黏度比对稠油-水相对渗透率曲线的影响

发布时间：2018-01-07 17:22

本文关键词：黏度比对稠油-水相对渗透率曲线的影响　出处：《科学技术与工程》2017年33期 　论文类型：期刊论文

【摘要】：相对渗透率是描述多孔介质中多相流的基本参数,也是评价油藏特征、制订开发方案等的重要依据,通常可由室内实验获得。针对胜利油田某区块稠油,本文采用稳态法测定了油水黏度比相同和不同时的稠油-水相对渗透率曲线,并利用核磁共振技术替代传统称重法测定不同时刻的岩心含水饱和度,结果表明:黏度比对稠油-水相渗曲线具有显著影响。当油水黏度比一定时,相渗曲线不随实验条件的改变而变化;随油水黏度比的增大,油相、水相的相对渗透率均大幅降低,两相渗流区变小,等渗点的含水饱和度降低但幅度较小,束缚水饱和度和残余油饱和度增大,其中,油水黏度比为1861的残余油饱和度比40的高出达10.59%,而采收率则低了近20%,说明油水黏度比对残余油饱和度也有很大影响,且残余油饱和度与油相黏度的对数值呈线性关系。
[Abstract]:Relative permeability is the basic parameter to describe the multiphase flow in porous media, and it is also an important basis for evaluating reservoir characteristics and formulating development plans, which can usually be obtained by laboratory experiments, aiming at heavy oil in a certain block of Shengli Oilfield. In this paper, the steady state method is used to measure the relative permeability curves of heavy oil and water with the same and different viscosity ratio of oil and water, and the water saturation of cores at different times is measured by nuclear magnetic resonance instead of traditional weighing method. The results show that the viscosity ratio has a significant effect on the heavy oil-water phase permeability curve, and when the oil-water viscosity ratio is fixed, the phase permeability curve does not change with the change of experimental conditions. With the increase of oil / water viscosity ratio, the relative permeability of oil phase and water phase decreases significantly, the seepage zone of two phases becomes smaller, the water saturation of isoosmotic point decreases but the amplitude is small, and the irreducible water saturation and residual oil saturation increase. The residual oil saturation with oil / water viscosity ratio of 1861 is 10.59 higher than that of 40, while the recovery factor is lower by nearly 20, which indicates that the oil / water viscosity ratio also has a great effect on residual oil saturation. The logarithmic relationship between residual oil saturation and oil viscosity is linear.
【作者单位】：中国石油大学(华东)石油工程学院;
【基金】：国家自然科学基金(51274226,2013-2016) 山东省自然科学基金联合专项(ZR2014EL017)资助
【分类号】：TE312
【正文快照】： 山东省自然科学基金联合专项(ZR2014EL017)资助透率曲线的影响[J].科学技术与工程,2017,17(33):86—90Wang Shoulong,Li Aifen,Peng Ruigang,et al.Effect of oil water vis-cosity ratio on heavy oil-water relative permeability curve[J].ScienceTechnology and Engineeri

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