摘要
中国东部油气区发现众多无机成因CO2气田（藏），CO2含量一般大于60％，甲烷等烷烃气含量较低，一般小干10％。本文通过二氧化碳碳同位素组成，R／Ra值等地化参数分析，并结合相关气藏地质特征，指出除莺歌海盆地CO2气田（藏）为变质成因外，中国东部其它CO2气田（藏）主要为幔原火山─—岩浆成因。
Numerous CO2 fields(pools) of inorganic origin are discovered in east China. Usually their CO2 con- tents exceed 6O%, and alkane gas contents are lower than 1O%. After an analysis of geochemical parameter s i.e. carbon isotopic composition and R/Ra value of CO2, etc, plus a combination of the geological features of the related pools, the paper proposed that except those in Yingge marine basin, which have a metamorphic origin, the rest of CO2 fields (pools) in east China can be attributed to predominantly an origin of mantle-derived volcano-magma.
出处
《石油实验地质》
CAS
CSCD
北大核心
1997年第3期215-221,共7页
Petroleum Geology & Experiment
