基于煤层气井二次压裂的抽采效果分析

Analysis on Drainage Effect of Secondary Fracturing in Coalbed Methane Well

通过分析阳泉煤业寺家庄矿区煤系地层的成煤特征及瓦斯赋存规律,对煤层气二次压裂及抽采机理进行了研究,并分析了压裂效果。通过分析影响抽采效果的因素,提出了针对性的改进措施。对该矿YQ-001井15~#煤层压裂施工,实际注入液量801.63 m3,加入0.45~0.90 mm石英砂40.26 m^3,加砂率100%,符合设计要求,达到了储层改造的目的。

Analyses the law of the coal forming characteristics and coal bed methane reservoir in Sijiazhuang coal field in Yangquan coal mining,studies the mechanism for gas drainage and secondary fracture,makes a careful assessment on the effect. After a fully analysis on the factors that affect the drainage,targeted measures are put forward.Fracturing engineering is conducted with the total liquid injection of 801. 63 m^3,quartz sand of 40. 26 m^3 at the size of 0. 45～0. 90 mm,all of which complies with the design requirement and meets the engineering goal.