为了全面评价温度、有效应力和含水饱和度的变化对砂岩渗透率的影响,实验测定了在不同条件下低渗透砂岩渗透率的变化规律。根据实验结果定性地分析了温度、有效应力和含水饱和度对低渗透砂岩渗透率的影响以及三者之间的相互作用关系。实验结果表明:在有效应力相对较小时温度对渗透率的影响较大,而随着有效应力的增大其作用逐渐减小;随着含水饱和度的增加,温度对渗透率的影响增大;渗透率与有效应力近似呈指数关系变化,但随着温度和含水饱和度的增加需要作校正处理;含水饱和度越高岩石渗透率越低,且随着有效应力的增加,渗透率下降幅度呈递增的趋势,而温度的增加使得含水饱和度越高的砂岩渗透率下降越严重。

In order to generally evaluate the effect of temperature, effective stress and w ater-saturate to the permeability of tight sandstone, it measured the permeabil ity of tight sandstone at various conditions. It qualitatively analyzed the effe ct of temperature, effective stress and water-saturate to the permeability of t ight sandstone and relationship of them. The experimental result shows that temp erature has greater effect on permeability at lower effective stress level but d ecreases with the increasing of effective stress. Higher of water saturation of  sandstone, greater effect of temperature on permeability. The relationship betwe en permeability and effective stress is approximatively exponent but is necessar y to correct at high temperature and water-saturate level. Water-saturate is o ne of key factors that have great effect on permeability and the permeability gr eatly decreases when effective stress increased. 