Study of Minimum Miscibility Pressure of Malaysian Light Oil Samples Using Different Type of Gases

Miscible gas injection recently becomes an imperative method of enhanced oil recovery approach for increasing oil recovery. Successful design and implementation of a miscible gas injection project depends upon the minimum miscibility pressure. The preliminary screening parameters of gas injection including the minimum miscibility pressure (MMP) and type of gas used. Different type of gas injected will give different recovery results due to the unique compositions of oil. The Vanishing Interfacial Tension (VIT) experimental method is used in determines the miscibility efficiency on each type of gas. Basically, in this study carbon dioxide and nitrogen gas has been used in determine MMP for both Angsi and Dulang crude oil. Along the way of this study, factors in determine the MMP can be identified based on the results obtained.
This study has found that carbon dioxide give a better result than nitrogen as injection gas for both light oil samples by providing lower value of MMP. Reservoir temperature, oil composition and type of gases are three main factors that affect in determine the MMP of light oil. The effects of these factors on MMP were discussed in this paper