TY - GEN
T1 - Oil recovery enhancement in middle east heavy oil field using malonic acid based deep eutectic solvent
AU - Al-Weheibi, I.
AU - Al-Hajri, R.
AU - Al-Wahaibi, Y.
AU - Jibril, B.
AU - Mohsenzadeh, A.
N1 - Publisher Copyright:
Copyright 2015, Society of Petroleum Engineers.
PY - 2015
Y1 - 2015
N2 - This study investigates the potential of chemical solvent called deep eutectic solvents (DES) to recover the residual heavy oil left after waterflooding. For the first time to our knowledge, the effectiveness of two DESs - choline chloride-malonic acid of molar ratios 1:1 and 1:0.5 - in enhancing heavy oil recovery was thoroughly investigated. As preliminary investigations, the two solvents were characterized by measuring density, viscosity, conductivity and pH at different temperatures (20-80°C). In order to investigate the EOR potential of the solvent, measurements of interfacial tension, wettability alteration, spontaneous water imbibition, emulsification, core flood and formation damage tests were conducted at different temperatures. The core flood test was carried out at reservoir condition (pressure = 1200psi, temperature = 45-80 °C) using Berea sandstone core samples and fluids from the field of interest (formation brine and crude oil). Results of the core flood test showed the solvents produced 7-14% of the residual heavy oil after brine flooding as tertiary recovery stage and both DESs displayed better performance in enhancing the oil recovery at higher temperatures. Measurements of absolute permeabilities before and after injection of DESs/brine solutions showed no damage to the formation. Wettability alteration was found to be the dominant mechanisms for the tertiary oil recovery enhancement.
AB - This study investigates the potential of chemical solvent called deep eutectic solvents (DES) to recover the residual heavy oil left after waterflooding. For the first time to our knowledge, the effectiveness of two DESs - choline chloride-malonic acid of molar ratios 1:1 and 1:0.5 - in enhancing heavy oil recovery was thoroughly investigated. As preliminary investigations, the two solvents were characterized by measuring density, viscosity, conductivity and pH at different temperatures (20-80°C). In order to investigate the EOR potential of the solvent, measurements of interfacial tension, wettability alteration, spontaneous water imbibition, emulsification, core flood and formation damage tests were conducted at different temperatures. The core flood test was carried out at reservoir condition (pressure = 1200psi, temperature = 45-80 °C) using Berea sandstone core samples and fluids from the field of interest (formation brine and crude oil). Results of the core flood test showed the solvents produced 7-14% of the residual heavy oil after brine flooding as tertiary recovery stage and both DESs displayed better performance in enhancing the oil recovery at higher temperatures. Measurements of absolute permeabilities before and after injection of DESs/brine solutions showed no damage to the formation. Wettability alteration was found to be the dominant mechanisms for the tertiary oil recovery enhancement.
UR - http://www.scopus.com/inward/record.url?scp=84952012252&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84952012252&partnerID=8YFLogxK
U2 - 10.2118/172592-ms
DO - 10.2118/172592-ms
M3 - Conference contribution
AN - SCOPUS:84952012252
T3 - SPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings
SP - 780
EP - 792
BT - 19th Middle East Oil and Gas Show and Conference, MEOS 2015
PB - Society of Petroleum Engineers (SPE)
T2 - 19th Middle East Oil and Gas Show and Conference, MEOS 2015
Y2 - 8 March 2015 through 11 March 2015
ER -