焦作矿区山西组二_1煤层含气量的控制因素探讨  

Discussion on Geological Controlling Factors of Coalbed Methane Content in Jiaozuo Mining Area

作　　者：宋志敏[1] 孟召平[2] 

机构地区：[1]郑州煤田职工地质学院,河南郑州450053 [2]中国矿业大学资源开发工程系,北京100083

出　　处：《中国矿业大学学报》2002年第2期179-181,共3页Journal of China University of Mining & Technology

基　　金：国家自然科学基金资助项目 ( 4 0 172 0 5 9)

摘　　要：分析了焦作矿区煤层气含量的分布规律 ;探讨了断块构造、煤层埋深、上覆岩层厚度等对煤层气的控制作用 .结果表明 :焦作矿区山西组二1煤煤层气含量较高 ,最高达 3 2 .7m3 /t(daf) ,平均为 1 6 .7m3 /t(daf) ;由于煤变质及其演化、煤层的有效埋藏深度、抬升剥蚀作用和地质构造等因素对煤储层特性产生显著的影响 ,使本区煤层气含量分布具有明显的规律性 ,从西部断块至东部断块煤层气含量由高到低变化 ,且各断块内由浅部向深部逐渐增高 .Distribution regularity of coalbed methane content in Jiaozuo mining area was analyzed; Factors such as faulted blocks, buried depth of coal bed, and the thickness of overlying bed were discussed. The result shows that the methane content of coal seam II 1 is up to 32.7m 3/t(daf), averaged by 16.7m 3/t (daf); Inside the faulted blocks, it increases generally from the shallow parts to the deep and decreases from west to east. The main geological factors influencing the distribution of coalbed methane content are coal petrographic characterizations, coal ranks, the buried depth of coal seams, and the uplifting erosion by tectonic activiies.

关 键 词：焦作矿区 山西组 煤层 含气量 控制因素 断块构造 有效埋藏深度 煤层气 

分 类 号：P618.11[天文地球—矿床学]