毛管压力曲线平均化及J函数处理

实验测试结果表明,压汞法测得的毛管压力曲线,其形状特征主要取决于岩石的润湿性和岩石的孔隙结构特征。具有不同渗透率和孔隙度的岩心,测得毛管压力曲线是不相同的。因此,对于某一具体的油藏,如何得到一个具有代表性的毛管压力曲线,就显得十分重要。而J函数就是通过无因次化处理消除了渗透率和孔隙度的影响。提出了毛管压力曲线平均化原理以及处理J函数的方法,并编制程序对实际油田毛管压力实验数据进行处理,得到了较好的结果。

Averaging capillary pressure curve and processing J function

Test result indicates that the shape of capillary pressure curve measured by mercury intrusion method mainly depends on rock wettability and pore structure.Measured capillary pressure curves are different for cores with different permeability and porosity.Therefore,how to get a representative capillary pressure curve becomes very important for a specific reservoir.J function can eliminate the impact of permeability and porosity by dimensionless treatment.This paper presents the principle of averaging capillary pressure curve and the method of processing J functions,and makes program for processing capillary pressure data.