束鹿凹陷西斜坡沙二段油藏分布规律及成藏模式

束鹿凹陷西斜坡位于冀中坳陷南缘,是一个典型的东断西超窄陡型斜坡带。其资源转化率低,勘探潜力较大。结合区域地质背景分析,应用高分辨率层序地层学,储层沉积学及石油地质学原理与方法,采用地质与地球物理学结合的新理论与新技术的手段,利用钻井、测井及地震资料,深入分析了区内沙二段油气藏类型、分布规律和成藏模式。研究认为束鹿斜坡外带沙河街组地层遭受剥蚀,坡上不整合带是斜坡带常见的油气聚集场所,主要发育地层油藏以及少量岩性油藏。在斜坡带内带的鼻状构造和断块,为有利的油气聚集区。而且砂砾岩体厚度大、连通性好,因此在断层和岩性双重因素的控制下易形成构造-岩性复合油气藏。并总结了断裂坡折带砂体上倾尖灭型成藏模式,顺、反向断层联合控藏和断块鼻状构造隆起成藏模式等模式,对束鹿西斜坡勘探方向具有一定的指导作用。

Reservoir distribution and hydrocarbon accumulation patterns in the second member of Palaeogene Shahejie formation in the west slope of Shulu Sag

The west slope of the Shulu Sag is located at the south rim of the Jizhong Depression,and is a typical narrow and steep slope faulted to the east and onlapped to the west.The sag has a low transformation rate of resources and high exploration potential.This paper deeply analyzes the type,distribution and hydrocarbon accumulation pattern of the Es2 reservoirs in this area based on regional geological setting,using principles and methods of high resolution sequence stratigraphy,reservoir sedimentology and pet...