稠油资源在世界石油工业中占有重要的地位，稠油开发技术的研究具有重要的应用价值和战略意义。大量的实验结果表明稠油-水两相的相对渗透率在热采、非热采等实际生产过程中是变化的，但目前没有这方面系统的实验和理论研究。因此，尚未有随生产条件变化的稠油-水相对渗透率函数可供油藏模拟和生产过程评价、预测和优化使用。本课题采用实验和多孔介质两相流动模拟相结合的方法，系统地研究稠油-水两相流动相对渗透率。结合稳态和非稳态两种实验方法，考察油相粘度、温度、溶剂浓度以及界面张力等因素对稠油-水两相渗透率的影响，揭示稠油油藏驱替过程中残余油饱和度、束缚水饱和度、油水相对渗透率与油相粘度、油水界面张力以及润湿性的变化规律；应用压力平衡-毛管束模型对实验结果进行模拟分析，建立稠油-水两相相对渗透率随上述参数变化的数学模型，为稠油油藏数值模拟提供坚实的理论基础。

Heavy oil resource plays an important role in the world petroleum industry, and the study on heavy oil development technology is of important applications and strategic significance. Numerous experimental results have shown that the oil-water relative permeability function changes in both thermal and non-thermal production processes. However, no systematic study, both theoretically and experimentally, of the phenomena has been reported. Therefore, there is a lack of a theory for predicting heavy oil-water relative permeability as a function of heavy oil phase viscosity in production assessment, forecasting, and optimization. This project will systematically study the heavy oil-water relative permeability functions by conducting both laboratory experiments and two-phase flow simulations. Both steady-state and unsteady-state methods will be used to investigate the effects of oil viscosity, temperature, solvent concentration and interfacial tension on heavy oil-water relative permeabilities. From the results of this study the variations of residual oil saturation, irreduciable water saturation, and relative permeabilities during the displacement in oil reservoirs as functions of oil phase viscosity, interfacial tension and wettability will be obtained. The pressure balanced capillary bundle model will be used to analyze and simulate the experimental results to derive mathematical models of heavy oil-water relative permeabilities. The results of this study will provide a solid theoretical basis for heavy oil reservoir simulations.