注水油田高含水期流场重构模型研究与应用  

Research and Application of Flow Field Reconstruction Model in High Water Cut Period of Water-Flooding Oilfield

作　　者：张静 刘玉娟 刘东 刘斌 瞿朝朝 ZHANG Jing;LIU Yujuan;LIU Dong;LIU Bin;QU Zhaozhao(Tianjin Branch of CNOOC Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《重庆科技学院学报（自然科学版）》2021年第1期6-10,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：“十三五”国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058001);中海石油(中国)有限公司科研项目“海上砂岩油田剩余油地质成因及精准挖潜研究”(YXKY-2019-KFSC-01)。

摘　　要：海上油田在高含水阶段形成固定流场,常规注水方式很难根据注水效果、流场分布区域来定量调整单井注水量,注水效果因此逐年变差。以渤海S油田为研究对象,运用流线数值模拟技术,以井组为单元定量分析各油水井间的流线分布、注采分配因子,建立了单井注水量增长函数优化模型,通过定量调整单井注水量进行流场重构,从而提升驱油效率。现场应用结果显示,井组含水率下降了6.0%,油产量增加50 m^(3)/d,年累计增油1.0×10^(4)m^(3)。When the offshore oil field enters the stage of high water cut,the inherent flow field is formed. It is difficult for conventional water injection mode to adjust the water injection quantity of a single well according to the water injection effect and flow field distribution area,and the effect is getting worse year by year. Taking S Oilfield in Bohai Sea as the research object and well group as the calculation unit,the streamline distribution and injection production distribution factors among oil and water wells are quantitatively analyzed by using streamline numerical simulation technology. For improving oil displacement efficiency,the optimization model of single well water injection growth function is established,and the flow field is reconstructed by adjusting the water injection quantity of single well quantitatively. Field application results show that the water cut of the well group decreases by 6. 0%,the daily oil production of the well group increases by 50 m^(3)/d,and the cumulative oil production increases by 1. 0 × 10^(4)m^(3).

关 键 词：油田注水 流场 流线模拟 单井注水量 模型优化 驱油效率 

分 类 号：TE341[石油与天然气工程—油气田开发工程]