松辽盆地南部白垩系泉头组-嫩江组沉积层序特征与地层-岩性油气藏形成条件

Depositional sequences and forming conditions of the Cretaceous stratigraphic-lithologic reservoirs in the Quantou-Nengjiang Formations, South Songliao Basin

白垩纪松辽湖盆沉积类型属潮湿带近海坳陷型。松辽盆地南部已探明石油地质储量分布于四大河流三角洲沉积体系 ,含油层段主要分布于二级、三级层序的湖侵体系域和高位体系域 ,油气藏类型为构造油气藏和复合油气藏。随着油气勘探的进展 ,地层 岩性油气藏是重要的勘探目标。西部斜坡区具有形成地层 岩性油气藏的条件。图 3表 1参

The Cretaceous Songliao Lake was developed in a humid climatic zone and near off-shore depressed basin. The proved oil reserves in the southern Songliao Basin are distributed in four giant fluvial-deltaic depositional systems. The oil-bearing intervals are mainly developed in the lacustrine transgressive systems tract and high-stand systems tract of the second-order and third-order sequences. The structural and composite types of oil reservoirs are mainly formed. With the advance of hydrocarbon exploration, the stratigraphic and lithologic oil reservoirs are becoming important play targets. The stratigraphic and lithologic oil reservoirs could be formed on the West Slope Area.