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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.
The focus of exploration and development in the Northern Jiangsu Basin is gradually shifting from seeking tectono-logical reservoirs to finding subtle reservoirs, and the lithologic sand bodies formed by gravity flow deposition are increasingly important for the exploration of subtle reservoirs. With core, logging-logging, seismic reflection Characteristics and other data on the sedimentary sand body and its genesis of Dainan Formation in Huangjue-Majiazui area at the southwestern tip of Gaoyou Sag in Subei Basin of the Subei Basin. The results show that the sedimentary sand bodies in the first member of Dainan Formation in this area mainly develop nearshore alluvial fans , Slump-turbidite fan deposition, and the sedimentary period of the second member of Dainan Formation mainly includes the deposition of fan delta and slip-turbidite fan.The development and unique tectonic pattern of these sedimentary sand bodies, active tectonic setting, external force activities And other factors are closely linked. The discovery of slump-turbidite fan provides the basis and train of thought for further oil and gas exploration.