关键词: 数学模型, 交联聚合物驱, 双重介质, 数值模拟, 渗流规律, 提高采收率

Abstract: A polymer and crosslinking polymer displacement method is presented to enhance oil recovery of dual media reservoir.A two dimensional,two phases,five components,dual permeability and dual porosity mathematical model,which can solve polymer flooding and underground crosslinking polymer flooding in dual media reservoir are set up.The model incorporates many physicochemical process variables including viscosity resistance coefficient,absorption retention,dispersion,imbibition and so on.This model can be used to do a series of numerical calculations, analyze the percolation law of polymer in dual media reservoir,study the effect of polymer concentration and ration of fracture permeability to matrix permeability on oil displacement efficiency.By comparing the oil displacement efficiency of polymer flooding with that of underground crosslinking polymer flooding,some useful conclusions are drawn.Theoretical instruction and optimization method for polymer flooding and underground crossliking polymer flooding in dual media reservoir are presented in this paper.

Key words: mathematical model, crosslinking polymer flooding, dual media, numerical simulation, percolation law, EOR