西湖凹陷平湖地区油气源分析及其对成藏的影响  

Analysis on hydrocarbon source and influence on reservoir formation,Pinghu area,Xihu depression

作　　者：赵兰全[1] 

机构地区：[1]中国石化股份胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2011年第1期26-29,113,共4页Petroleum Geology and Recovery Efficiency

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.

关 键 词：油气源 烃源岩 成藏 构造 岩性 平湖地区 

分 类 号：TE112.114[石油与天然气工程—油气勘探]