华北地区石炭二叠系煤岩与煤层气储层物性分析

PHYSICAL BEHAVIOR ANALYSES OF PERMO-CARBONIFEROUS COAL LITHOLOGY AND COAL SEAM GAS RESERVOIRS IN NORTH CHINA

本文以丰富的地质资料对华北地区石炭三叠系煤岩的割理、吸附、孔隙溶积、含气性、灰分产率进行了较为系统的研究，建立了煤岩与煤层气储层物性的关系。提出了镜质组含量高的煤岩类型有较好的煤层气储集物性条件。华北地区石炭二叠系太原组、山西组煤层在北部和南部煤岩类型相对较差，中部最好，为煤层气储集条件有利区。

Based on abundant geological data, the cleat, adsorption, pore volume, gas-bearing prOperty and ash productivity of Permo-CarbOniferous coal in North China have been studied systematically in this paper,and the relationship of coal lithology to the physical behavior of coal seam gas reservoirs has been established. It is suggested that coal lithological types with high content vitrinites have better physical behavior conditions for coal seam gas accumulation. The coal beds of Carboniferous and Permian Taiyuan and Shanxi Formations in North China have relatively worse coal lithological types in the North and the South.The central part has the best coal lithological type and is a favourable region for the physical behavior conditions of coal seam gas reservoirs.