The Formation Conditions of Upper Paleozoic Coal-genetic Gas in the East Linqing Depression

Carboniferous and Permian coal-bearing formations in the east Linqing depression are composed of coal bed, dark mudstone and limestone and clastic rock. Main source rocks are made-up of coal bed, mudstone and limestone. This paper briefly introduced the sedimentary characteristics of gas source rocks. We studied the organic geo chemistry characteristics of source rocks of coal-bed and confirmed the potential of hydrocarbon-generating in this area. At the same time we forecasted that four types of reservoir-caprock assemblage and four types of gas pool exited in this area, combining with the comprehensive analysis of reservoir caprock conditions. We think that the studied area possess the basic formation conditions of coal-genetic gas pool and has large exploration potential of coal-gentic gas.