乳化降黏剂改善稠油油藏开发效果可视化实验

发布时间：2018-03-05 12:24

本文选题：稠油油藏　切入点：乳化降黏剂　出处：《西安石油大学学报(自然科学版)》2017年03期 　论文类型：期刊论文

【摘要】：利用静态实验法评价了不同浓度下乳化降黏剂的洗油效率,确定了降黏剂的最佳浓度范围;通过二维平板可视化装置对比了单纯蒸汽驱与降黏剂辅助蒸汽驱的开发效果,从微观角度解释了降黏剂辅助蒸汽驱提高采收率机理。静态实验结果表明,随着降黏剂质量分数的增加,静态洗油效率逐渐增加,降黏剂质量分数为0.5%时,静态洗油效率为34.1%,比单纯热水洗油效率增加了27.1%。二维平板可视化实验结果表明,降黏剂辅助蒸汽驱阶段采收率为14.2%,比单纯蒸汽驱增加了9.2%,含水率降低了5.5%;微观可视化实验结果表明,加入降黏剂后,驱替通道内形成了水包油乳状液,提高了原油的流动性,增大了洗油效率,同时乳化过程中形成较大的水包油乳状液在一定程度上可以对大孔道进行封堵,使得驱替液转向,扩大了波及体积。
[Abstract]:The oil washing efficiency of emulsified viscosity reducer at different concentrations was evaluated by static experiment method, and the optimum concentration range of viscosity reducer was determined, and the development effect of pure steam drive and viscosity reducer auxiliary steam drive was compared by two-dimensional flat panel visualization device. The mechanism of enhanced oil recovery by viscosity reducer assisted steam flooding is explained from the microscopic point of view. The static experimental results show that with the increase of viscosity reducer mass fraction, the static oil washing efficiency increases gradually, and the viscosity reducing agent mass fraction is 0.5%. The static washing efficiency of oil is 34.1, which is 27.1% higher than that of pure hot water. The recovery factor of viscosity reducer assisted steam drive stage is 14.2g, which increases 9.2% and reduces water cut 5.5. the microscopic visualization experiment results show that, after adding viscosity reducer, the oil-in-water emulsion is formed in the displacement channel, which improves the flow of crude oil. The oil washing efficiency is increased, and a large oil-in-water emulsion can be formed in the emulsification process, which can block the large pore channel to some extent, which makes the displacement fluid turn and the sweep volume enlarged.
【作者单位】：中国石油大学(北京)油气资源与探测国家重点实验室;大庆油田采油工程研究院;
【基金】：国家自然科学基金“裂缝型稠油油藏非等温渗吸机理及动力学模型”(编号:51274212) 国家科技重大专项“海上稠油油田热采实施优化及应用研究”(编号:2016ZX05058-001-008)
【分类号】：TE39

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