特高含水期油田化学驱提高采收率方法研究  

Study on the Method of Enhanced Oil Recovery by Chemical Flooding in Ultra-high Water Cut Oilfields

作　　者：桂琳[1] 戴昊南 万千 邓琳 GUI Lin;DAI Hao-nan;WAN Qian;DENG Lin(No.1 Oil Production Plant of Qinghai Oilfield,Dunhuang 736202,China)

机构地区：[1]青海油田采油一厂,敦煌736202

出　　处：《当代化工》2021年第9期2145-2148,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金,基于分子动力学方法的聚合物驱油微观流动规律研究(项目编号:51874241)。

摘　　要：我国陆上油田大多处于油田开发后期,含水超90%,剩余油挖潜难度加大。为大幅度提高油田采收程度,探索了特高含水油田化学驱油方法。首先,对研究区进行分区对比地层厚度、砂岩厚度,精细描述储层分布规律;其次,基于不同区域储层孔喉结构、渗透率统计结果,分析储层非均质特征;最后,设计出与主力油藏相似的三维非均质物理模型,结合岩心分析实验资料,对化学驱不同质量分数、压力对驱油效果的影响进行了研究,总结出了化学驱油效率的变化特征。研究发现,化学驱可提高驱油效率8%左右。Most of China’s onshore oilfields are in the late stage of oilfield development, with water cut exceeding 90%. In order to further improve oil recovery, chemical flooding method was studied and applied. Firstly, the study area was divided into zones to compare the formation thickness and sandstone thickness, and the reservoir distribution law was described in detail. Secondly, based on the statistical results of pore throat structure and permeability in different regions, the reservoir heterogeneity characteristics were analyzed. Finally, a three-dimensional heterogeneous physical model similar to the main reservoir was designed. Combined with the experimental data of core analysis, the effect of different mass fraction and pressure on chemical flooding was analyzed. The effect of chemical flooding on oil recovery was studied, and the variation characteristics of chemical flooding efficiency were summarized. It was found that chemical flooding could improve oil displacement efficiency by about 8%.

关 键 词：化学驱 特高含水 采收率 方法研究 开发应用 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]