【摘要】 油田进入三次采油期,储层注入聚合物溶液,储层的物性、电性会发生相应的变化。为了查明储层注入聚合物溶液发生的变化,模拟油田实际注聚三次采油开发过程设计岩心实验,通过注聚合物岩心的基础实验,获得了岩心驱替后阿尔奇公式中的胶结指数m增大、饱和度指数集中在1.4～1.7之间,电阻率变化呈“S”和斜躺“L”型减小的变化规律。在聚合物驱油过程中,岩心的电阻率变化规律与盐水驱油过程相类似,在测井评价中,可直接使用水驱油田的饱和度的评价方法。更多还原

【Abstract】 When oilfield comes into tertiary oil recovery phase, physical and electric properties of pay zones will uncertainly altere to a great extent due to the injection of polymers. In order to find the change of reservoir properties having been injected by the polymers,the core experiments have been designed according to the reservoir behaviors in the period of tertiary oil recovery. The core experiments in polymer injection region proved that bonding index (m) increases while the saturation index (n) of Archie’s equation focuses on 1.4~1.7 and resistivity changes in the shape of S and L. After polymer is displaced, reservoir porosity and permeability can be calculated by conventional logging method. During polymer flooding, the law of resistivity change is similar to salinity water displacing oil. So the method of saturation appraisal in water flood field can be directly used in logging assessment.更多还原