Abstract: In order to study the effect of temperature on the heavy oil and water relative permeability during the thermal recovery process of heavy oil in Well J7, Changji oilfield, and provide basic data for establishing a reasonable development plan and predicting the oil and water distribution, heavy oil/water relative permeability experiments on the cores with permeability of 56.38mD, 126.54mD and 224.98mD, respectively, were carried out at 50-200℃. The experimental results show that:(1) at 50-200℃, the irreducible water saturation increases with increasing temperature, and the residual oil saturation decreases with increasing temperature; (2) at the same water saturation, the oil relative permeability increases more obviously with increasing temperature; however, with the increase of water saturation, the relative increase of the oil relative permeability decreases gradually; (3) when the permeability is 50-200 mD, the change of the core permeability doesn't influence the relationships between temperature and water saturation, residual oil saturation, and oil/water relative permeability.

Key words: relative permeability, Changji oilfield, heavy oil, experiment, thermal recovery