石油地质与工程2026，Vol.40Issue(2)：70-76,7.DOI:10.26976/j.cnki.sydz.202602010
稠油油藏冷采降黏复合驱油体系研究及应用
Study on a cold-production viscosity-reducing composite oil displacement system for heavy oil reservoirs and its application:a case study of Block W in Henan Oilfield
赵一潞 1薛洋洋 1郭宜林 2李飞鹏 1赵楠 1孟淑雅1
作者信息
- 1. 中国石化河南油田分公司石油工程技术研究院,河南 南阳 473132
- 2. 中国石化河南油田分公司采油二厂,河南 南阳 473132
- 折叠
摘要
Abstract
To address the low waterflooding efficiency in heavy oil reservoirs of Henan Oilfield,which arises from high crude oil viscosity and a large water-oil mobility ratio,macro-and micro-scale oil displacement experiments were conducted combined with the characteristics of heavy oil reservoirs in Block W,focusing on the development of a cold-production viscosity-reducing composite oil displacement system.The results indicate that compounding an emulsifying viscosity reducer with a polymer yields a new cold-production viscosity-reducing composite oil displacement system(0.3%H1 viscosity reducer+0.1%ZL polymer)capable of"regulating the viscosity of both oil and water phases".Under the conditions of an oil-water ratio of 5:5 and 50℃,this composite system significantly reduces the oil-water viscosity ratio to 2.02,achieving an emulsifying viscosity reduction rate of up to 97.77%for heavy oil.Additionally,the mechanism by which the composite system microscopically activates residual oil and its oil recovery enhancement effect have been clarified:through the synergistic action of its inherent viscoelasticity and emulsifying viscosity-reducing properties,it effectively mobilizes residual oil in blind-end,thin-film,and adsorbed forms.Compared with water flooding,it increases oil recovery by 40.35%and reduces water cut by 59.5%.Field tests in Well Group 3 of Block W have all demonstrated favorable water cut reduction and oil increment effects,further confirming the broad application prospects of this composite oil displacement system.关键词
稠油油藏/流度调控/乳化降黏/提高采收率/协同增效Key words
heavy oil reservoirs/mobility control/emulsification viscosity reduction/enhanced oil recovery/synergism分类
能源科技引用本文复制引用
赵一潞,薛洋洋,郭宜林,李飞鹏,赵楠,孟淑雅..稠油油藏冷采降黏复合驱油体系研究及应用[J].石油地质与工程,2026,40(2):70-76,7.
