statistics of the failure characteristics of the different layers: lubrication-dominated and softening-dominated. Unlike conventional smooth tri-axial stress-strain curves, many of the post-peak curves were in a 'step-like' shape, corresponding to two sources: one part came from the formation of multi-fractures (brittle characteristics), and the other part came from the softening deformation of main failure surface (plas-tic characteristics). A new brittleness index, BInew, was proposed considering failure characteristics with different brittleness effects, which could effectively distinguish the brittleness difference before and after exposure to fracturing fluids. |
| 学科主题 | Engineering ; Mining & Mineral Processing |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000944407000001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34828]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chongqing University; 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Yang, Hanzhi,Wang, Lei,Yang, Chunhe,et al. Experimental investigation on different effects of fracturing fluids on mechanical properties and failure mechanism of continental shale[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2023,164. |
| APA | Yang, Hanzhi,Wang, Lei,Yang, Chunhe,Guo, Wuhao,Bi, Zhenhui,&Guo, Yintong.(2023).Experimental investigation on different effects of fracturing fluids on mechanical properties and failure mechanism of continental shale.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,164. |
| MLA | Yang, Hanzhi,et al."Experimental investigation on different effects of fracturing fluids on mechanical properties and failure mechanism of continental shale".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 164(2023). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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