淮南地区煤层气地质条件及勘探远景
Geological Condition and Exploration Potential of Coalbed Gas in the Huainan Area
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摘要: 淮南地区构造位置处于华北地台东南部,是一呈北西西向展布的复式向斜。区内二叠系煤层厚度大,分布面积广,资源丰度为1.334×108m3/km2,具有较高的资源潜力。但由于煤的变质程度较低,煤质较差,加上逆掩断裂的挤压作用,使地层有效地应力较高、造成煤储层渗透性较差;再者,煤储层的含气饱和度较低,开煤层气的产出较为不利;但在构造的转折端及背科的倾伏部位,存在着微裂隙较发育的地应力低带,有希望找到煤层气勘探开发的有利区。Abstract: The coal bearing strata in Huainan area is situated in the south-east portion of the North China platform,a synclinorium with northwest by west.In the Permian of the area,the coal resources is 1.33 × 108m3/km2, but it is disadvantageous to produce the coalbed gas for low permeability of coal reservoir. In turning point and anticlinal p1unging portion -microfracture development and low stress area,it is favorable to prospect a coalbed gas.