子北油田赵家台地区长6^1和长4＋5^2储层非均质性研究  

Reservoir heterogeneity of Chang4+5~2 and Chang6~1 of Zhaojiatai area in Zibei oilfield,Ordos Basin

作　　者：张凤奇[1] 武富礼[1] 罗然昊[2] 于建青 何文忠[2] 

机构地区：[1]西安石油大学油气资源学院,陕西西安710065 [2]陕西延长石油(集团)有限责任公司,陕西西安710075

出　　处：《油气地质与采收率》2011年第6期42-45,49,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家"十一五"科技支撑计划"低(超低)渗透油藏气驱可行性研究及先导试验研究"(2007BAB17B05)

摘　　要：通过铸体薄片、扫描电镜、压汞分析、岩心分析及测井解释等,对子北油田赵家台地区延长组长61和长4+52储层非均质性进行了研究。研究结果表明,赵家台地区长61和长4+52储层宏观层内、层间、平面及微观非均质性均较强,其变化规律主要受控于沉积相带和成岩作用。层内非均质性主要受沉积韵律和层内夹层影响,层间非均质性取决于层间隔层展布和储层物性变化,平面非均质性与砂体在平面上的几何形态及其连通方式和连通程度密切相关,孔喉结构的复杂性直接影响储层微观非均质性,中孔细喉型、小孔细喉型为有效孔喉类型,微孔微细喉型为差孔喉类型。Based on casting thin section identification,scanning electronmicroscope,mercury-injection test,core analysis and log interpretation etc,the heterogeneity of Chang4+52 and Chang61 reservoir of Yanchang formation in Zhaojiatai area of Zibei oilfield is studied.It is shown that,there is stronger innerbed,interbed,planar and microscopic hetergeneity in the reservoir,it is controlled mainly by sedimentary facies zone and diagenesis.The innerbed heterogeneity is affected mainly by sedimentary rhythm and interlayers.The interbed heterogeneity is affected by the distribution of barriers and the variation of reservoir property.The planar heterogeneity is closely related with the morphology and connectivity degrees of sand-bodies.Complex pore throat structure affects directly microscopic heterogeneity in the reservoir,and medium pore-fine throat and small pore-fine throat are effective pore- throat types and micropore-micro fine throat is weak pore-throat type.

关 键 词：储层非均质性 延长组 夹层 赵家台地区 子北油田 

分 类 号：TE121.3[石油与天然气工程—油气勘探]