点坝砂体内部建筑结构定量分析方法研究  

Study on Quantitative Analysis Method of Internal Building Structure of Point Dam Sand Body

作　　者：张善义[1] 杨为华[1] 于宏宇[1] 兰金玉 陈雷[1] ZHANG Shan-yi;YANG Wei-hua;YU Hong-yu;LAN Jin-yu;CHEN Lei(N0.5 Oil Production Plant of PetroChina Daqing Oilfield Company,Daqing,Heilongjiang 163513)

机构地区：[1]中国石油大庆油田有限责任公司第五采油厂,黑龙江大庆163513

出　　处：《河北地质大学学报》2018年第6期47-51,共5页Journal of Hebei Geo University

基　　金：国家科技重大专项"大庆长垣特高含水油田提高采收率示范工程"(2016ZX05054)

摘　　要：曲流点坝是河流相最重要的储集砂体,而点坝砂体内部夹层是剩余油的主要控制因数。针对大庆油田特高含水后期、产量递减快、点坝砂体剩余油分布复杂等问题,通过砂岩厚度变化、渗透率变化、孔隙度变化、砂体层位变化等方法精细描述废弃河道和点坝砂体平面分布特征,以野外露头和现代沉积为指导,以岩心资料、测井资料和经验统计公式等为依据,定量求取点坝砂体内部界面的倾角、侧积体规模、曲率、波长、振幅、跨度等参数,系统定量的建立起曲流河点坝砂体建筑结构模型,并确定了剩余油的分布位置,平面上剩余油主要分布在废弃河道边缘,垂向主要分布在点坝的上部,对后期点坝砂体内部剩余油定量描述和挖潜具有重要的指导意义。Point bar is the most important reservoir sand of the fluvial facies,whose interlayer of is the main factor of controlling the remaining oil distribution.After entering a extra-high water cut stage,the production of Daqing Oilfield is decreasing rapidly,and the remaining oil distribution of point bar is complicated in Daqing Oilfield.In view of the above problems,this paper has fine description of the plane distributive characteristics of abandoned channel and point bar by such means as sandstone thickness change,permeability change,porosity change,sand horizon change.Guided by outcrops and modern sediments,this paper has gotten the inclination,scale of lateral accretionary body,curvature,wavelength,amplitude and spans quantificationally on the basis of the core data,well logging data and empirical statistical formulas.Besides,it has established the building structure model of point bar and found remaining oil in the point bar.The remaining oil is distributed in the edge of abandoned channel and vertically in the upper part of the point bar.This method has important guiding significance for quantitative description and potential tapping of residual oil in the point bar.

关 键 词：曲流河 点坝 界面 建筑结构 夹层 

分 类 号：TE34[石油与天然气工程—油气田开发工程]