Abstract:

A thermal polymer displacement method is presented to used in the heavy oil reservoirs which had been displaced by thermal method.A three dimentional,three phases,four components,non isothermal flow model has been formulated to simulate thermal polymer process.The model incorporates process variables which include diffusion,adsorption,vicosity,relative permeability and so on.In solving this model with finite different method,the space derivatives in concentration and energy equations are treated with a second order approximation,and the non linear coefficients are pseudo linearlized.The software is made to simulate the thermal polymer process.This model was tested by an example and the results are satisfied.It is feasible to use thermal polymer displacement in reservoirs which had been displaced by thermal method.

Key words: thermal polymer, heavy oil, mathematical model, numerical simulation, software, EOR

摘要：

对热力驱后的油藏,提出了用热-聚合物驱油的方法来提高其采收率.建立了一个三维三相四组分非等温渗流的数学模型.该模型考虑了溶剂驱替过程中的对流、扩散现象,对该模型中所涉及的主要参数提出了易于应用的数学表达式;采用有限差分法对模型进行了求解.在求解时对浓度和能量方程中的空间项采用了二阶精度的差分格式;对时间导数项中的非线性系数进行了拟线性处理,编制了相应的数值模拟软件.经算例验证,表明对热力驱后的油藏进行热-聚合物驱是可行的,能够取得较好的效果.

关键词: 热—聚合物, 稠油, 数学模型, 数值模拟, 软件, 提高采收率