机械性能对钻井周围气水流量特征的影响:基于损坏的合模型的实施
Chunshan Zheng1,2, Haifei Wu1,2, Guofu Li3
1Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining, Anhui University of Science and Technology, Huainan 232001, China.
ACS omega
|May 6, 2024
概括
煤炭损坏对天然气开采分析产生了重大影响. 一个新的模型揭示了钻井周围破裂,塑料和弹性区域的透性变化,这对于优化甲回收至关重要.
科学领域:
- 地质技术工程 地质技术工程
- 采矿工程 采矿工程 采矿工程
- 石油工程是石油工程中的一个.
背景情况:
- 精确的气体开采泄漏分析需要考虑钻井周围的煤炭损害影响.
- 现有的模型可能无法完全捕捉压力,损伤,气体扩散和煤层漏的复杂相互作用.
研究的目的:
- 建立和验证一个结合煤炭应力和损伤,气体扩散和泄漏的流体-固体合模型.
- 分析气-水相参数在气体排水过程中钻井损伤区内的时空特征.
- 研究各种地力学参数对煤炭损坏和天然气开采流量的影响.
主要方法:
- 开发一种流体-固体合模型,将煤炭应力,损伤力学,气体扩散和泄漏整合起来.
- 模型的验证使用来自天然气提取操作的现场数据.
- 参数研究分析了等效塑料应变的影响,侧向压力系数,内部摩擦角度,凝聚力,扬模和波桑比率.
主要成果:
- 煤炭损坏在钻井周围产生了三区域的透性分布 (断裂,塑料,弹性),断裂区域的透性明显更高.
- 随着持续的气体提取,损坏区内的透性增加,而气体压力下降.
- 地力学参数,如等效塑料应变和侧面压力系数,对损伤区和峰值透率的尺寸和分布有很大影响.
结论:
- 开发的模型准确地预测了考虑到煤炭损坏的气体开采泄漏情况.
- 了解透性变化和损害区演变对于高效的钻井设计和甲提取至关重要.
- 这些发现为优化清洁甲资源回收提供了理论支持和实际指导.
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