高邮凹陷黄珏-马家嘴地区戴南组重力流沉积及其成因

苏北盆地勘探开发重点正逐步由寻找构造类油气藏向寻找隐蔽油气藏转变，重力流沉积形成的岩性砂体对隐蔽油气藏的勘探显得日益重要.以岩心、测-录井、地震反射特征等资料对苏北盆地高邮凹陷西南端黄珏-马家嘴地区戴南组沉积砂体及其成因进行研究，结果表明:该区戴南组一段沉积时期主要发育了近岸水下冲积扇、滑塌-浊积扇沉积；戴南组二段沉积时期主要发育了扇三角洲沉积、滑塌-浊积扇沉积.这些沉积砂体的发育与独特的构造样式、活跃的构造背景、外力活动等因素有着密切的联系；滑塌-浊积扇的发现为进一步的油气勘探提供了依据和思路. 

Gravity Flow Deposits and Its Genetic Mechanism of Dainan Formation in Huangjue-Majiazui District,Gaoyou Subbasin

The main exploration targets of petroleum prospecting in Subei Basin shift gradually from structural reservoirs to subtle reservoirs nowadays. As potential gas and oil-bearing reservoirs, gravity flow sediment prospecting becomes more important for subtle reservoirs exploration. Based on the core observation, well logging, seismic profile characters, gravity flow deposits developed in E₂d of Huangjue-Majiazui district in Gaoyou sag and their genies are studied. It is found that nearshore subaqueous alluvial fans and slump-turbidities developed in E₂d₁ in study area, while fan deltas and slump-turbidities developed in E₂d₂. The development of sandbodies is considered to be closely coordinated with the special structural pattern, special and active tectonic backgrounds. Discovery of slump-turbidities provides theoretical framework for oil and gas exploration.