阳泉区块寺家庄井田分压合层排采适应性探讨

Research on the Adaptability of Layered Fracture and Multi Layer Drainage in Sijiazhuang Mine Field of Yangquan Block

阳煤集团寺家庄井田地质构造简单,含煤层较多,可采煤层煤层气地质储量可观。本文通过分析寺家庄区块煤层间距、围岩力学性质、储层压力、临界解吸压力、压裂前后渗透率对比、水文地质等得出结论:寺家庄区块8、9号煤层满足分压合层排采条件,15号煤层部分满足分压合层排采。加强对不同地质条件下分压合层排采适应性的研究,可有效提高煤层气抽采率。

Yangquan coal group Sijiazhuang mine field has simple geological structure, more coal seam and con- siderable coalbed methane reserves. Analyzes the distances between coal seam, mechanics character of surrounding rock, reservoir pressure, and so on. It obtains that drainage, part of the No. rate by strengthening critical desorption pressure, permeability contrast by fracturing, hydro geological condition all of the No. 8 and No. 9 coal seam satisfy the condition of layered fracture and multi layer 15 coal seam satisfies the condition. It can effectively increase coalbed methane extraction research of layered fracture and multi layer drainage in different geological situations.