摘要
特高含水期砂岩油藏中普遍出现高渗条带,为研究高渗条带控制下剩余油分布特征,在储层高渗条带动静态特征分析的基础上,建立二维刻蚀模型,通过微观驱替试验研究不同级别高渗条带控制下注入水波及及微观剩余油赋存特征。研究结果表明,对于存在高渗条带的模型,增大驱替速度仅对绕流式剩余油的挖潜有效,而对包围式簇状、并联式喉道状、死角式点状剩余油影响不大,说明单纯提高驱替速度已不能作为动用高渗条带下剩余油的有效方式,研究结果为特高含水期油藏提高剩余油采收率提供了理论基础。
High-permeability zone are commonly found in sandstone reservoirs with very high water cuts.In order to study the distribution characteristics of residual oil under its control,based on the analysis of static and dynamic feature of relatively high-permeability zone,2D etching model is established.Water spreading and micro residual oil existing characteristics are studied under different level high-permeability zone and different injecting rate of macro water flooding test.The result shows when high-permeability zone existing,enlarging injecting rate can help around residual oil to be recovered,but useless to surround type cluster,parallel throat and blind angel type dot micro residual oil.Simply enlarging the injecting rate can t recover the residual oil under the control of high-permeability zone,the result provide a theory base to enhancing residual oil recovery at high-water-cut period.
作者
佟颖
贾元元
TONG Ying;JIA Yuan-yuan(Sinopec Research Institute of Petroleum Engineering Technology,Beijing 100101,Chin;Exploration and Development Research Institute,Sinopec Shengli Oilfield Branch,Dongying 257015,China)
出处
《科学技术与工程》
北大核心
2018年第28期80-86,共7页
Science Technology and Engineering
基金
国家"十三五"科技重大专项(2016ZX05011-001)资助
关键词
高渗条带
刻蚀模型
微观剩余油
赋存特征
high-permeability zone
etching model
micro residual oil
existing characteristic
