煤层气排采产气效果影响因素分析——以延川南工区谭坪构造带排采井为例

Analysis of Influence Factors on CBM Drainage and Production Effects——An Example from Drainage Wells in Tanping Tectonic Area of Yanchuannan Block

通过跟踪分析延川南煤层气田谭坪构造带内排采井的生产动态,按产能大小和排采动态曲线趋势对排采井进行了分类统计,确定了煤层气井在排采过程中对产气效果影响较大的因素是排采的不连续和不稳定,工程条件、煤层条件和地质构造条件是影响排采产气的关键因素。

Classification statistic is conducted for CBM Drainage wells in Tanping tectonic area of Yan- chuannan CBM Block on the basis of productivity size and dynamic curve trend, according to the tracking analysis of the production performance of the CBM wells. It is confirmed that discontinuous and unstable drainage is the factor that has great influence on gas production of CBM wells, and the conditions of engi- neering, coal seam and geological structure are key factors which influence on the drainage and produc- tion.