特高含水期沉积微相划分及其单砂体分布--以喇嘛甸油田SⅡ油层组为例  

Sedimentary microfacies to mono-sandstone body in high water cut stage——taking PⅡ oil-bearing formation of Lamadian oil field as an example

作　　者：王一博[1] 马世忠[2] 王兴岩[3] 刘海峰[4] 

机构地区：[1]中国石油大学资源与信息学院,北京102249 [2]大庆石油学院地球科学学院,黑龙江大庆163318 [3]由国石油辽河油田分公司兴隆台采油厂,辽宁盘锦124011 [4]长庆油田分公司勘探开发研究院,陕西西安710021

出　　处：《大庆石油学院学报》2008年第1期12-14,93,共4页Journal of Daqing Petroleum Institute

基　　金：中国石油天然气股份有限公司科技风险创新研究项目[油科函字(2004)32-KF3]

摘　　要：进入特高含水期的油田开发层系水淹严重,剩余油呈高度分散状态,致使挖潜难度越来越大.应用加密井网条件下岩心和测井资料,以单砂体为单元进行沉积微相研究,为认识剩余油分布提供实用、有效的手段.岩心及测井资料研究结果表明,喇嘛甸油田SⅡ油层组发育河流-三角洲分流平原和前缘亚相沉积,三角洲分流平原亚相细分为分流河道、废弃河道、决口河道、溢岸薄层砂、分流河道间等微相,三角洲前缘亚相细分为水下分流河道、水下废弃河道、水下决口河道、水下漫流砂和水下分流河道间等微相.通过沉积时间单元精细划分、对比,结合岩心资料,建立测井沉积微相模式,确定沉积微相展布特征,分析单砂体的空间分布规律,为油田高含水期剩余油预测、开发调整提供可靠的地质依据.While oil field enters into extra high water stage,water-flooding is getting more serious in layer series of development,remaining oil in reservoir rocks becomes high dispersive,which makes tapping potentiality more difficult.In the highly dense well pattern,well logging and drilling core datum are employed to study in detail the sedimentary microfacies to monosandstone body,which provides effective approach for recognizing the distribution of remaining oil.A large amount of well logging and drilling core information demonstrates that SⅡ oil-bearing formation of Lamadian oil field develops delta plain and delta front.Delta plain can be divided into distributary channel microfacies,abandoned channel microfacies,crevasse channel microfacies,sheet sand microfacies,interdistributary microfacies and so on,delta front mainly develops sedimentary microfacies of submerged distributary channel,submerged abandoned channel,submerged crevasse channel,submerged sheet sand and submerged interdistributary.By the division and correlation of depositional time unit,combined with analysis of core datum,logging sedimentary microfacies model is established.On the basis of it,the distribution feature of sedimentary microfacies is made definite and the space-time distribution characters of mono-sandstone body are predicted.It provides important geological foundation for remaining oil forecast and development adjustment of oil fields.

关 键 词：喇嘛甸油田 SⅡ油层组 沉积时间单元划分与对比 沉积微相 单砂体 

分 类 号：TE121.1[石油与天然气工程—油气勘探]