筠连煤层气井高产水原因分析及措施成效

为了提高煤层气井的单井产量,通过开展煤层段及相邻含水层位的水动力特征及煤层压裂的裂缝延伸情况研究,结果表明高产水的主要原因为发育在断层附近的部分煤层段在压裂后沟通了外来水源;根据静态、动态结合分析确定了主要产水层位,通过采取堵水措施,封堵主要产水层位,有效的控制了单井产水,提高了单井产气量,取得良好生产效果。形成了该区域煤层气高产水井有效的治理体系,指导煤层气井持续稳产开发。

Reason Analysis of High Water Production in Junlian Coalbed Methane Well and Effect of Measures

In order to increase the single well production of coalbed methane well,the hydrodynamic characteristics of coal seam and adjacent Aquifer and the fracture extension of coalbed fracturing were studied,the results show that the main reason of high water production is that the part of coal seam near the fault is connected with the external water source after fracturing,and the main water production horizon is determined according to the static and dynamic analysis,plugging the main water-producing horizon effectively controls the water production of single well,improves the gas production of single well,and achieves good production effect.The effective control system of high CBM production wells in this area has been formed to guide the sustainable and stable production development of CBM wells.