摘要
本文以油气地化特征的分析为重点,配合不同类型气藏形成特点和上二叠统生油气条件的综合分析,查明长兴组生物礁气藏及非礁相气藏的凝析油都主要来自龙潭组黑色页岩和煤,基本上属高成熟煤成油。气属多源的混合成因,其中生物礁气藏的气主要来自龙潭组并混入了部分长兴组油型气;非礁相气藏的气属龙潭组煤系和长兴组碳酸盐岩混合来源的二次生成气。实际资料分析表明,上二叠统油气主要来自本身,不可能来自石炭系以下的深层气源岩。
By putting stress on the analysis of geochemical characteristics of oil and gas,combined with the comprehensive analysis of formation features of various type gas reservoir and condition of oil and gas generation in the Upper Perm- ian,this paper demonstrates that condensate in both the biogenic reef reservo- irs and non-reef facies mainly comes from black shale and coal of the Longtan group,and it is a highly matured coaliferous oil,while the gas has multiple sources.The gas in the biogenic reef gas reservoirs mainly comes from the Lon- gtan group,and is mixed with a potation of petroliferous gas from the Changx- ing group.The gas of non-reef facies is a secondary gas from mixed sources from carbonate rocks of the Changxing group and coal seams of the Longtan group.An analysis of actual informations shows that the gas and oil in the Upper Permian is mainly originated from itself,and is not from those deep gas -source rocks underneath the Carboniferous formations.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1989年第3期32-41,共10页
Petroleum Exploration and Development
