基于时移生产动态测井资料的剩余油饱和度计算方法及其应用

Calculation method of remaining oil saturation based on time-lapse production dynamic logging data and its application

生产动态测井资料的应用,往往局限在直观的判断性应用,在深度挖掘生产动态测井数据的应用方面较少。以油、水两相渗流理论和物质平衡方程为基础,提出了利用时移生产动态测井资料计算剩余油饱和度的新方法;根据产水率与含水饱和度的分布范围和特征,利用不完全Beta函数进行曲线拟合,通过迭代算法找到全局最优解,得到了产水率与含水饱和度的定量转换关系式。在此基础上进一步建立了产水率与驱油效率之间的定量关系,实现了本文方法在不同储层类型水淹级别划分中的应用。实例应用结果表明,水淹级别解释符合率达到90%。本文方法可推广应用于多种储层的水淹级别判别中。

Production dynamic logging data are often limited to intuitive judgment applications,but rarely used in deep research of production dynamic logging data.Based on the oil and water two-phase filtration theory and the material balance equation,a new method to calculate remaining oil saturation using time-lapse production dynamic logging data is proposed.According to the distribution range and characteristics of water production rate and water saturation,the quantitative conversion relationship between water production rate and water saturation is obtained by using incomplete Beta function for curve fitting and finding the global optimal solution through iterative algorithm.On this basis,the quantitative relationship between water production rate and oil displacement efficiency is further established,which is applied in dividing water flooded levels of different reservoirs.Application results show that the coincidence rate of water flooded level interpretation reaches 90%,proving that this method can be widely applied to the discrimination of water flooded level in various reservoirs.