High-Performance Polymeric Surfactant of Sodium Lignosulfonate-Polyethylene Glycol 4000 (SLS-PEG) for Enhanced Oil Recovery (EOR) Process

Slamet Priyanto,Suherman Suherman,Rima Chairani Yuniar,Teodora M F B Dasilva,Ronny Windu Sudrajat,Hanifa Aviana,Bambang Pramudono,Teguh Riyanto

doi:10.3311/ppch.17972

Abstract

Recently, the increase in fuel oil demand was not supported by petroleum production due to the low productivity of old wells. Furthermore, an appropriate technology, such as Enhanced Oil Recovery (EOR) technology, is needed to maximize the productivity of the old well. Therefore, the purpose of this study was to synthesize a polymeric surfactant for the EOR process from sodium lignosulfonate (SLS) and polyethylene glycol (PEG) in various SLS to PEG ratios, namely 1:1 (PS1), 1:0.8 (PS2), and 1:0.5 (PS3). The surfactants were characterized using several methods, such as Fourier Transform-Infrared spectroscopy (FT-IR), compatibility, stability, viscosity, and phase behavior tests. The performance of the surfactants for the EOR process in different brine solution concentrations (16,000 ppm and 20,000 ppm) was also studied. The result showed that the introduction of the PEG molecule to the surfactant had been successfully conducted as FT-IR analysis confirmed. The surfactant's hydrophilicity increased with the introduction of PEG due to the increase of the ether group. A Winsor Type I or lower phase microemulsion was formed due to the high hydrophilicity. The highest oil yield (79 %) was obtained by PS1 surfactant, which has the highest PEG dosage, in a brine solution of 1,600 ppm. Therefore, it was concluded that the introduction of PEG could increase the hydrophilicity, viscosity, and EOR performance.

Highlights

In this decade, the world industry, especially in Indonesia, has been increasing; the energy demand will increase
The purpose of this study was to synthesize a polymeric surfactant for the Enhanced Oil Recovery (EOR) process from sodium lignosulfonate (SLS) and polyethylene glycol (PEG) in various SLS to PEG ratios, namely 1:1 (PS1), 1:0.8 (PS2), and 1:0.5 (PS3)
The result showed that the introduction of the PEG molecule to the surfactant had been successfully conducted as Fourier Transform-Infrared spectroscopy (FT-IR) analysis confirmed

Summary

Introduction

The world industry, especially in Indonesia, has been increasing; the energy demand will increase. The main energy source for Indonesia and the world comes from petroleum so that petroleum reserves are decreasing. The Enhanced Oil Recovery (EOR) method is one of the methods that can be used. EOR is a technique to increase oil recovery from fields that are already producing using primary production methods. One of the low-cost and most developed EOR methods is chemical injection or CEOR process [1]. The chemical can be adsorbed by the surface of the rock during the surfactant flooding process [3]. It is important to develop a surfactant that has a low tendency to be adsorbed by the surface of the rock

Objectives

Methods

Results