Experimental investigation of the effect of nanoparticles and polymer on interfacial tension between oil and water during Enhanced Oil Recovery (EOR)

Rashid, FMS 2021, Experimental investigation of the effect of nanoparticles and polymer on interfacial tension between oil and water during Enhanced Oil Recovery (EOR) , MSc by research thesis, University of Salford.

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Abstract

Nanotechnology has been generally used in several other industries, and the interest in it within the oil industry is increasing, due to its potential to deeply change enhanced oil recovery (EOR) and to improve the mechanism of recovery. With the decline in oil discoveries during the last decades, it is believed that EOR technologies will play a key role to meet the energy demand in years to come. New materials and additives are needed to make EOR economical in challenging reservoirs or harsh environments. Nanoparticles have been widely studied for EOR, but nanoparticles with polymer chain joined to the surface, known as polymer-coated nanoparticles (PNPs), are an emerging class of materials that may be better than nanoparticles for EOR due to enhanced solubility and stability, greater maintenance of foams and emulsions, and more facile conveyance through porous media This research study experimentally investigates the interfacial tension (IFT) of silica/gum-Arabic) in the presence brine at different temperature to enhanced and improve oil recovery. The study also investigate experimentally the pH value of brine and in combination with nanoparticles and polymer for liquid characterization. The results obtained for the prepared nano polymer fluid by dispersion of hydrophilic Silica and Gum Arabic in three different concentrations of brine (15%, 10%, 5%) showed variability and agglomeration. The nanopolymer fluids became cloudy due to the aggregation and sedimentation of nanopolymer particles, and this demonstrates that NaCl concentrations exceeded the critical salt concentrations (CSC) in the solution. However, the stability would not be controlled by decreasing the concentrations of NaCl, since the size of the nanopolymer particles that have been used in this experiment is 20nm, which is greater than 15nm particles that has a CSC of 0.5wt%. Additionally, the results of the interfacial tension between the brine 1.5wt% and oil decreased from 17.48mN/m to 12.58mN/m when the temperature increased from 30℃ to 50℃. Similar behaviour was observed at 70˚C, 90˚C and 100˚C with a recorded IFT of 12.1, 5.75 and 5.74mN/m. The IFT between oil and 1.5wt.% brine-based combinations (silica (0.15wt%) + Gum Arabic (0.4wt%) particles was 17.48mN/m at 30℃. It then decreased to 12.58mN/m at 50℃ and to 5.75mN/m and 5.74mN/m at 90℃ and 100℃, demonstrating that the best results are at the lower temperature 30℃ and at the higher temperature of 100℃,where interfacial tension reduced from 17.48mN/m to 5.74mN/m, with a reduction of almost 67.17%. Conclusively, The IFT tends to decrease significantly even with increasing and decreasing the combination of silica nanoparticles and gum Arabic polymer concentration. Although, fluid 5 with 15% brine shows more efficient in lowering IFT compared with the other combinations, fluid 5 solutions were able to reduce IFT the most at 100°C, thus, fluid 5 solution also gives the lowest IFT values at 30°C. Therefore, these percentage of Brine 15% + (silica (0.15wt%) + Gum Arabic (0.4wt%) could be a very good combination for enhance oil recovery.

Item Type: Thesis (MSc by research)
Contributors: Abbas, AJ (Supervisor) and Nasr, GG (Supervisor)
Schools: Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre
Depositing User: Mr Fahad Mohamed Sharif Rashid
Date Deposited: 05 Feb 2021 09:48
Last Modified: 05 Mar 2021 02:31
URI: http://usir.salford.ac.uk/id/eprint/59110

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