摘要
特高含水后期储集层油水两相渗流能力差异大,储集层动态非均质性强,以渗透率等静态参数作为主要指标的注水井层段细分方法和以经验分析为主的层段配水方法,难以满足多层砂岩油藏精准开发的需求。通过理论分析、物理模拟及数值模拟,深化了对特高含水后期油田渗流特征认识,构建油藏小层渗流阻力计算模型,以单井渗流阻力变异系数最小为目标,建立近阻注水井层段优化组合方法;构建层段剩余储量系数、合理注采比系数、相对注水效率系数及含水率上升速度系数,形成特高含水后期层段注水定量调整方法,解决了多井、多层、复杂注采关系条件下定量注水的难题。在典型区块应用,试验237井次,初期含水率下降0.14%,增油控水效果较好。
For the reservoirs in late development stage with ultra-high water cut,which exhibit significant difference in the oil-water two-phase flow capacity and strong dynamic reservoir heterogeneity,the injector interval subdivision method based on static parameters such as permeability and the interval water allocation method using empirical analysis are insufficient to meet the requirements of precise develop-ment of multi-layered sandstone reservoirs.Through theoretical analysis,physical simulation,and numerical modeling,the flow behaviors in the oilfields in late development stage with ultra-high water cut were further understood.A flow resistance calculation model for reservoir lay-ers was developed,and aiming at minimizing the variation coefficient of flow resistance in single wells,a method for water injection interval optimization based on flow resistance was established.Additionally,by constructing coefficients of remaining reserves,reasonable injection-production ratio,relative water injection efficiency,and water cut rising rate for intervals,a quantitative adjustment method for water injec-tion in the intervals with ultra-high water cut was developed.This method allows for quantitative water injection under conditions involving multiple wells,multiple layers,and complex injection-production relationships.The method was tested 237 times in wells of a typical block,with a decrease in initial water cut by 0.14%,demonstrating a satisfactory performance in both water control and oil increasement.
作者
单高军
王承祥
王治国
姜雪岩
郭军辉
SHAN Gaojun;WANG Chengxiang;WANG Zhiguo;JIANG Xueyan;GUO Junhui(Research Institute of Exploration and Development,Daqing Oilfield Company Limited,PetroChina,Daqing,Heilongjiang 163712,China)
出处
《新疆石油地质》
CAS
CSCD
北大核心
2023年第4期435-441,共7页
Xinjiang Petroleum Geology
基金
国家科技重大专项(2016ZX05054)。
关键词
特高含水后期
非均质性
渗流阻力
层段优化
注水效率
水量调整
剩余储量
late development stage with ultra-high water cut
heterogeneity
flow resistance
interval optimization
water injection efficiency
water volume adjustment
remaining reserves
