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根据兴县某区煤层气勘探井的钻探资料,对研究区煤层气的赋存特征进行了分析,认为山西组4+5号煤层、太原组8+9号煤层的厚度大、埋藏适中,含气量较高,成熟度属于中阶煤范围,构造位置以及水文地质条件有利于煤层气的勘探和开发。对6口勘探井的排采特征进行研究,结果表明研究区8+9号煤层具有较大的开采价值;断层对排水降压具有较大的影响。
Based on the drilling data of CBM exploration wells in a certain area of Xingxian County, the occurrence characteristics of CBM in the study area are analyzed. It is concluded that coal seam No. 4 + 5 in Shanxi Province and coal seam No. 8 + 9 in Taiyuan Formation are large in thickness and moderately buried with Higher gas volume and maturity belong to medium-rank coal range, and tectonic location and hydrogeological conditions are favorable to CBM exploration and development. The study on the discharge characteristics of six exploration wells shows that the No. 8 + 9 coal seam in the study area has great exploitation value and the fault has a great influence on the drainage pressure reduction.