基于J函数的含油饱和度建模方法—以陆丰A油田为例 Modeling Method of Oil Saturation Based on J Function—Taking Lufeng A as an Example

随着注水开发的进行，油层各项参数随之发生变化。由于水淹的影响，测井解释的含油饱和度与油藏原始含油饱和度在数值和分布上都有显著差异，不能代表油藏的原始分布状态。依据平均化后的毛管压力曲线，分流动单元对各类型储层进行原始含油饱和度的计算，建立基于J函数的含油饱和度模型，减小不同钻井时期测井解释含油饱和度的误差，对储量复算、油藏数值模拟等工作具有重要意义。 With the development of water injection, the parameters of the reservoir change accordingly. Because of the influence of flooding, there is a significant difference between the oil saturation of logging interpretation and the original oil saturation of reservoir, and it cannot represent the original distribution of oil reservoir. According to the average capillary pressure curve, the original oil saturation of each type of reservoir is calculated by flow unit, and a model of oil saturation based on J function is established. The error of oil saturation in logging interpretation at different drilling periods is reduced. Therefore, this work is important for reserves recalculation and reservoir numerical simulation.