摘要
油气源条件关系到不同油气藏类型油气的富集程度。通过分析西湖凹陷平湖地区平湖组煤、炭质页岩及泥岩等烃源岩的有机质丰度、类型及成熟度等指标,认为该区平湖组不具备油气源条件。通过油气源对比及对前人资料的综合类比分析发现,平湖地区聚集的油气同源,且为二期成藏,主要来自东部三潭深凹陷,为源外油气藏。油气源条件决定了平湖地区主要发育构造油气藏,且由于不同部位的构造圈闭捕获油气的能力存在差异,造成油气充满度有所不同;对于岩性圈闭,只有存在断层或其他运移通道沟通油源时才能成藏。因此,在今后的部署工作中,要结合研究区的油气源条件,多角度分析不同类型圈闭成藏的可能性和富集程度。
The analysis on organic matter abundance,organic matter type,organic matter maturity etc.in Pinghu formation,indi-cates that the formation of coal,carbonaceous shale and mudstone are not qualified hydrocarbon source rock.Compared with hy-drocarbon sources and former data,it is concluded that the hydrocarbon accumulation in this area is supplied by mudstone and coal-bed in deeper depression or deeper layers of Pinghu formation.Because of the effect of hydrocarbon source condition,the a-bility of hydrocarbon capture in different structure traps is different,which leads to different hydrocarbon-filling degrees.For li-thologic hydrocarbon acoumulation,low enrichment of hydrocarbon source rock may cause the lack of hydrocarbon source if there is no fault or migration pathway.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第1期26-29,113,共4页
Petroleum Geology and Recovery Efficiency
关键词
油气源
烃源岩
成藏
构造
岩性
平湖地区
hydrocarbon source
source rock
reservoir accumulation
tectonics
lithology
Pinghu area
