织纳煤田上二叠统煤层气能量系统及其控藏效应  

Upper Permian Series CBM Energy System and Its Reservoir Controlling Effect in Zhina Coalfield

作　　者：高弟[1,2] 秦勇[1] 吴财芳[1] 易同生[2] 

机构地区：[1]中国矿业大学煤层气资源与成藏过程教育部重点实验室,江苏徐州221116 [2]贵州省煤田地质局,贵州贵阳550009

出　　处：《中国煤炭地质》2012年第9期1-6,共6页Coal Geology of China

基　　金：国家973计划项目资助(2009CB219605);国家科技重大专项项目资助(2011ZX05034);国家自然科学基金面上项目资助(41272178)

摘　　要：基于织纳煤田上二叠统煤层气富集成藏条件,结合统计资料和实验测试数据成果,依据煤储层弹性能表征模型,定量分析了研究区煤储层能量系统的分布规律及煤层气成藏效应。结果表明:织纳煤田弹性能呈"西高东低,南高北低,西南部显著较高"的分布格局,煤基块弹性能分布格局比气体弹性能复杂,煤层气体弹性能对能量系统的贡献率随埋深加大而显著增高,但在一定埋深处发生"跳跃"。结合沁水盆地煤层气勘探开发效果,煤层气成藏效应可划分为四种基本类型,通过对比分析,纳煤田煤层气成藏效应分属两个类型,绝大部分地段属于Ⅰ型,主要分布在织纳煤田西部;Ⅲ型位于文家坝南段勘探区。Based on the Upper Permian Series CBM enrichment and reservoiring condition in the Zhina coalfield, combined with statistical data and laboratory tested data, using coal reservoir elastic energy representation model, quantitatively analyzed study area coal reservoir energy system distribution pattern, discussed CBM reservoiring effect in Zhina coalfield. The result has demonstrated that： the elastic energy in the coalfield presents a distribution pattern of ＂high west low east, high south low north and evidently higher in southwest＂, coal base block elastic energy distribution pattern is more complex than that of gases. Contribution rate of CBM elastic energy to energy system increased significantly along with the increasing of buried depth, but ＂jumping＂ in certain depth. According to CBM exploration and exploitation effect in the Qinshui basin, the CBM reservoiring effect can be partitioned into four basic types, after contrastive analysis, CBM reservoiring effect in Zhina coalfield is supposed to belong two types respectively, the greatest part is type I, mainly in the western Zhina coalfield; type II in the Wenjiaba south sector exploration area.

关 键 词：织纳煤田 上二叠统 煤储层弹性能 煤层气成藏效应 

分 类 号：P618.11[天文地球—矿床学]