A Simplified Model for Predicting Minimum Miscibility Pressure of CO2 Flooding in Reservoirs of the Ordos Basin

Minimum miscibility pressure (MMP) is a critical parameter in reservoir screening and development design for CO2 flooding projects. With the expanding implementation of CO2 flooding in the Ordos Basin, practical challenges have emerged, including difficulties in acquiring crude oil samples and the high testing cost during the screening phase. Through experimental measurements and theoretical analysis, significant compositional similarities among different crude oils were revealed. Based on this finding, a simplified MMP prediction model was developed , requiring only reservoir temperature as input. Among the evaluated models, the quadratic polynomial expression achieved the highest fitting accuracy (R2=0.841) and the smallest root mean square error (RMSE).