松辽盆地南部黑帝庙地区油气成藏模式

Accumulation Model of Reservoirs in the Heidimiao Area in the Southern Songliao Basin

应用生物标记化合物m/z191萜烷、藿烷系列和m/z217甾烷系列进行了油源对比,证实下白垩统姚家组葡萄花油层油气来源于上覆地层嫩江组一段,嫩一段烃源岩生成的油气通过断裂运移到该油层。属于上生下储的组合型式,断裂是油气藏形成的主控因素,形成构造-岩性油气藏类型是其主要的成藏模式,该层是黑帝庙地区今后勘探的主要目的层。精细研究姚家组的断裂、低幅度构造与砂体间的配置关系,是今后突破该油层油气勘探的关键。

Applying biomarks of m/zl91 terpane-hopane series and sterane series, the authors analyzed the oil sources and suggested that the oil and gas of K1y1 came from the overlaid K1n1. The oil and gas generated in K1n1 migrated to the Putaohua oil layer of K1y1 through faults. The oil layer was of an assemblage type of upper source rocks and lower reservoirs. Faults were the main controlling elements. The main accumulation model of reservoirs was structural-stratigraphic trap and the Putaohua oil layer should be the main target layer for prospecting in the Heidimiao area in the future. The detailed research on the faults in K1y and the relationship between low-amplitude structures and sand deposits will be the key for oil and gas prospecting in future.