通过对元城油田储层岩心进行水敏实验,找到引起储层损害临界矿化度,并计算由水敏引起的储层损害程度,从而为合理的注入水开发提供科学依据。实验表明:水敏是元50-10-77、元50-10-89、元50-10-61、元56-70岩石伤害的潜在因素。在注水开发中,注入水的矿化度应不低于90000mg/L,或者在注入水中加入高效粘土稳定剂防止造成伤害。 Water sensitivity test of reservoir core in Yuancheng Oilfield can be used to find out the critical salinity caused by reservoir damage and to calculate the extent of reservoir damage caused by water sensitivity so as to provide a scientific basis for the rational development of injected water. Experiments show that: Water sensitivity is a potential factor of 50-77, 50-50-89, 50-50-61, 56-70 rock injuries. In waterflooding, the salinity of the injected water should not be less than 90000mg / L, or highly effective clay stabilizers should be added to the injected water to prevent injury.