煤系非常规气叠置成藏特征研究  

Study on characteristics of accumulation and accumulation for unconformity gas in coal measures

作　　者：田鹏州[1] 

机构地区：[1]河南省煤田地质局一队,河南新郑451150

出　　处：《能源与环保》2017年第4期146-150,154,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

摘　　要：通过对煤层气、页岩气和致密砂岩气的成藏特征、成藏条件、成藏机理的对比分析,认为煤层广泛赋存煤层气,煤系地层中泥岩和粉砂岩类广泛赋存页岩气,邻近烃源岩的砂岩层广泛赋存致密砂岩气。煤层气储集在煤层及其碎屑岩夹层中,页岩气以泥岩及其内部的薄层砂质岩为主要储集介质,致密砂岩气富集在砂岩层中,3种气藏的储集层都具有低孔低渗的特点。煤系地层发育煤层、暗色泥页岩以及砂岩,并且紧邻或相近发育,经历了相同的沉积埋藏史、受热生烃史和构造演化史,形成了页岩气—煤层气—致密砂岩气共同成藏的复合成藏体系。Based on the comparative analysis of the characteristics of coalbed methane,shale gas and tight sandstone gas,the forming conditions,forming conditions and forming mechanism,it is believed that coalbed methane is widely distributed in the coal seam. Shale gas is widely distributed in the mudstone and siltstone of the coal-bearing strata,and tight sandstone gas is widely distributed in the sandstone layer near the source rock. The coalbed gas is stored in the coal seams and clastic interbeds. The shale gas is mainly composed of mudstone and thin sandstone,and the tight sandstone gas is enriched in sandstone. All these gas reservoirs have the features of low porosity and low permeability. Coalbed strata developed coalbeds,dark shales and sandstones,and they are close to or close to each other. They experienced the same history of hydrocarbon generation and tectonic evolution in the same sedimentary burial history,and formed the complex reservoir system combined with shale gas-coalbed methane-tight sandstone gas.

关 键 词：煤层气 页岩气 致密砂岩气 成藏特征 成藏条件 成藏机理 

分 类 号：P618.11[天文地球—矿床学]