Abstract:          Tight oil reservoirs are buried deeply, its permeability is low, and it is easily influenced by sensitivity. So, it is important to study the sensitivity of tight oil reservoir to prevent reservoir damage and improve oilfield efficient development. However, due to the difficulty of water injection in tight reservoirs, the flow velocity is slow and takes longer time. In this paper, an evaluation method of reservoir sensitivity flow experiment was adopted, and sensitivity experiment on some rock samples of four wells in Xinjiang Jimsar basin Formation tight oil was conducted. The results show that the average damage of water sensitivity is 43.64%, velocity sensitive damage is 24.3%, salt sensitivity damage is 33.80%, acid sensitivity damage is 15.66%,and the critical velocity is 24.63 m/d. This tight oil reservoir has medium water sensitivity and salt sensitivity while weak acid sensitivity and velocity sensitivity. Base on the research above we have a certain understanding of this reservoir's sensitivity, which provides a theoretical basis for rational exploitation of the oilfield and reduces the damage of tight reservoir.

Key words: Tightoilreservoir, Sensitivityevaluate, Watersensitivity, Velocitysensitivity, Saltsensitivity, Acidsensitivit

摘要：         致密性储层埋藏深、渗透率特别低,受敏感性影响较大,研究致密性储层的敏感性对避免不合理的开采方式对储层造成伤害,从而有利于油田高效开发。但由于致密储层注水困难,实验过程中,流速慢、耗时较长。本文采用储层敏感性流动实验评价方法,通过对新疆吉木萨尔致密储层4口油井的若干岩样进行敏感性实验,并对实验结果进行了分析、评价。结果表明,该致密性储层岩样水敏损害程度平均为43.64%,速敏损害程度平均为24.3%,盐敏损害程度平均为33.80%,酸敏损害程度平均为15.66%,临界流速为24.63m/d;该致密性储层具有中等偏弱水敏性、弱速敏性、中等偏弱盐敏性、弱酸敏性。研究结果为该区块油田采取合理的开采方式,降低敏感性对储层的伤害提供理论依据。

关键词: 致密油储层, 敏感性评价, 水敏性, 速敏性, 盐敏性, 酸敏性