对于煤床中断裂网络形成的液压压裂的实验分析
Jiwei Yan1,2, Xiaoxia Song3
1Key Laboratory of In-Situ Property-Improving for Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, People's Republic of China. yan8127@126.com.
Scientific reports
|July 2, 2025
概括
有效的煤床甲生产依赖于了解多尺度液压断裂 (HFs). 下降和水平断裂模式在CBM提取中比上升或波动模式更有效.
科学领域:
- 地质科学 地质科学
- 石油工程是石油工程中的一个.
- 材料科学 材料科学 材料科学
背景情况:
- 优化煤床甲 (CBM) 生产需要对多尺度液压断裂 (HF) 分布的彻底了解.
- 煤层中的水力压裂在规模上有很大的不同,从米到毫米.
研究的目的:
- 分析煤层中多尺度液压断裂的特征和影响因素.
- 识别与更有效的CBM生产相关的骨折模式.
主要方法:
- 使用煤矿面部,X射线计算机断层扫描 (CT) 和立体镜观察液压断裂.
- 水力压裂曲线的分类 (下降,水平,上升,波动).
- 对宏观断裂形状 (水平,垂直,X,T) 和它们与CBM井口的距离进行分析.
主要成果:
- 下降和水平的液压压裂曲线表明,与上升和波动类型相比,压裂更有效.
- 宏观骨折更集中,并且与CBM井口附近的床层平面相互连接.
- 裂变液沿弱表面传播,可以穿透各种煤层和煤,石英砂可能会引发稳定的毫米级裂.
结论:
- 多级液压断裂的分布和有效性受到煤炭结构,岩石强度,应力条件,断裂设计以及石英砂和煤炭细的存在的影响.
- 了解这些因素对于通过改进的液压压裂技术优化CBM提取策略至关重要.
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