Abstract: Mathematical model of component transport in inter-miscible displacement of chemical flooding is built,in which the physical-chemistry parameters are modeled as chemical concentration dependent functions.Defining the parameter of "effective displacement zone size",the mechanism that many factors such as adsorption,diffusion-dispersion,slug size,displacement velocity influence on component transport processes and results are annualized and analyzed.The validity and durability of chemicals in Daqing ASP combination(Polymer HPAM,surfactant ORS-41,alkaline NaOH) are analyzed for the transport in porous media.The research achievements will not only be a guideline for engineering & technology project design and dynamic monitoring of combination,but also can replace partial flow displacement in laboratory and assisted mechanism investigation.The distinct feature of the developed simulator is the very skillful process of boundary conditions in the calculation of mathematical model in chemical slug projection,the results are more reliable and accurate by using finite differences solution of prediction and correction format.The reliability can be examined by corresponding physical simulation experiments(displacement).

Key words: chemical flooding, combination, transport in porous media, mechanism, validity, durability, model, simulation

摘要： 建立了化学驱互溶驱替组分输运数学模型,将模型中所需的物化参数描述为驱油剂浓度相关的函数.定义了“有效驱替带长度”参数,来量化和分析吸附、扩散弥散、段塞尺寸和驱替速度等多因素对组分输运过程与结果的影响机理.分析了大庆油田ASP复合驱常用驱油剂(表面活性剂ORS-41和碱NaOH)在孔隙输运过程中的有效性和持久性.研究成果不仅可以为复合驱工程工艺方案设计和动态监测提供指导,而且可用于代替部分实验室流动实验和辅助机理研究.研制的模拟软件的显着特点是对注化学剂段塞情况下的数学模型计算进行了十分巧妙的边界条件处理,用有限差分的预测-校正格式使计算结果更为准确可靠,其可靠性可用相应的物理模拟(流动)实验进行验证.

关键词: 化学驱, 复合驱, 孔隙输运, 机理, 有效性, 持久性, 模型, 模拟