摘要
欢喜岭油田锦99块杜家台油藏属于辫状河三角洲前缘沉积,为目前处于注水开发中后期的稠油油藏,其构造复杂、断层发育、储层物性较好,但非均质性强.为确定各砂体沉积微相类型、空间展布特征,以及沉积微相与含油性关系,在岩心观察的基础上,结合钻井、测井、录井、岩石分析、试油试采和生产动态化验资料,分析研究区沉积微相特征及其与含油性关系.结果表明:该区为一套完整的水进体系沉积,包括水下分流河道主体、水下分流河道侧缘、河道砂坝、水下分流间湾、席状砂、湖相泥等6种沉积微相类型;沉积微相对储层含油性具有明显控制作用,其中水下分流河道主体和河道砂坝微相含油性较好,为油气聚集的有利沉积微相;席状砂和水下分流河道侧缘微相含油性较差.研究结果指明油田下一步勘探有利储集沉积砂体的方向,对油田后续注水开发具有指导意义.
Jin 99 block of Dujiatai reservoir,which is heavy oil reservoir in the mid-to-late stage of waterflood development,in Huanxiling oilfield could be regarded as braided-river delta front facie with complex structure and fault system as well as good reservoir properties in spite of the strong heterogeneity.On the base of core observation and combined with drilling,logging,well logging,rock analysis,oil testing and production dynamic test data,this paper makes clear the types of sedimentary microfacies and spatial distribution of the sand body and the relationship between sedimentary microfacies and oilbearing properties.The results indicate that this area is a complete trangressive system deposition including 6kinds of sedimentary microfacies,which are underwater distributary channel subject,underwater distributary channel side edge,channel mouth bar,subsea interdistributary bay,sand sheet and lacustrine mud.The types of sedimentary microfacies are considered to have significant control on the oilbearing of the reservoir.Compared with sand sheet and underwater distributary channel side edge who have inferior oil-bearing property,underwater distributary channel subject and channel mouth bar have better oil potential and contribute to the accumulation of oil and gas.The research results point out the future exploration direction to favorable reservoir sedimentary sand body and provide guidance for the subsequent waterflood development in the oilfield.
出处
《东北石油大学学报》
CAS
北大核心
2014年第5期78-85,9-10,共8页
Journal of Northeast Petroleum University
基金
国家科技重大专项(2011ZX05009-003)
关键词
辫状河三角洲前缘
沉积微相
储层含油性
杜家台油层
欢喜岭油田
braided-river delta front
sedimentary microfacies
oil-bearing of reservoir
Dujiatai reservoir
Huanxiling oilfield
