水淹层有效介质对称复电阻率模型求解方法

摘要

由于以往的水淹层导电机制和解释模型已不适合注聚后的油层,因此解释注聚后水淹层的剩余油饱和度,成为目前的难题之一,而复电阻率测井能在一定程度上克服常规电阻率测井受地层水矿化度影响的不足.基于水淹层有效介质对称复电阻率模型是利用牛顿法与二分法结合的方式求解模型,采用该算法求解方程是收敛的.研究表明,水淹层有效介质对称复电阻率模型可用于水淹层的定量解释,具有实用价值.%Because conductive mechanism and interpretation model for water flooded layer could not be used in polymer flooded reservoir, the interpretation of remaining oil saturation in water flooded layer after polymer injection become one of major difficulties. Complex resistivity logging could to some extent overcome the influence of salinity on conventional resistivity logging. Because Newton method and dichotomy are used in symmetric effective medium complex resistivity model, the equation is convergent. The study shows that the symmetric effective medium complex resistivity model of water flooded layer could be used for quantitative interpretation of water flooded layer.