声发射监测裂缝技术在沈北煤田煤层气开发的应用分析

Application Analysis of Acoustic Emission Monitoring Technology in Coalbed Methane Development of Shenbei Coalfield

声发射技术是一种精准的煤层裂缝监测技术。在沈北煤田原始煤层气压裂改造过程中,使用了声发射技术中平面任意三角形阵列的源定位方法进行了压裂裂缝监测利用该方法成功获取了改造区煤层裂缝形态,确定压裂井间干扰距离,提供了压裂施工监测参数。这项技术的应用对沈北煤田煤层富集层段的压裂改造监测、压裂效果评价及井网布置调整起到了指导性的作用。

Acoustic emission technology is a precise coal seam fracture monitoring technique.In the fracturing transformation process of the original coalbed methane in Shenbei Coalfield,the arbitran planar triangular array source localization method of acoustic emission technique is used in fracturing monitoring.By this method,the characteristic of coal seain fractures in transformation zone is successfully obtained,which determines the interference distance between fracturing wells and provides the parameters for fracturing monitoring.The application of this technique in coal enrichment section of Shenl)ei Coalfield plays a guiding role in the monitoring of strata fracturing,fracturing affect evaluation and well network layout adjustment.