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根据对沁水盆地南部煤层气丛式井产能情况以及对研究区生产井地质、工程条件的研究,确定了影响该地区煤层气井产出的主要地质、工程影响因素,指出煤层气的产量主要受煤层埋深、煤厚、含气量、渗透率、压裂液量以及砂比的影响。利用灰色关联分析方法确定了不同因素与产气量的相关性,分析认为砂比对丛式井产能的影响远大于其他影响因素,是影响煤层气产能的最关键因素。
Based on the study on productivity of CBM wells in the southern Qinshui Basin and the geological and engineering conditions of production wells in the study area, the main geological and engineering factors that affect the output of CBM wells in this area are determined. The main factors affecting CBM production are pointed out Coal seam depth, coal thickness, gas content, permeability, fracturing fluid and sand ratio. The correlation between different factors and gas production was determined by the gray relational analysis method. The analysis shows that the effect of sand ratio on cluster well productivity is far greater than other influencing factors, which is the most crucial factor affecting CBM productivity.