In Oman there are still large remaining oil reserves that require implementation of Enhanced Oil Recovery processes such as CO2 injection, for light oil. CO2-Oil Minimum Miscibility Pressure (MMP) is the key parameter for the design and operations of successful CO2 flood. This study is based on developing a method of calculating the MMP for Omani oil reservoirs. Part-1 of the studyis the experimental work based on the Rising Bubble Apparatus (RBA) measurement of MMP and part-2 is the examination of the existing models for MMP predictions and the adjustment of parameters for obtaining the most accurate predictions by the equation of state fluid PVT modeling simulator PVTPro5.2.1software. The RBA system set-up was successfully developed for the first time at Sultan Qaboos University. CO2 MMP measurements were carried out for three different oil samples using the RBA. For the RBA experiments, the PVTPro5.2.1 simulator was used to adjust the best setting parameters for CO2 MMP predictions. Very good agreement between the experimental MMP and the software predictions were achieved within the range of 2.27% error maximum. Moreover, some existing well-known models have been examined for CO2–Oil MMP predictions with the observed errors of up to 43.55%.

In Oman there are still large remaining oil reserves that require implementation of Enhanced Oil Recovery processes such as CO2 injection, for light oil. CO2-Oil Minimum Miscibility Pressure (MMP) is the key parameter for the design and operations of successful CO2 flood. This study is based on...