摘要
为了定性和定量研究稠油热水驱微观驱替效果,创建了驱替效果分析的新方法——"解—合"法。在油湿性微观模型中,分别在75和90℃条件下进行稠油热水驱替实验,对比分析2种条件下驱替平衡时,微观波及系数、驱油效率和采收率的变化特征及机理。结果表明,油湿性微观模型稠油热水驱时,通过乳化捕集和乳化携带作用大幅提高了微观驱替效果;90℃时稠油热水驱的微观波及系数、驱油效率和采收率均高于75℃时的。油湿性微观模型稠油热水驱时,在残余的少量棕色油膜中包含有油包水乳状液。在75℃时热水波及区域内残余油的分布以网状和块状为主,且数量较多,90℃时热水波及区域内的残余油分布主要呈连续性较差的孤岛状,且数量较少。
In order to study microscopic displacement effect of hot water flooding on heavy oil qualitatively and quantitatively,a new method for displacement effect analysis was established which is named as'Cutout-Flatten Image'method. In oilwet micro-models,hot water flooding of heavy oil was performed separately at 75 and 90 ℃. The variation characteristic and mechanism of micro sweep efficiency,displacement efficiency and recovery efficiency were analyzed comparatively. Experimental data show that micro displacement effect is improved greatly by emulsion entrapment and emulsion entrainment in the oil-wet models. Micro sweep efficiency,displacement efficiency and recovery efficiency of hot water flooding at 90 ℃for heavy oil are all higher than those at 75 ℃. Water-in-oil emulsion is in a few of residual brown oil films in the oil-wet micro-models. The residual oil in the swept area of hot water at 75 ℃ is large in quantity with a net-and block-shaped distribution;while that at 90 ℃ is small in quantity and it distributes in the shape of isolated island with poor continuity.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2016年第1期85-89,共5页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项"整装油田特高含水期提高水驱采收率技术"(2011ZX05011-002)
关键词
稠油
热水驱
油湿性
微观模型
定量分析
heavy oil
hot water flooding
oil wettability
micro-model
quantitative analysis
