赵凹油田泌304区下层系沉积微相精细研究  

Fine studies of sedimentary microfacies on lower series of Bi-304 area in Zhaowa oilfield

作　　者：胡书奎[1] 杨璐[1] 姚国平[1] 武雅黎[2] 纪善良[3] 吴红松[4] 

机构地区：[1]中国石化河南油田分公司石油勘探开发研究院,河南郑州450046 [2]中国石化河南油田分公司石油工程技术研究院 [3]中国石化河南油田分公司采油二厂 [4]中国石化河南油田分公司采油一厂

出　　处：《石油地质与工程》2015年第3期61-63,68,147,共5页Petroleum Geology and Engineering

摘　　要：赵凹油田泌304区储层属于近源快速混杂堆积的水下扇沉积,扇体厚度大,横向岩性变化快,导致传统测井电性特征很不明显。砂砾岩体一般是多期发育、多次沉积形成的,其内部地质结构和油水关系十分复杂,油层分布研究难度大。运用传统沉积相研究方法,进行了单砂体刻画和精细沉积微相研究,结合动态生产资料及孔渗图对编绘的单砂层微相图做出修正,对同时期沉积的不同砂体在平面上的分布、连通关系及非均质性进行了精细刻画,并编绘了含油层平面图。成果现场应用后,解决了本区长期以来存在的注水方向不清、油井受效不明显、部分井含水高、采出程度低等生产问题。Reservoirs of Bi-304 area in Zhaowa oilfield belong to underwater fan deposit of proximal and fast slumping accumulation,with big fan body thickness and fast transverse lithologic changes,and this can lead to poor physical properties and oil-bearing characteristic,strong heterogeneity and non obvious traditional logging electrical characteristics.As the glutinite bodies are generally of multiphase development and through multiple sedimentary formations,the internal geological structure and oil/water relationship are very complex,and therefore there is great difficulty in reservoirs distribution.By using traditional methods of sedimentary facies,the studies on single sand body features and fine sedimentary microfacies have been carried out.In combination with the dynamic production data and porosity-permeability chart,the revision on single sand microfacies figures has been made.Based on this,the fine description of the plane distribution of different sand bodies under the same period,as well as the description of the connecting relation and heterogeneity has been conducted and therefore,the plane figures of the oil-bearing layers have been made.After field application,many production problems such as unclear direction of water injection,non-obvious oil wells effect,high water cut in some wells and low recovery degree have been solved,which lays a solid geological foundation for well pattern adjustment and achieve the purpose of good oil wells effect and enhanced oil recovery rate and production rate.

关 键 词：赵凹油田 泌304区 砂砾岩体 沉积微相 油层分布 

分 类 号：P618.13[天文地球—矿床学]