关键词: 聚合物段塞, 聚合物驱, 残余阻力系数, 数学模型, 胶结物质, 调剖, 交联剂, 交联反应, 物化现象, 采收率

Abstract: This paper presents a two-dimensional (cross-section or plane) 2 phases (aqueous and oleic) multicomponent (seven components at least: water,oil, polymer, crosslinker, gel, monovalent and divalent cations) in-situ polymer gelation mathematical model. It takes the reaction of polymer-crosslinker and gel blockage of high permeability channel into concider action in addition to the phenomena involved in polymer flooding (viscosity, mobility reduction, residuel resistance,absorption, dispersion, inacces sible pores, rheology, salinity effect, etc). This model can be used to simulate water or polymer flooding and in-situ gelation process. Its application demonstrates that it is a very useful tool for studying different mechanisms, forcasting displacement performance and oil recovery, and designing the operation plan (such as kinds of their chemicals concentration, and quantity, injection strategy, operation parameters, etc) in such a technique. The examples in this paper give the results that the oil recovery by using gelation technique is better than that either by water or polymer flooding for a stratified reservoir with strong permeabilty difference between each layer, and the improvement of oil recovery depends on the depth of the blockage into the formation directly.