辽河盆地东部凹陷中段油气成藏模式

复杂的断裂系统以及异常活跃的火山作用使辽河盆地东部凹陷中段具有独特的成藏模式。通过火山作用与油气的关系、成藏物质基础和空间条件的剖析.建立了东部凹陷中段油气成藏模式。认为欧利坨子地区沙三 段油气的富集源于充足的油源良好的输导体系以及优良的能量配置的黄金组合。其成藏模式是以垂向运移为主和短距离的侧向运移为辅。而铁匠炉地区油气运聚模式有别于欧利坨子地区油气运移通道以连通砂体为主,而沿断层的垂向运移很弱。从而造成其油气主要分布在沙三中下段。

The Hydrocarbon Accumulation Model of Middle Segment in Dongbu (Eastern) Sag of Liaohe Basin

The complex faulting system and abnormally active volcanic process make the middle segment of Dongbu sag in Liaohebasin possess unique hydrocarbon accumulation model.Establishment of such a model is based on relationship between the vol-canic process and hydrocarbons in it and the analysis of reservoir rocks and spatial distribution.Study shows that Sha-3 layer of Oulituoz area is rich in petroleum due to premiere assemblages among enough oil sources, fair transport system and fine energyconfiguration. The petroleum accumulation model is characterized by vertical migration assisted with lateral short-distance migration.But in Tiejianglu area, petroleum migration and accumulation are different from those in Oilituoz area,its channel media forpetroleum migration are dominated by interconnected sands with little vertical migration along the faults,thus resulting in petroleum distribution primarily in the middle-lower section of Sha-3 layer.