It is crucial to obtain the representative relative permeability curves for related numerical simulation and oilfield development. The influence of temperature on the relative permeability curve remains unclear. An unsteady method was adopted to investigate the influence of temperature (range from 25–130 °C) on the oil–water relative permeability curve of sandstone reservoirs in different blocks. Then, the experimental data was analyzed by using an improved Johnson–Bossler–Naumann method. Results reveal that with the increase in temperature within a certain temperature range: (1) the relative permeability of the oil and water phases increases; (2) the irreducible water saturation increases linearly, whereas the residual oil saturation decreases nonlinearly, and the oil recovery factor increases; and (3) the saturation of two equal permeability points moves to the right, and hydrophilicity becomes stronger. The findings will aid future numerical simulation studies, thus leading to the improvement of oil displacement efficiency.

获得具有代表性的相对渗透率曲线对于相关数值模拟和油田开发至关重要。温度对相对渗透率曲线的影响尚不清楚。采用非稳态方法研究了温度（25～130℃）对不同区块砂岩储层油水相对渗透率曲线的影响。然后，使用改进的 Johnson-Bossler-Naumann 方法分析实验数据。结果表明，在一定温度范围内，随着温度的升高：（1）油相和水相的相对渗透率增加；(2)束缚水饱和度线性增加，残余油饱和度非线性降低，采收率增加；(3)两个等渗点的饱和度向右移动，亲水性变强。这些发现将有助于未来的数值模拟研究，从而提高驱油效率。