ADDITION OF SURFACTANTS TO LOW SALINITY WATERFLOODING IN MICROFLUIDICS SYSTEM TO INCREASE OIL RECOVERY

• Main Author: Fauzi Winanda, Dito
• Format: Theses
• Language: Indonesia
• Subjects: Teknik kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/64171
• Institution: Institut Teknologi Bandung

This study was conducted to investigate the phenomenon of oil removal from inside pores using a self-designed microfluidic test kit. An artificial micromodel chip as a representation of porous rocks has been created with a uniform pore structure design and made of PMMA (Polymethyl Methacrylate) material. The micromodel chip has a porosity of 27.8% as well as a permeability of 2.7 Darcy. By using the microfluidic test kit, this study has investigated how low salinity water (LSW) injection with MgCl2 divalent ions of 2,000 ppm and the addition of anionic surfactant, linear alkylbenzene sulfonate mixed with nonionic surfactants, nonylphenol ethoxylate (NP-10) affects to oil recovery. The injection of LSW and surfactant solution was carried out with different injection stages, injection rates and surfactant concentrations. Visual images during the injection processes are recorded for analysis, which is the advantage of dynamic testing using this microfluidic test kit over conventional coreflooding. This investigation indicated that the selection of ions contained in LSW affected the LSW injection performance. Reducing the surfactant injection rate from 50?L/min to 20 ?L/min increased the oil recovery from 1.27% to 4.29%. Oil recovery was also higher on surfactant injection with lower interfacial tension. The interfacial tension was calculated by the Chun-Huh and Ghosh equations based on the Winsor test. From all of the injection scenarios carried out in this investigation, the highest increase in oil recovery of 26.87% OOIP was obtained by injecting surfactant solution in the secondary stage without prior LSW injection. Keywords: Low Salinity Waterflooding, Microfluidic Test Kit, Micromodel Chip, Oil Recovery, Surfactant.