西南石油大学学报（自然科学版）Issue(1)：21-30,10.DOI:10.11885/j.issn.1674-5086.2013.07.02.01
潍北凹陷构造演化对沉积成藏的控制作用
Controlling Effect of Tectonic Evolution on Deposition and Hydrocarbon Accumulation in Weibei Sag
摘要
Abstract
The complexity of tectonic evolution in Weibei Sag results in unclear understanding of its deposition and hydrocarbon accumulation law. Based on comprehensive analysis of well drilling,logging and seismic data,we analyzed the boundary fracture characteristics and sedimentary evolution in Weibei Sag. Studies show that due to the Tan-Lu fault zone continuing activities,Weibei Sag experienced four evolutionary stages:Sinistral strike-slip,Sinistral-Dextral conversion,Dextral strike-slip and regional depression. The sinistral strike-slipping(Ek3)formed igneous basement,established the tectonic pattern of Weibei Sag by sinking in the north and overlapping in the south. The basin hydrocarbon source rocks and fan-delta came from E W fan delta in sinistral-dextral conversion period(Ek2). The main reservoir-cap combination formed in dextral strike-slip period(Ek1 Ed). The convex′s ancient landforms characteristic formed from it controlled the hollows filling and the growth characteristic of fan-bodies;deposition center from bottom to top evidently migrated eastward compared to subsidence center. The Zaohu broken nose band is the main oil and gas migration and accumulation area. Tectonic uplift movement in Es4 last stage led to rich oil and gas distributed in east and poor distribution in west. Accumulation mode is different between east and west. Reservoir model of eastern region is single hydrocarbon accumulation period,bilateral transporting and lateral migration. Reservoir model of western region is two hydrocarbon accumulation periods and near source gathering.关键词
沉积充填/构造演化/成藏模式/左右旋转换/潍北凹陷Key words
sediment filling/tectonic evolution/hydrocarbon accumulation model/sinistral-dextral conversion/Weibei Sag分类
能源科技引用本文复制引用
孙耀庭,李玉兰,徐昊清,郭丽丽..潍北凹陷构造演化对沉积成藏的控制作用[J].西南石油大学学报（自然科学版）,2016,(1):21-30,10.基金项目
国家科技重大专项（2011ZX05006）；中国石化重点攻关课题（P11061）。 （）
