Influence of middle phase emulsion and surfactant concentration to oil recovery using SLS surfactant synthesized from bagasse

Abstract

The purpose of this study was to determine the effect of surfactant concentration and middle-phase emulsion on oil recovery in EOR process. In this research, the phase-behavioral test with observation of SLS surfactant of bagasse of three kinds of crude oil is light oil (42°API), intermediate oil (25°API) and heavy oil (18°API). From the results of these observations, it turns out SLS surfactant bagasse to form emulsion on light oil. The surfactant composition of SLS bagasse which mostly forming the middle phase emulsion (microemulsion) which is 10% is in the proportion of 10.000 ppm -1.5% composition while the surfactant composition of SLS is the smallest emulsion the middle phase (0%) is in the proportion of the composition of 20,000 ppm 4.5% and 40,000 ppm 4%. The highest injection result occurred in the surfactant composition of 1.5% with salinity 80.000 ppm which resulted in addition of recovery factor of 10.71%. While the lowest SLS surfactant injection occurred at a surfactant composition of 4.5% at salinity 20,000 ppm which only gained 1.05% recovery factor. Thus, it can be concluded that the recovery factor in the EOR process is determined by the formation of a sufficient middle phases emulsion at a small concentration of SLS surfactant.