Application of Sodium Lignosulfonate Surfactant Synthesized From Bagasse as an Alternative Surfactant Flooding for Light Oil Reservoir by Considering Carbon Number

Abstract

The purpose of this research is to demonstrate that bagasse as a waste can be used for ehanced oil recovery by knowing the components contained in it. Components that must be considered in order to occur interaction between surfactant and oil is Carbon element.
This is a laboratory research method by using sodium lignosulfonate (SLS) surfactant of bagasse injection process. Surfactant SLS bagasse is tested with light crude oil, intermediate crude oil and heavy crude oil. The expected emulsion is the middle emulsion (microemulsion) between surfactant and crude oil. Based on the result of characteristic test, the injection of surfactant SLS bagasse in various salinity water formation was done. Component test was also conducted on the SLS surfactant and crude oil samples.
From the results of laboratory observations, it turns out SLS surfactant bagasse to form emulsion on light oil. While on medium oil and heavy oil is not formed emulsion. The test results of phase behavior surfactants SLS bagasse with light oil, seen emulsions formed are middle-phase emulsion. Based on the results obtained then evaluated the components of light oil and surfactant components by conducting component test using NMR test.
Based on the structure of the lignosulfonic monomer obtained from the NMR spectrum analysis, the number of atoms C = 11, O = 8, H = 16, and S = 1, so the empirical formula of lignosulfonate monomer is (C11H16O8S)n, with a relative molecular mass of 308.06. The SLS surfactant that has been successfully synthesized has a HLB value of 11.62, and accordance with its use as an oil in water emulsion type system. The result of light crude oil component analysis shows that the EACN (Equivalent Alkaline Carbon Number) value of sample crude oil from field X is 8.29 with water salinity of field X formation is 8,110 ppm. The core flood results also showed the best results on surfactant composition with salinity of 10,000 ppm.
Based on the results of this laboratory research and the above discussion, the following are the conclusions: Recovery oil from the result of surfactant flooding is influenced by some surfactant conditions that are salinity and carbon number of surfactant SLS and sample crude oil. The natural characteristics of surfactant SLS bagasse have Carbon number 11 so that the best result for core flood is for light crude oil that approaches the SLS carbon number surfactant at the same salinity.