Discussion on calculation and physical meaning of Tong′s "7.5" value
FENG Qiao;WANG Baili;MENG Haiyan;CAO Chongjun;SUN Qiufen;ZHAO Qiyang;Hangzhou Research Institute of Geology,PetroChina;
For different water-flooding characteristic curves, there are different oil-water relative permeability laws. In this paper, the formulae of "7.5" under two water-flooding characteristic curves are studied. The research shows that different relationship formulae between the relative permeability of oil and water and the water saturation results in different values of the "7.5". But there is a common place, that is, this value is related to the regression coefficient of oil-water relative permeability curve and the natures of reservoir and fluid. Verified by applications, the oil-water infiltration law of the B-type water-flooding characteristic curve is recommended to be used to calculate the "7.5" value.
【CateGory Index】： TE357.6