PRELIMINARY STUDY OF THE BEST VARIABLES USING SURFACTANT SLS IN EOR APPLICATION WITH CRUDE OIL LEDOK Edi Untoro1* and Slamet Priyanto2
1Ministry of Energy and Mineral Resources Education and Training Agency (ESDM) Akamigas
Cepu Mineral Energy Polytec hnic (PEM), Cepu, Central Java, Indonesia
2Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Semarang, Central Java, 50275, Indonesia.
Abstract
The demand for fuel oil in various industries, households, vehicles is increasing. This has resulted in decreased petroleum production in line with the decline in oil reserves in Indonesia. Therefore, Enhanced Oil Recovery (EOR) technology is needed to maximize old wells with large oil reserves, for example in the Ledok oil well, Cepu, Central Java, Indonesia. The purpose of this study was to study the best variables in the manufacture of surfactants from pulp-paper industrial waste in the form of black liquor. From the oil wells in Ledok-Cepu, crude oil and natural formation water were carried out. After that the SLS surfactant obtained was carried out by a qualitative FTIR test and its potential on the core flooding EOR, the results showed that the surfactants tested for compatibility with natural formation water met the requirements as surfactants for EOR. In qualitative analysis, FTIR shows the presence of sulfonate groups and ether groups in the surfactant, that the sulfonation reaction has gone well as a surfactant for EOR. After that, the core flooding test was carried out by injecting oil, brine, and surfactants, the best yield was with a formation water concentration of 5,000 ppm with a yield of 79 percent, and IFT reached 10^-1 dyne cm.
