Fracture initiation and propagation of supercritical carbon dioxide fracturing in calcite-rich shale: A coupled thermal-hydraulic-mechanical-chemical simulation
文献类型：期刊论文
| 作者 | Wu, Lin1,2,3; Hou, Zhengmeng1,2; Xie, Yachen1,2,4; Luo, Zhifeng3; Xiong, Ying5; Cheng, Long3; Wu, Xuning2,3; Chen, Qianjun2; Huang, Liangchao1,2 |
| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
 |
| 出版日期 | 2023-07-01 |
| 卷号 | 167期号:-页码:- |
| 关键词 | scCO2 fracturing Calcite-rich shale THMC coupling Injection temperature Calcite dissolution |
| ISSN号 | 1365-1609 |
| 英文摘要 | The initiation and propagation mechanisms of supercritical carbon dioxide (scCO2) fracturing are more complex than those of hydraulic fracturing in calcite-rich shale due to the temperature-pressure sensitivity of scCO2 and scCO2-brine-rock interactions. In this study, we present an enhanced thermal-hydraulic-mechanical-chemical (THMC) simulator called CMPSF, which incorporates a rock damage model and a CO2 physical property model into the COMSOL-MATLAB-PHREEQC (CMP) coupling framework via MATLAB. Furthermore, the coupling procedure of CMPSF is optimized from a previous sequential non-iterative approach to a sequential partly-iterative approach. We then utilize CMPSF validated with numerical and experimental examples to analyze the evolution of THMC fields and examine the impact of calcite content and injection temperature on fracture initiation and propagation of scCO2 fracturing in calcite-rich shale. The simulation results reveal that the decreased mass fraction of calcite is 1.5%o and the porosity increment from calcite dissolution is 0.33%o at most within 12 min. A higher calcite content and injection temperature lead to a decrease in fracture initiation pressure and an increase in rock damage ratio. Specifically, as the calcite content increases from 50 wt% to 80 wt %, the fracture initiation pressure decreases by 0.1 MPa, and the final damage ratio increases by 0.25%. As the injection temperature increases from 30 degrees C to 60 degrees C, the fracture initiation pressure decreases by 4.3 MPa, and the final damage ratio increases by 1.55%. Calcite dissolution has a minor impact on fracture initiation and propagation at the early stage of scCO2 fracturing only from the perspective of affecting seepage, and its long-term effects require further investigation. Our findings provide insight into the complex THMC coupling pro-cesses of scCO2 fracturing in calcite-rich shale. |
| 学科主题 | Engineering ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000988857500001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35492]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Sino-German Research Institute of Carbon Neutralization and Green Development, Zhengzhou University, Zhengzhou, 450001, China 2.Institute of Subsurface Energy Systems, Clausthal University of Technology, Clausthal-Zellerfeld, 38678, Germany 3.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China 4.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China 5.School of Earth and Space Sciences, Peking University, Beijing, 100871, China |
| 推荐引用方式 GB/T 7714 | Wu, Lin,Hou, Zhengmeng,Xie, Yachen,et al. Fracture initiation and propagation of supercritical carbon dioxide fracturing in calcite-rich shale: A coupled thermal-hydraulic-mechanical-chemical simulation[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2023,167(-):-. |
| APA | Wu, Lin.,Hou, Zhengmeng.,Xie, Yachen.,Luo, Zhifeng.,Xiong, Ying.,...&Huang, Liangchao.(2023).Fracture initiation and propagation of supercritical carbon dioxide fracturing in calcite-rich shale: A coupled thermal-hydraulic-mechanical-chemical simulation.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,167(-),-. |
| MLA | Wu, Lin,et al."Fracture initiation and propagation of supercritical carbon dioxide fracturing in calcite-rich shale: A coupled thermal-hydraulic-mechanical-chemical simulation".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 167.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。