关键词: 华北盆地, 镜煤反射率, 煤成气, 热演化史, 热演化程度, 晚古生代煤, 资源评价, 生气量, 煤田分布, 煤系

Abstract: Coal series of Late Paleozoic age is widely distributed in the southern part or the North China Basin. Abundant in coal resources, it is a good source of coal gas. It has a complicated history of development, having undergone 4 stages of thermal evolution; the stage of equilibrium, the stage of differential evolution, the stage of overlapping evolution and the stage of depletion. In terms of the characteristics of burial, the basin is classified into regions of 5 different types: Y,N,U,W and V, with varying degrees of thermal evolution and wide discrepancies in the capability of gas generation. The Y-type region is considered to be a better prospect(like the Dongpu depression, Jiyuan-Kaifeng depression, Luyi depression etc.). Based on the study of burial-thermal evolution, the authors have made out the effective gas-generation capabilities and gas resources of the whole basin as well as of the different regions.