【作者】 夏鹏； 王晋； 冯绍盛； 边结晶； 曾凡桂；

【Author】 Xia Peng;Zeng Fangui;Wu Jing;Wang Jin;Feng Shaosheng;Department of Geoscience and Technology, Taiyuan University of Technology;Shanxi Key Laboratory of Coal and Coal Measures Gas Geology Exploration;

【机构】 太原理工大学地球科学与工程系； 煤与煤系气地质勘探山西省重点实验室；

【摘要】 为反映褶皱区煤层气富集规律,进而优选有利开发区,本文以西山煤田古交矿区马兰区块为例,结合煤芯测试数据、测井解释成果、煤矿采掘地质等资料分析区块内煤层气富集规律及其主控因素。结果表明:马兰区块因储层构造变形严重,煤层气逸散量大,含气量较低;在煤储层构造变形少、厚度及埋深大、有机质丰度高、吸附能力强的区域,有利于煤层气的富集;当直接顶板为泥岩时,泥岩顶板厚度越大,一方面煤层气保存条件越好,此外,泥岩越厚导致煤层灰分含量越高,生气能力和吸附能力越弱,含气量越低。马兰区块东部煤层气丰度高(>0.37×108m~3/Km~2)、资源量大,是煤层气开发的有利区。更多还原

【Abstract】 In this work, coal core testing data, logging interpretation results and mining geological data in the Malan block, Gujiao area, Xishan coal field, were collected to analyze the distribution of coalbed methane(CBM) and its’ dominating factors. The results show that, the gas content of coal in the Malan block is low since its complicate structural form. Less deformation of coal seam, deep burial depth, high fixed carbon content, strong adsorption capacity are helpful for the enrichment of CBM. Thicker mudstone roof is better to cap coal reservoir, however, which is corresponding to higher ash content and worse adsorption ability of coal reservoir at the same time. The eastern region of the Malan block is favorable region for CBM development with CBM concentration is more than 0.37 × 10~8m~3 per square kilometer.更多还原