地层不整合油气输导模式探讨——以济阳坳陷为例  

Approach to Oil-Gas Migration Patterns in Stratigraphic Unconformity——An example from Jiyang depression

作　　者：陈涛[1] 蒋有录[1] 

机构地区：[1]中国石油大学地球资源与信息学院,山东东营257061

出　　处：《新疆石油地质》2008年第5期578-580,共3页Xinjiang Petroleum Geology

基　　金：中国石化重点科技攻关项目;济阳坳陷第三系不整合油气藏形成与分布规律(P06012)资助

摘　　要：对济阳坳陷不整合结构及其矿物学、元素地球化学和孔渗等地质特征分析研究后,发现不整合面下砂岩、碳酸盐岩、变质岩等裂缝、孔隙发育,形成高孔、高渗带,而泥岩由于后期的成岩作用,裂缝、孔隙均被重结晶泥质充填,不具渗透性。不整合面下的高孔、高渗带成为油气长距离运移的主要通道,在岩心、镜下均可见到风化岩石裂缝、孔隙中残留的原油。并建立了济阳坳陷不整合的2种油气输导模式:不整合结构层侧向输导模式、不整合"天窗"式垂向输导模式。The pore and fracture are widely developed in sandstone, carbonate rock and magmatite under unconformity, which tend to forming high porosity and high permeability belts, while those in mudstone are filled by reerystallization due to deuterodiagenesis without permeability. These belts are possible to shape the main passageway of long-distanee oil migration because crude remained in the fraetures and pores can be seen by core and mieroseopie observation. This paper presents the process of stratigraphie reservoir＇s oil accumulation in south slope of Dongying sag, and sets up two types of oil-gas migration patterns under unconformity： one is lateral migration pattern, and the other is clearstory-like vertical migration pattern.

关 键 词：济阳坳陷 不整合 地质特征 孔渗特征 输导模式 

分 类 号：TE112.2[石油与天然气工程—油气勘探]