摘要
有机成因δ^13Cco2值小于－10‰，无机成因δ^13Cco2值则大于－8‰；天然气中CO2含量大于60％是无机成因的，小于此值有机的、无的和混合的成因均有。CO2含量90％以上称CO2气藏、90％－60％叫亚CO2气藏、60％－15％为高含CO2气藏、15％以下为含CO2气藏。我国东部已发现万金塔气田、花沟气藏、黄桥气田和平方王气顶气藏等一批无机成因的CO2气藏。其中黄桥和万金塔气田已开发。最后，研究了无机成因CO2气藏的特征。
The 13Cco2values of the carbon dioxide (CO2) of organic origin are lighter than -10%,and the 13Cco2 values of inorganic origined carbon dioxide (CO2) are usually heavier than - 8%.If the CO2 content in a certain natural gas is more than 60% ,the CO3 gas is of inorganic origin;If the CO2 content in a gas is less than 60%,then the CO2 might be of organic origin,or inorganic origin,or mixed origin, A natural gas accumulations with CO2 content higher than 90% is called carbon dioxide gas accumulation,that with 90-60% CO2 content is called subsidiary carbon dioxide gas accumulation,and that with 60 - 15% CO2 content is called CO2 highly hearing gas accumulation;and the so called CO2 bearing gas accumulations are those gases with CO2 content lower than 15 %, Several carbon dioxide gas accumulations of inorganic origin have been discovered in enst pan of China, such as Wanjinta gas field,Huagou gas pool, Huangqiao gas field and Pinfangwang gas field etc. ,of which the Huangqiao gas field and the Wanjinta gas field have already been in the process of development. The characteristics of the carbon dioxide gas accumulations of inorganic origin arc also studied in this paper.
出处
《中国海上油气（地质）》
1994年第4期215-222,共8页
China Offshore Oil and Gas(Geology)
基金
国家自然科学基金项目
关键词
中国东部
二氧化碳气藏
无机成因
特征
east part of China
dioxide gas accumulations
inorganic origin
