煤层气井可控冲击波储层增透选井方法

Well Selection Method of Controlled Shock Wave Reservoir Permeability Enhancement in Coalbed Methane Well

可控冲击波可对煤层气近井地带储层实施改造,应用该技术的煤层气井选井方法并不明确,现场一般采用经验法或试验法。通过引入运筹学和模糊数学理论,在确定影响可控冲击波实施效果的13个因素的基础上,构建递阶层次结构模型得到各因素的影响权重,通过模糊综合评价方法得到可控冲击波实施效果评价分数,确定备选井的可行性。采用该方法优选的3口现场实施井,措施后产量都实现了不同程度的增长,其储层改造效果与评价结果趋势相一致。

The controllable shock wave can be used to transform the coalbed methane reservoir near the well.The well selection method of coalbed methane well applying this technology is not clear,and the field generally uses the empirical method or the test method.Through the introduction of operational research and fuzzy mathematics theory,on the basis of determining 13 factors affecting the implementation effect of controlled shock wave,a hierarchical structure model is constructed to obtain the influence weight of each factor.The evaluation score of the implementation effect of controlled shock wave is obtained by fuzzy comprehensive evaluation method to determine the feasibility of alternative wells.The three wells selected by this method achieved varying degrees of production growth after the measures,and the reservoir reconstruction effect was consistent with the trend of evaluation results.