砂砾岩油藏聚合物驱试验效果评价及作用机理探讨——以呼和诺仁油田贝301区块南屯组油层为例  

Evaluation of polymer flooding in sand conglomerate reservoir and discussion of its mechanism——by taking Nantun formation, Bei block 301, Huhe Nuoren oilfield as an example

作　　者：饶华[1] RAO Hua(Development Technology Center of Hailar Petroleum Exploration & Development Headquarters,Daqing Oilfield Co.,LTD.,Hulun buir,Inner Mongolia 021000,China)

机构地区：[1]中国石油大庆油田有限责任公司海拉尔石油勘探开发指挥部

出　　处：《石油地质与工程》2019年第4期69-72,共4页Petroleum Geology and Engineering

基　　金：山东省沉积成矿作用与沉积矿产重点实验室开放基金资助(DMSM2017081)

摘　　要：砂砾岩油藏储层通常具有孔隙结构复杂、非均质性强等特征,高含水期砂砾岩油藏层内、层间及平面间矛盾突出,而常规技术难以有效控制含水上升速度,无法提高差油层的动用程度,油田开发效果逐年变差。为此,以呼和诺仁油田贝301区块南屯组高含水油层为主要研究对象,优化设计聚合物驱试验方案,开展为期3年聚合物驱现场试验。研究结果表明,试验油层综合含水下降大于10.0%,自然递减连续3年小于5.0%,阶段增油达3.75×10^4t,与水驱对比,阶段采收率提高8.5%以上,聚合物驱试验取得了良好的增油降水开发效果。Glutenite reservoirs are usually characterized by complex pore structure and strong heterogeneity.During the period of high water cut,the contradiction between layers and planes is becoming more prominent.Conventional technical measures are difficult to control the water cut rising rate of main reservoirs and cannot improve the utilization degree of poor reservoirs,which leads to the deterioration of oilfield development effect.Therefore,the high-water-cut oil reservoir of Nantun formation in Bei 301 block of Huhe Nuoren oilfield is taken as the main research object to optimize the design of polymer flooding test and carry out a 3-year field test of polymer flooding.The results show the comprehensive water cut of the test reservoir decreases by more than 10.0%,the natural decline is less than 5.0%for three consecutive years,and the stage oil increase reaches 3.75×10^4 t.Compared with water flooding,the stage oil recovery increases by more than 8.5%,and the field test of polymer flooding has achieved good oil increase and precipitation development effect.

关 键 词：呼和诺仁油田 砂砾岩油藏 高含水油层 驱油机理 

分 类 号：TE357.431[石油与天然气工程—油气田开发工程]