【摘要】 鹤山凹陷位于南海北部大陆边缘下陆坡,其东南侧紧邻西北次海盆,具有地壳减薄、岩石圈韧性变形、高热流异常等不同于陆架区凹陷的特殊地质条件,因而具有特殊的沉积充填特征。层序地层学及地震相研究表明,鹤山凹陷古近系沉积文昌组、恩平组和珠海组地层,各组顶底界面均为大型不整合界面;文昌组、恩平组沉积时期鹤山凹陷为陆相湖盆沉积,其中深湖相泥岩地震反射特征与白云凹陷湖相烃源岩相似,是鹤山凹陷的主要烃源岩;珠海组沉积时期为浅海三角洲沉积,其地震反射特征为典型的"S"型前积反射,三角洲砂岩为鹤山凹陷的主要储层。此外,三角洲下方的重力流深水扇砂岩也有可能成为良好的储层。更多还原

【Abstract】 Heshan Sag was located in lower continental slope of northern margin of the South China Sea , its south side was close to the NW subbasin , it had special geological conditions such as thinning crust , ductile deformation of the lithosphere and high heat flow anomalies.Therefore Heshan Sag had special characteristics of depositional filling.Sequence stratigraphy and seismic facies studies show that Wenchang , Enping and Zhuhai Formations are developed in the Paleogene of Heshan Sag , the top and base of the formation are large unconformity.Terrestrial lacustrine deposition is developed during Wenchang and Enping Formations , in which the seismic reflection characteristics of middle-deep lacustrine mudstone are similar to the source rock of Baiyun Sag , it is the main hydrocarbon source rock in Heshan Sag , the shallow marine delta deposits are developed in Zhuhai Formation with " S " Type of progradational reflections , delta sandstone is the main reservoir in Heshan Sag.In addition , There exist the gravity flow deepwater fan sands更多还原