沁西北X区块煤层气富集高产主控因素分析

Main Factors Influencing Accumulation and High Output of CBM, X Block, Northwestern Qinshui Basin

以沁西北X区块煤层气开发为实例,从煤系条件、构造活动、水文条件等煤层气富集主控因素分析对煤层气储存富集的影响和控制作用,并结合煤层气开发排采资料得出煤层气富集高产主控因素。结论认为:煤层气高产区必定在煤层气富集区,但同时还受到工程条件、排采制度等的影响;煤层气富集高产地带通常由某个因素主导或多个因素共同作用,因此在后期勘探开发工作中,优选煤层气富集高产区时有必要对不同条件的控制因素进行综合分析。

Taking the development of coalbed methane(CBM), X block, northwestern Qinshui Basin, as an example, based on gasproducing situation of some drainage wells, we implemented a study on the main factors influencing the CBM accumulation and high output. Moreover, we discussed the effect of coal measure conditions, structural movement, and hydrological conditions on the accumulation and high output. Results show that one area with high yield must be located at CBM accumulation belts, which is affected by both engineering conditions and drainage system; and one accumulation and high-output belt should be influenced by multiplefactors. So, in the next exploration and production, it's essential to analyze comprehensively the influencing factors with various conditions when optimizing these belts.