Optimal Design of Alkaline–Surfactant–Polymer Flooding under Low Salinity Environment
1
Department of Energy and Mineral Resources Engineering, Sejong University, Seoul 05006, Korea
2
Department of Energy and Resources Engineering, Kangwon National University, Chuncheon, Kangwon 24341, Korea
3
Petroleum Engineering Department, Bandung Institute of Technology, Bandung 40132, Indonesia
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(3), 626; https://doi.org/10.3390/polym12030626
Received: 3 February 2020
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Revised: 25 February 2020
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Accepted: 6 March 2020
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Published: 9 March 2020
(This article belongs to the Section Polymer Applications)
This paper presents an optimal design of alkaline–surfactant–polymer (ASP) flooding and an experimental analysis on the effects of ASP components under low formation salinity, where the assignment of salinity gradients and various phase types are limited. The phase behavior and coreflooding tests confirmed the ASP formula is optimal, i.e., 1 wt % sodium carbonate (Na2CO3) as the alkaline, 1:4 weight ratio for linear alkylbenzene sulfonate (LAS) and dioctyl sulfosuccinate (DOSS) as a surfactant, 5 wt % diethylene glycol monobutyl ether (DGBE) as a co-solvent, and hydrolyzed polyacrylamide (HPAM) as a polymer. The salinity scan was used to determine that the optimum salinity was around 1.25 wt % NaCl and its solubilization ratio was favorable, i.e., approximately 21 mL/mL. The filtration ratio determines the polymer concentrations, i.e., 3000 or 3300 mg/L, with a reduced risk of plugging through pore throats. The coreflooding test confirmed the field applicability of the proposed ASP formula with an 86.2% recovery rate of residual oil after extensive waterflooding. The optimal design for ASP flooding successfully generated phase types through the modification of salinity and can be applicable to the low-salinity environment.
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Keywords:
low salinity; alkaline–surfactant–polymer flooding; optimal design; optimal salinity; co-solvent
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MDPI and ACS Style
Novriansyah, A.; Bae, W.; Park, C.; Permadi, A.K.; Sri Riswati, S. Optimal Design of Alkaline–Surfactant–Polymer Flooding under Low Salinity Environment. Polymers 2020, 12, 626. https://doi.org/10.3390/polym12030626
AMA Style
Novriansyah A, Bae W, Park C, Permadi AK, Sri Riswati S. Optimal Design of Alkaline–Surfactant–Polymer Flooding under Low Salinity Environment. Polymers. 2020; 12(3):626. https://doi.org/10.3390/polym12030626
Chicago/Turabian StyleNovriansyah, Adi, Wisup Bae, Changhyup Park, Asep K. Permadi, and Shabrina Sri Riswati. 2020. "Optimal Design of Alkaline–Surfactant–Polymer Flooding under Low Salinity Environment" Polymers 12, no. 3: 626. https://doi.org/10.3390/polym12030626
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