中文摘要：

低渗透砂岩储层在开采过程中,随着有效应力的升高将会发生渗透率应力敏感,导致渗透率的下降。在考虑储层原地应力的情况下,对塔里木油层岩心进行了实验研究。结果表明：该区块的应力敏感性很强,变化规律符合指数关系式,在同一区块,渗透率相对较高的岩心随着覆压的变化渗透率恢复程度反而越低。通过对4个不同区块具有代表性的4块岩心进行饱和水后测定渗透率的变化实验表明：饱和水后渗透率急剧降低,渗透率相对较高的岩心渗透率下降得越明显。

英文摘要：

In the production of low-permeability sandstone reservoir,as effective stress rises gradually,the stress sensitivity will be appear,which causes permeability to decline.In considering in-situ stress of reservoir,cores,taken from Tarim Oilfield,were studied.The results showed that the stress sensitivity of the block was very strong,and its variation is consistent with exponential relationship.In the same block,permeability restoration of the cores with higher permeability was lower when the confined pressure changed.In addition,the experiments of the four cores from four different blocks,which were saturated with water,showed that after saturation,the permeability of the cores declined rapidly and that of the ones with higher permeability declined obviously.