摘要
The curve of vitrinite reflectance(RO)-depth(H)is successive across the unconformity on top of Carboniferous-Permian strata in Zhaoyuan area,which means the Carboniferous-Permian buried deep during the later sedimentation.The maximal paleogeothermal gradient of the study area is the CarboniferousPermian paleogeothermal gradient analyzed by R.P.Suggate standard plate.Based on the occurring positions and homogenization temperatures of fluid inclusions,there are twice hydrocarbon charges.The results show that the Carboniferous-Permian source rocks have a secondary hydrocarbon-generation after later deep burial,and Zhaoyuan area is the favorable area for secondary gas-generation.