摘要
采用非均质微观仿真模型,针对非均质条件下不同特征水驱残余油,研究聚合物/表面活性剂(SP)二元体系微观驱油机理及其驱油效率。为了更好地研究SP二元体系,利用相同的方法对聚合物、表面活性剂的驱油机理和驱油效率进行了研究。结果表明,SP二元体系兼具聚合物和表面活性剂的特性,不仅能够启动连片状、柱状、膜状和孤岛状残余油,还能依靠自身较高的黏弹性和一定的乳化性能启动盲端残余油。在非均质条件下,SP二元体系既能有效地改善流度比,扩大波及体积,一定程度上启动低渗层;又能利用活性剂的洗油能力提高驱油效率,大幅度提高采收率。该研究对深入探讨非均质条件下的复合体系驱油机理及现场应用具有指导意义。
By using a heterogeneous microscopic simulation model which directed at different residual oil distribution characteristics of heterogeneous reservoirs,a study on polymer/surfactant（SP）binary system oil displacement mechanism and efficiency has been carried out.In order to improve the study of SPsystem,this paper applied the same method to study the oil-displacement mechanism and efficiency of polymer and surfactant.It turned out that the SP binary system has both of the polymer and surfactant system characteristics.It not only promotes the consecutive,cylindrical,membranous and isolated-island residual oil,but also drives the block residual oil which relied on its own higher viscoelasticity and certain emulsification ability.Under the heterogeneous condition,the SPbinary system improves the mobility ratio effectively,expand swept volume and start residual oil in low permeability reservoir to a certain degree.What＇s more,it also improves oil displacement efficiency basted on the oil-washing capacity of its activator to make the oil recovery improved vastly.This research has great significance in deep research of the composite system displacement mechanism under heterogeneous conditions and field application.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2010年第6期84-88,共5页
Oil Drilling & Production Technology
基金
国家重点基础研究发展计划(“973”计划)项目“化学驱和微生物驱提高石油采收率的基础研究”(编号:2005CB221300)的部分内容
关键词
微观模型
非均质
残余油
二元体系
驱油机理
microscopic model
heterogeneous
residual oil
binary system
oil-displacement mechanism
