关于水力压裂与不同煤炭结构组合的裂纹启动和传播的实验研究
Du Liu1,2, Longyong Shu2, Yanbin Wang3
1China Coal Research Institute, Beijing 100013, China.
ACS omega
|October 23, 2023
概括
煤炭结构显著影响储水池刺激. 不同的煤炭结构组合影响水力压裂,颗粒式煤经常抑制裂扩张并促进变形.
科学领域:
- 地质工程是地质工程.
- 石油工程是石油工程中的一个.
- 岩石机械学 岩石机械学
背景情况:
- 煤矿库刺激的有效性严重依赖于地质因素.
- 了解煤炭结构对于优化水库性能至关重要.
研究的目的:
- 研究不同煤炭结构组合对水力压裂的影响.
- 分析与煤炭结构相关的裂纹启动和膨胀特征.
主要方法:
- 根据地质特征将煤矿库分为不同的结构组合类型.
- 使用专用设备进行室内液压压裂实验.
- 剖析和分析裂传播模式.
主要成果:
- 煤炭二元结构 (未变形/火灾性+颗粒性煤) 在更强的煤炭组件中显示纵向裂纹形成.
- 增加的颗粒煤比例抑制了裂的传播,并诱导横向变形.
- 三重煤结构表现出复杂的断裂行为,受层厚度和组件类型的影响.
- 特定的分层结构 (颗粒化+灾难性+颗粒化) 会导致灾难性煤的剪切失败.
结论:
- 煤炭结构的组合决定了水力压裂过程中的断裂启动和传播.
- 这些发现为复杂的煤矿库中的水力压裂机制提供了关键的见解.
- 这些结果对于在地质上多样化的煤层中改进刺激策略具有重要意义.
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