Abstract: This paper presents an alkali/surfactant/polymer combined flooding numerical simulatorwhich has considered the main displacement mechanisms(such as decreasing of interfacialtension and chemical loss,controlling of mobility,etc)and physicochemical phenomena(chemical synergytic effects,alkaline consumption, chemical dispersion and adsorption/retention in alkaline environment,reactions,variation of residual saturations and relative permeabilities,behavior of polymer solution,etc).This model has a capacity of simulation realproblems and is a powerfuI tool for mechanism study,feasibility evaluation,injection plan optimization and performance prediction for chemical combined flooding process.

Key words: mathematical model, driving mechanism, enhanced oil recovery

摘要： 建立了一个碱/表面活性剂/聚合物夏合驱数学模型,它考虑了复合驱过程中各种主要的驱油机理（如降低界面张力、流度控制等）和物化现象（如化学剂的复合协同效应、碱耗、化学剂的扩散及碱环境下的吸附滞留损失、化学反应、残余饱和度和相对渗透率的变化、聚合物溶液的特性等）,具有较强的模拟现实问题的能力和实用性能.该模型软件的研制成功,为我国油田的复合驱辅助进行机理世研究、现场应用的可行性预测、实施方案的优选、动态预测等提供了一个有力的工具.

关键词: 数学模型, 驱油机理, 提高采收率