中国页岩气资源勘探潜力

页岩气是以吸附和游离状态同时存在于泥页岩地层中的天然气，它分别在天然气的成因机理、赋存相态、成藏聚集机理、分布变化特点及其与其他类型气藏关系之间存在广泛的变化性。由于页岩气成藏边界条件可有适度地放宽且变化较大，各成藏地质要素之间具有明显的互补性。基于地质、测井、地震等方法和手段，可对页岩气进行快速识别。研究表明，中国存在页岩气大量发育的区域地质条件，初步计算中国页岩气资源量约为（15~30）×10¹² m³。平面上以中国南方和西北地区最为有利（也包括鄂尔多斯盆地及其周缘），剖面上以古生界资源量为最大，中生界位居其次。

EXPLORATION POTENTIAL OF SHALE GAS RESOURCES IN CHINA

Shale gas is a kind of unconventional natural gas which mainly exists as adsorbed and free gas in shales. Shale gas or gas shale is extensively variable on the genetic mechanism, existing phase, accumulation mechanism, distribution variation, and relationship with other kinds of gas reservoirs. Since the boundary conditions for shale gas accumulation can be broadened moderately and the variation can be very extensive, every geological element for gas accumulation in shales is of obvious complementarity with each other. Based on geology analysis, logging data and seismic study, shale gas accumulations can be rapidly recognized. It demonstrates that there exist favorable geological conditions for regional distribution of shale gas in China, of which the primarily assessed resources of shale gas is about 15 30 tcm. The most profitable regions are South and Northwest China, including the Ordos basin and vicinage basins. Among the regions, the resource of shale gas in Paleozoic is the largest, while the second is in Mesozoic.