摘要
基于22口探井取心、测录井、地化及分析测试资料的综合分析,认为金湖凹陷古近系戴一段具备阜四和阜二段2套烃源岩多源供烃的有利条件,其中凹陷断裂带油气来自阜四段烃源岩,斜坡带来自阜二段烃源岩。戴一段的三角洲河道砂体发育,与上覆"五高导"泥岩组成良好的储盖组合。同时本区还具备了由砂层、断层、不整合面3种类型通道共同构成的良好油气运移网络。在此基础上,建立了金湖凹陷构造油气藏和隐蔽油气藏2种成藏模式,其中构造成藏模式又可分为断裂带和斜坡带2种成藏模式,这对优选有利区带及下步勘探起着重要的指导意义。
Based on the analyses of coring, logging, geochemical and testing data of 22 prospecting wells, it is believed that the lower Dainan Formation of Paleogene in Jinhu Sag has favorable source rocks, including the fourth and the second member of Funing Formation. Petroleum in the fault zone and in the slope zone respectively come from the source rocks in the fourth member and the second member of Funing Formation. Delta channel sandbodies that developed well in lower Dainan Formation together with the overlying mudstone characterized by high conductivity compose the favorable reservoir-seal assemblage. Sandbody, fault and unconformity build up the petroleum migration pathway in this area. Two kinds of petroleum accumulation models are established in Jinhu Sag for subtle reservoir and structural reservoir. The accumulation model for structural reservoir can be divided into two kinds for fault zone and slope belt, which is favorable for guiding the further exploration.
出处
《岩性油气藏》
CSCD
2008年第3期34-38,78,共6页
Lithologic Reservoirs
关键词
成藏条件
成藏模式
戴一段
金湖凹陷
苏北盆地
accumulation conditions
accumulation model
lower Dainan Formation
Jinhu Sag
Subei Basin
