The key stage and moment of coalbed gas reservior evolution in the Qinshui Basin, China
The evolution of coalbed gas reservoir is characterized by coalbed gas geochemistry and gas content. On the basis of burial history and thermal history, the forming process of coalbed gas reservoir and the gas accumulative history in the Qinshui Basin are discussed in this paper. The difference of the thermal history, geochemistry characteristic,and gas accumulative history between Yangcheng and Huozhou areas shows that the formation of coalbed gas reservoir in the Qinshui Basin is controlled by the geological process in the critical stage and the critical moment. The components and isotopes of coalbed methane are determined by the stage at which the coal maturation reaches its maximum rank. The coalbed methane accumulative history is related to the temperature and pressure of the coal burial history, because the coalbed gas is mainly in adsorptive state.It is stated that the gas content in the coal seam is controlled by the moment when the coal seam is uplifted to the shallowest position.
作 者： ZHAO Mengjun SONG Yan SU Xianbo LIU Shaobo QIN Shengfei HONG Feng LIN Xiaoying 作者单位： ZHAO Mengjun,SONG Yan,LIU Shaobo,QIN Shengfei,HONG Feng(Research Institute of Petroleum Exploration and Development, Petro China, Beijing 100083, China)SU Xianbo,LIN Xiaoying(Henan Polytechnic University, Jiaozuo 454000, China)
刊 名： 科学通报（英文版） SCI 英文刊名： CHINESE SCIENCE BULLETIN 年，卷(期)： 2005 50(z1) 分类号： P5 关键词： burial history key stage and moment gas accumulative process Qinshui Basin