济阳坳陷古近系－新近系泥质岩盖层及其与油气的关系  

Tertiary capping rock types and its relationship to oil and gas accumulation in Jiyang depression

作　　者：尹丽娟[1] 

机构地区：[1]中国石化股份胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2012年第2期12-15,111-112,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家重大科技专项“渤海湾盆地精细勘探关键技术”(2008ZX05006)

摘　　要：为了加强对盖层的研究,在泥质岩盖层演化的基础上,综合考虑裂缝和断层对盖层的改造程度,分析不同类型泥质岩盖层对油气富集程度的影响。根据埋深与压实程度、裂缝和断裂对泥质岩盖层封闭性的影响,将济阳坳陷古近系—新近系泥质岩盖层分为孔隙性盖层、缝改盖层和断改盖层3个大类,7个亚类。不同类型泥质岩盖层封闭性不同,孔隙性盖层整体较好,缝改盖层局部遭受破坏,断改盖层差中有好。通过对泥质岩盖层与济阳坳陷古近系—新近系已探明油气藏关系的分析认为,济阳坳陷古近系—新近系油气藏主要位于缝改盖层、断改盖层与缝改盖层转换带、断改盖层与孔隙性盖层转换带、缝改盖层与孔隙性盖层转换带中。济阳坳陷油气富集主要受控于泥质岩盖层的不同叠置组合类型,储层下方或下倾方向盖层的破坏以及储层上方或上倾方向盖层的相对有效封盖(封闭性应好于储层下方或下倾方向)是控制油气富集的重要因素。The capping mud rock can be divided into porous,fracture reformed and fault reformed types,and subsequently 7 categories,based on the characteristic of evolution and reform of Tertiary mud rock in Jiyang depression.Generally,the porous capping is best,and fracture reformed secondary,and lastly fault reformed capping.Based on the study of relationship between capping rock and hydrocarbon accumulation,it is demonstrated that the reservoir is mainly located in the fracture reformed capping and switching belt of these three capping types,that is,from fault-reformed to fracture-reformed belt,from fault-reformed to porous capping belt,and the fracture-reformed to porous capping.The oil and gas accumulation is controlled by different combination types of capping rock cover in Jiyang depression.The important factor of controlling oil and gas accumulation is the combined effect between damage of capping under the reservoir and effective sealing above the reservoir.

关 键 词：泥质岩 盖层类型 封闭性 油气富集 济阳坳陷 

分 类 号：TE112.25[石油与天然气工程—油气勘探]