Studi Injeksi Surfaktan Sodium Lignosulfonat (SLS) pada Media Sandstone dan Limestone Dalam Rangka Enhanced Oil Recovery (EOR)

Ariff Trisetia Anggara, Muhammad Mufti Azis, Suryo Purwono


Enhanced Oil Recovery (EOR) has been considered as  a promising technology to boost the national oil production through revitalization of existing wells in Indonesia. Chemical EOR with surfactant is known to reduce the Interfacial Tension (IFT)values of oil and water which can increase oil mobility in rocks. This study aimed to core flooding test on a laboratorium scale with low cost EOR surfactant from Sodium Lignosulfonate (SLS) over two types of porous media, namely sandstone and limestone. Here, SLS was produced from lignin which was extracted from black liquor waste of pulp mill plant. In this study we used light oil with an oil viscosity of 0.77 cp and Gravity API of 43.9o. In order to determine the effectiveness of surfactant performance prior to core flooding, several tests such as aqueos stability test, an IFT test, CMC (Critical Micelle Concentration) test, and a filtration test have been conducted. For core flooding test, surfactant concentration of 1% was injected continuously into each native core at temperature of 60oC. In addition, the sequence of core flooding was water flooding I, surfactant flooding and water flooding II. Here, we would like to evaluate the incremental oil yield after surfactant flooding and water flooding II. The result of core flooding showed that sandstone media provided incremental oil as much as 17.5% with 10.9  pore volume (PV). On the other hand, the core flooding with limestone only gave an additional oil yield as much as 4.7% with 11 PV injected. Hence, the result showed that SLS surfactant showed a promising result for sandstone media.


EOR, sodium lignosulfonate, coreflooding, sandstone, limestone


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