无碱二元驱提高波及因数和驱油效率对采收率贡献研究  

EOR Research on Enhancing Sweep Efficiency and Displacement Efficiency by Using Non-alkail Binary Combined Flooding

作　　者：肖传敏[1] 

机构地区：[1]中石油辽河油田分公司勘探开发研究院,辽宁盘锦124010

出　　处：《石油天然气学报》2014年第5期132-135,8,共4页Journal of Oil and Gas Technology

基　　金：中国石油天然气集团公司重大科技专项(2012E-3004)

摘　　要：无碱二元复合驱是今后化学驱发展的主要方向。为认清二元驱提高采收率机理,通过室内三维物理模拟试验,研究了无碱二元驱过程中非均质油藏波及因数与驱油效率的变化特征,并量化其对提高采收率的贡献程度。试验结果表明,中渗透层提高采收率幅度最高,低渗透层次之,高渗透层最低;饱和度场变化分析,二元驱高渗透层以提高驱油效率为主,低渗透层以提高波及因数为主,中渗透层以提高波及因数和驱油效率共同作用,初步得出驱油效率对最终提高采收率的贡献率为40%,扩大波及因数的贡献率为60%,可有效指导二元驱配方组合设计思路。Non-alkail binary combined flooding was the main development direction of chemical flooding. In order to understand the mechanism of binary combined displacement,the dynamic characteristics of sweep efficiency and displacement efficiency of heterogeneous reservoirs were studied through three dimensional physical simulation test,the contribution degree of the combined flooding to the enhancing oil recovery was also given quantitatively. Study results show that the latitude of enhancing oil recovery is the highest in medium permeability reservoirs,the low permeability reservoir is the next and high permeability reservoir is the lowest. The analysis on saturation field change shows that for the binary combined oil displacement,high permeability reservoir is to improve displacement efficiency,and low permeability reservoir is to improve sweep efficiency,and medium permeability reservoir is dominant on improving sweep efficiency and displacement efficiency. The contribution generated from oil displacement to enhance oil recovery is 40%,and contribution rate from sweep efficiency is 60%. It provides guidance for formula design of non-alkail binary combined flooding.

关 键 词：无碱二元驱 波及因数 驱油效率 物理模拟 贡献率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]