煤层气井压裂效果评价方法

Evaluation Method of Fracturing Effect for Coal-Bed Gas Wells

通过把压裂施工阶段作为试井注入阶段,压裂施工后关井作为试井的压降阶段,对压降曲线进行试井分析,得到裂缝长度等压后储层参数,进而对压裂效果进行评价,并制定了压后效果评价标准,对不同类型煤层气井的压裂工艺、施工参数和压裂液体系进行优化,为下步整体压裂排采效果的综合评价提供了可靠的依据。

Regarding fracturing as injection stage of well testing,and shutting-in after fracturing as pressure falling-off stage of well testing;analyzing the falling-off data to get some parameters such as fracture length etc.and then evaluating the effect of fracturing,an evaluation standard for fracturing effect has been proposed,in which different fracturing techniques,different job parameters and fracturing liquids for different coal-bed gas wells are optimized.This evaluation standard provides reliable basis for comprehensive evaluation of the effect of fracturing and discharging and production.