温度对稠油/热水相对渗透率的影响

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

孙宝泉

SUNBaoquan

中国石化胜利油田分公司勘探开发研究院, 山东 东营 257015 中国石油大学(华东)地球科学与技术学院, 山东 青岛 266580

Exploration and Development Research Institute of Shengli Oilfield, SINOPEC, Dongying, Shandong 257015, China School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China

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。

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.

10.11885/j.issn.1674-5086.2015.08.04.02