中国煤储层渗透性及其主要影响因素

利用９０年代以来全国煤层气钻井的大部分试井渗透率资料，客观地评价了我国主要煤层气聚集区、带煤储层渗透性状况，研究了中国煤层渗透率的主要影响因素．我国煤层渗透率普遍低于美国煤盆地．区域上具有一定的分布规律．华北聚气区东部渗透率相对较低，而西部渗透率相对较高．东北聚气区、华南聚气区煤储层的渗透率较低．地应力是影响中国煤层渗透率的主要因素，渗透率随深度的变化趋势是应力的函数．

COAL RESERVOIR PERMEABILITY AND ITS CONTROLLED FACTORS IN CHINA

Based upon the most of the welltesting data in China since the 1990s, the coal reservoir permeability and its controlled factors in the major CBMaccumulating districts and zones was truly evaluated. It was found that the coal reservoir permeability in China is generally lower than that in America and occurs regularly in region. The permeability is lower in the eastern North China CBMaccumulating province than in the western one, and lower in the Northeast China and South China CBMaccumulating provinces than in the North China one. The coal reservoir permeability in China might be mainly controlled by the stress and the distribution of the permeability with burial depth of coal reservoirs seems to be the function of the stress.