Estimation of gas–oil surface tension

A method for estimating gas–oil surface tension has been presented in this study. This method consists of two empirical equations. The first equation relates dead oil surface tension with API gravity and temperature, while the second relates the ratio of live to dead oil surface tension with solution gas–oil ratio. The proposed method shows excellent results compared to the experimental data, and clearly outperforms the empirical work of Baker and Swerdloff.