平顶山矿区东段煤层气地质特征及开发潜力研究

摘要

平顶山矿区东段煤层气资源丰富，通过研究区构造背景、煤层展布特征、煤阶、煤储层物性特征及地下水动力条件等方面对二1煤层含气量及其控制因素进行了分析；结合抽采压力、地应力、煤体结构等，对该区煤层气开发潜力进行了探讨。研究结果表明：区内煤层气含气量较高，平均为14.2 m3/t，资源量为206.87亿m3，资源丰度为0.70亿m3/km2；煤体结构相对完整，煤储层渗透率为0.04～1.00mD；储层压力高，地应力梯度小。综合分析优选出东西两个有利区块，十三矿-首山一井-十矿-一矿深部（Ⅰ号区）为煤层气开发首选区块。%The CBM resources are abundant in the eastern sector of Pingdingshan mining area. From aspects of tectonic setting, coal seam extending characteristics, coal rank, coal reservoir physical property and groundwater dynamic condition, analyzed coal seam II 1 methane content and its controlling factors. Combined with drainage pressure, ground stress, coal mass structure etc, discussed CBM ex-ploitation potential in the area. The result has shown that the coal seams have high methane content in the area with average 14.2m3/t, total resource 20.687 billion m3, resource abundance is 70 million m3/km2;coal mass structure relatively integrated;coal reservoir per-meability 0.04~1.00m/d;high reservoir pressure and low ground stress gradient. Two favorable blocks in east and west parts have been optimized after comprehensive analysis, while the No.1 block extending from the Thirteenth coalmine-Shoushan No.1 mine shaft-Tenth coalmine-deep part of First coalmine is the preferred block for CBM exploitation.