用生产测井资料求储层剩余油饱和度的新方法

A New Method to Determine Residual Oil Saturation in Reservoir from Production Well-logging Data

针对生产实际中没有油水相对渗透率曲线而无法用生产测井资料求储层剩余油饱和度的问题 ,提出一种求储层剩余油饱和度的新方法。根据达西定律推导出储层产水率与油水相对渗透率的关系式 ,并利用油水相对渗透率与含水饱和度的经验关系 ,建立了储层产水率与含水饱和度的关系式 ,同时 ,讨论了岩石参数和流体特性对产水率的影响。通过综合运用裸眼井中常规测井资料和套管井中生产测井资料 (产出剖面测井资料和碳氧比能谱测井资料 ) ,研究确定区块每一储层产水率与含水饱和度之间关系式。根据不同储层的经验关系式及产出剖面测井资料可求出对应产层的含油饱和度值 ,从而为油田进一步开发调整提供依据。

Since there is no water and oil relative permeability data,the residual oil saturation(ROS) cann't be determined by production well logging method. This paper develops a new method to determine reservoir ROS by production well logging data. The relationship between water cut and relative permeability of oil and water is given based on Darcy law, and according to the empirical relationship between the relative permeability and water saturation,we can establish the relation between water cut and water saturation. We also discussed the effect of rock parameters and liquid characters on water cut.The relationship between water cut and water saturation in the formation of reservoir are given combined the conventional well logging data in open hole with production well logging data. On the basis of the empirical relationship,oil saturation is calculated from production profile.It gives a rational suggestion for extensive adjusting and developing of oil fields.