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Title: Thermodynamic modeling of the temperature impact on low-salinity waterflooding performance in sandstones

Abstract

Low-salinity waterflooding has emerged as an innovative technique to improve oil recovery. Extensive research has been devoted to providing a better understanding of the mechanisms involved and to optimize its performance. Among those mechanisms, multi-component ion exchange mechanism explains the coordination of surface complexes in a way that highlights the essence of low-salinity waterflooding. However, the impact of temperature on low-salinity waterflooding is still poorly understood. We used surface complexation modeling to study both the oil/brine and mineral/brine interfaces up to a temperature of 150 °C. Given the heterogeneity of the oil interface, we studied three oil interfaces with varying total base number to total acid number ratios. It was determined that temperature is a critical factor in estimating the performance of low-salinity waterflooding. While temperature reduces the pH range at which low-salinity waterflooding yields positive effect for basic oil, it shifts the pH window at which low-salinity waterflooding has potentially negative results to lower pH values for neutral oil. In addition, the temperature magnifies the ability of low-salinity waterflooding to enhance surface potential. Furthermore, our results support the need for conducting experimental work at the relevant reservoir temperature to evaluate the performance of low-salinity waterflooding.

Authors:
 [1]; ORCiD logo [1];  [1];  [1]
  1. Mewbourne College of Earth and Energy, Norman, OK (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
Universities/Institutions; USDOE
OSTI Identifier:
1576939
Report Number(s):
LA-UR-19-28076
Journal ID: ISSN 0927-7757
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Colloids and Surfaces. A, Physicochemical and Engineering Aspects
Additional Journal Information:
Journal Volume: 586; Journal ID: ISSN 0927-7757
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Earth Sciences

Citation Formats

Mansi, Mohamed, Mehana, Mohamed, Fahes, Mashhad, and Viswanathan, Hari. Thermodynamic modeling of the temperature impact on low-salinity waterflooding performance in sandstones. United States: N. p., 2019. Web. doi:10.1016/j.colsurfa.2019.124207.
Mansi, Mohamed, Mehana, Mohamed, Fahes, Mashhad, & Viswanathan, Hari. Thermodynamic modeling of the temperature impact on low-salinity waterflooding performance in sandstones. United States. doi:10.1016/j.colsurfa.2019.124207.
Mansi, Mohamed, Mehana, Mohamed, Fahes, Mashhad, and Viswanathan, Hari. Sat . "Thermodynamic modeling of the temperature impact on low-salinity waterflooding performance in sandstones". United States. doi:10.1016/j.colsurfa.2019.124207.
@article{osti_1576939,
title = {Thermodynamic modeling of the temperature impact on low-salinity waterflooding performance in sandstones},
author = {Mansi, Mohamed and Mehana, Mohamed and Fahes, Mashhad and Viswanathan, Hari},
abstractNote = {Low-salinity waterflooding has emerged as an innovative technique to improve oil recovery. Extensive research has been devoted to providing a better understanding of the mechanisms involved and to optimize its performance. Among those mechanisms, multi-component ion exchange mechanism explains the coordination of surface complexes in a way that highlights the essence of low-salinity waterflooding. However, the impact of temperature on low-salinity waterflooding is still poorly understood. We used surface complexation modeling to study both the oil/brine and mineral/brine interfaces up to a temperature of 150 °C. Given the heterogeneity of the oil interface, we studied three oil interfaces with varying total base number to total acid number ratios. It was determined that temperature is a critical factor in estimating the performance of low-salinity waterflooding. While temperature reduces the pH range at which low-salinity waterflooding yields positive effect for basic oil, it shifts the pH window at which low-salinity waterflooding has potentially negative results to lower pH values for neutral oil. In addition, the temperature magnifies the ability of low-salinity waterflooding to enhance surface potential. Furthermore, our results support the need for conducting experimental work at the relevant reservoir temperature to evaluate the performance of low-salinity waterflooding.},
doi = {10.1016/j.colsurfa.2019.124207},
journal = {Colloids and Surfaces. A, Physicochemical and Engineering Aspects},
number = ,
volume = 586,
place = {United States},
year = {2019},
month = {11}
}

Journal Article:
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This content will become publicly available on November 16, 2020
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