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《Special Oil & Gas Reservoirs》 2007-05
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An overview of origin and accumulation of CO_2

LIAN Cheng-bo1,ZHONG Jian-hua1,2,QU Fang1,ZHANG Jun-tao3,YANG Yu-Fang2(1.China University of Petroleum,Dongying,Shandong 257061,China;2.Guangzhou Institute of Geochemistry,CAS,Guangzhou,Guangdong 510640,China;3.Nanjing University,Nanjing,Jiangsu 210093,China)  
High-purity carbon dioxide(CO2) gas reservoir is not only an important resource,but also has significant geological meanings.Carbon dioxide geology is a frontier of geosciences.The origins of CO2 are divided into two categories: inorganic and organic.The CO2 of organic origin was generated from organic matters by different geochemical actions;the CO2 of inorganic origin was generated from inorganic mineral or elements by related chemical actions.The origins of CO2 are discriminated according to rare gas abundance and isotope ratio and combining with geological conditions of gas accumulation.There are some similarities in migration and accumulation comparing CO2 with hydrocarbon gas,but there also some difference because of the intrinsic physical and chemical characteristics and special genetic process of CO2.This paper systematically discusses the origin,geochemical index,migration and accumulation,and exploration method of CO2 gas reservoir.
【Fund】: 国家自然科学基金(No.40503003);; 中国石油天然气集团公司创新基金(2002F70108)
【CateGory Index】: P618.13
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