温度对稠油/热水相对渗透率的影响

针对热采稠油油藏不同温度带的油水相对渗透率研究较少、油水运动规律认识不清的问题，开展了不同温度（100~280℃）条件下的稠油/热水相对渗透率实验研究。探究了温度对稠油/热水相对渗透率曲线端点饱和度及其对应的单相渗透率的影响规律，并从微观角度对变化规律进行了机理分析。实验结果表明，随着温度升高，束缚水饱和度先增大后减小，束缚水条件下的油相渗透率逐渐降低；残余油饱和度降低，其对应的水相渗透率逐渐增大。不同温度的残余油条件下的水相渗透率均较低。各温度条件下稠油/热水相对渗透率的变化规律，深化了对热采油藏流体渗流特征的认识，指导下一步开发方案调整。

Impact of Temperature on Relative Permeability of Heavy Oil/Hot Water

There is limited research on the oil-water relative permeability of thermally recovered heavy crude oil reservoirs, and the oil-water movement rules have not been clarified. Thus, this experimental study focuses on the relative permeability of heavy oil/hot water at different temperatures (100~280℃); explores the rules concerning the impact of end-point saturation of the relative permeability curve and the corresponding single-phase permeability of heavy oil/hot water; and analyses the mechanism of the variation law from a microscopic perspective. Experimental results suggest that the bound water saturation increased initially and then decreased as the temperature rose; the oil-phase permeability gradually declined under the bound water condition; and the residual oil saturation was observed to decrease, whereas the corresponding water-phase relative permeability gradually increased. The water-phase permeability was lower under the residual oil condition with different temperatures. Studies on the variation laws of relative permeability of heavy oil/hot water at various temperatures will deepen the understanding of fluid flow characteristics of thermal recovery reservoirs.