淮北地区煤储层物性及煤层气勘探前景

Physical Property of Coal Reservoir and Exploration Prospects for Coal Bed Methane in Huaibei Area

研究了淮北地区地质构造演化及控气特征 ,结果认为 :淮北地区印支期以来的构造演化对煤储层物性控制作用十分显著 ,以 EW向的宿北断裂为界 ,北部地区煤层气勘探前景不佳 ,南部地区的东部 ,煤层的展布受褶皱形态的控制 .在宿南向斜和南坪向斜中 ,煤层埋深、煤体结构、含气性、含气量和渗透率等储层物性均有利于煤层气的运移、聚集和保存 ,具有较好的煤层气勘探前景 ;临涣矿区强变形构造煤发育 ,煤体结构复杂 ,基本无勘探前景 ;涡阳矿区正断层发育 ,煤层气含量相对较小 ,但渗透性较好 。

Characteristics of structural evolution and coalbed methane controlling were researched. The results indicate that since the Indo China Movement, the physical characteristics of coal reservoir has been controlled by structural evolution obviously. Bordered by the northern Suxian fault trended EW, the exploration prospect of coalbed methane in the north area is not good. While in the eastern part of the southern area, distribution of coal is controlled by the pattern of folds. In southern Suxian syncline and Nanping syncline, buried depth of coal seams, coal structure, gas bearing character, gas content and permeability are all favorable for the migration, concentration, and preservation of coalbed methane. Therefore, they have a good exploration prospect of coalbed methane. Because the greatly deformed tectonic coal develops widely and the coal structure is complex, Linhuan mining area has a bad exploration prospect. In Guoyang mining area, the amount of coalbed methane is relatively small. However, it is worth to have a further investigation because of the good permeability.