含煤地区有机质在热演化过程中生成的天然气,由于区域地质条件不同而形成不同类型的天然气资源。全面认识它们的形成条件,有利于我们根据具体地质条件预测某一地区最可能的天然气聚气类型,以便开展针对性的勘探工作,达到提高勘探效率的目的。众所周知,与含煤地层有关的天然气一般分为两大类:一是煤系气藏;二是煤层甲烷。前者一般属常规天然气的范畴,后者为 Natural gas generated during the thermal evolution of organic matter in coal-bearing regions forms different types of natural gas resources due to different regional geological conditions. A comprehensive understanding of their formation conditions will help us to predict the most likely gas-gas type in a certain region according to the specific geological conditions so as to carry out targeted exploration and achieve the purpose of enhancing exploration efficiency. It is well-known that natural gas related to coal-bearing strata is generally divided into two categories: one is coal-bearing gas reservoirs; the other is coal bed methane. The former is generally a category of conventional natural gas, the latter is