Experimentation and modeling of surface chemistry of the silica-water interface for low salinity waterflooding at elevated temperatures

Timothy S. Duffy, Balaji Raman, Derek M. Hall, Michael L Machesky, Russell T. Johns, Serguei N. Lvov

Research output: Contribution to journalArticle

Abstract

Models predicting wettability alteration of mineral-brine-oil interfaces during low-salinity-waterflooding (LSW) should account for the elevated temperatures typically found in oil reservoirs. For the first time, high temperature ζ-potential (zeta potential) data for silica are collected and used to interpret surface chemistries and interactions at reservoir-like conditions to predict temperature's effect on wettability alteration. Mobility data for amorphous silica in varying NaCl(aq) concentrations at 25, 100, and 150 °C and neutral pH were obtained through microelectrophoresis experiments. Calculated ζ-potentials were fit with surface complexation model (SCM) parameters to predict electrical double layer (EDL) parameters based upon the Gouy-Chapman-Stern-Grahame (GCSG) model. ζ-potentials increased with increasing temperature (around 50% increase from 25 to 150 °C) and decreasing NaCl concentrations (10 −1 –10 −4 mol kg −1 ). These trends, along with Derjaguin-Verwey-Landau-Overbeek (DLVO) theory, suggests that overall repulsive forces extend farther from the surface at low salinity and higher temperatures, implying greater wetting thickness/surface wettability in these environments. The resulting surface concentration calculations suggest that LSW is most impactful up to 10 −2 mol kg −1 of salt, and that additional dilution below 10 −3 mol kg −1 will negligibly impact oil recovery, particularly at reservoir temperatures above 100 °C. The analysis provides a framework for treating more complex reservoir systems, such as carbonates in multivalent brines.

Original languageEnglish (US)
Pages (from-to)233-243
Number of pages11
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume570
DOIs
StatePublished - Jun 5 2019

Fingerprint

Well flooding
experimentation
salinity
Surface chemistry
Silicon Dioxide
Silica
Wetting
chemistry
silicon dioxide
wettability
Water
water
Oils
Temperature
temperature
oil recovery
mineral oils
brines
Brines
Mineral oils

Keywords

  • Amorphous silica
  • Electrical double layer
  • High-temperature zeta potential
  • Low salinity waterflooding
  • Surface complexation model
  • Wettability alteration

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Experimentation and modeling of surface chemistry of the silica-water interface for low salinity waterflooding at elevated temperatures. / Duffy, Timothy S.; Raman, Balaji; Hall, Derek M.; Machesky, Michael L; Johns, Russell T.; Lvov, Serguei N.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 570, 05.06.2019, p. 233-243.

Research output: Contribution to journalArticle

@article{e04bb782a97b4f2f9295afbee931d66f,
title = "Experimentation and modeling of surface chemistry of the silica-water interface for low salinity waterflooding at elevated temperatures",
abstract = "Models predicting wettability alteration of mineral-brine-oil interfaces during low-salinity-waterflooding (LSW) should account for the elevated temperatures typically found in oil reservoirs. For the first time, high temperature ζ-potential (zeta potential) data for silica are collected and used to interpret surface chemistries and interactions at reservoir-like conditions to predict temperature's effect on wettability alteration. Mobility data for amorphous silica in varying NaCl(aq) concentrations at 25, 100, and 150 °C and neutral pH were obtained through microelectrophoresis experiments. Calculated ζ-potentials were fit with surface complexation model (SCM) parameters to predict electrical double layer (EDL) parameters based upon the Gouy-Chapman-Stern-Grahame (GCSG) model. ζ-potentials increased with increasing temperature (around 50{\%} increase from 25 to 150 °C) and decreasing NaCl concentrations (10 −1 –10 −4 mol kg −1 ). These trends, along with Derjaguin-Verwey-Landau-Overbeek (DLVO) theory, suggests that overall repulsive forces extend farther from the surface at low salinity and higher temperatures, implying greater wetting thickness/surface wettability in these environments. The resulting surface concentration calculations suggest that LSW is most impactful up to 10 −2 mol kg −1 of salt, and that additional dilution below 10 −3 mol kg −1 will negligibly impact oil recovery, particularly at reservoir temperatures above 100 °C. The analysis provides a framework for treating more complex reservoir systems, such as carbonates in multivalent brines.",
keywords = "Amorphous silica, Electrical double layer, High-temperature zeta potential, Low salinity waterflooding, Surface complexation model, Wettability alteration",
author = "Duffy, {Timothy S.} and Balaji Raman and Hall, {Derek M.} and Machesky, {Michael L} and Johns, {Russell T.} and Lvov, {Serguei N.}",
year = "2019",
month = "6",
day = "5",
doi = "10.1016/j.colsurfa.2019.03.007",
language = "English (US)",
volume = "570",
pages = "233--243",
journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",
issn = "0927-7757",
publisher = "Elsevier",

}

TY - JOUR

T1 - Experimentation and modeling of surface chemistry of the silica-water interface for low salinity waterflooding at elevated temperatures

AU - Duffy, Timothy S.

AU - Raman, Balaji

AU - Hall, Derek M.

AU - Machesky, Michael L

AU - Johns, Russell T.

AU - Lvov, Serguei N.

PY - 2019/6/5

Y1 - 2019/6/5

N2 - Models predicting wettability alteration of mineral-brine-oil interfaces during low-salinity-waterflooding (LSW) should account for the elevated temperatures typically found in oil reservoirs. For the first time, high temperature ζ-potential (zeta potential) data for silica are collected and used to interpret surface chemistries and interactions at reservoir-like conditions to predict temperature's effect on wettability alteration. Mobility data for amorphous silica in varying NaCl(aq) concentrations at 25, 100, and 150 °C and neutral pH were obtained through microelectrophoresis experiments. Calculated ζ-potentials were fit with surface complexation model (SCM) parameters to predict electrical double layer (EDL) parameters based upon the Gouy-Chapman-Stern-Grahame (GCSG) model. ζ-potentials increased with increasing temperature (around 50% increase from 25 to 150 °C) and decreasing NaCl concentrations (10 −1 –10 −4 mol kg −1 ). These trends, along with Derjaguin-Verwey-Landau-Overbeek (DLVO) theory, suggests that overall repulsive forces extend farther from the surface at low salinity and higher temperatures, implying greater wetting thickness/surface wettability in these environments. The resulting surface concentration calculations suggest that LSW is most impactful up to 10 −2 mol kg −1 of salt, and that additional dilution below 10 −3 mol kg −1 will negligibly impact oil recovery, particularly at reservoir temperatures above 100 °C. The analysis provides a framework for treating more complex reservoir systems, such as carbonates in multivalent brines.

AB - Models predicting wettability alteration of mineral-brine-oil interfaces during low-salinity-waterflooding (LSW) should account for the elevated temperatures typically found in oil reservoirs. For the first time, high temperature ζ-potential (zeta potential) data for silica are collected and used to interpret surface chemistries and interactions at reservoir-like conditions to predict temperature's effect on wettability alteration. Mobility data for amorphous silica in varying NaCl(aq) concentrations at 25, 100, and 150 °C and neutral pH were obtained through microelectrophoresis experiments. Calculated ζ-potentials were fit with surface complexation model (SCM) parameters to predict electrical double layer (EDL) parameters based upon the Gouy-Chapman-Stern-Grahame (GCSG) model. ζ-potentials increased with increasing temperature (around 50% increase from 25 to 150 °C) and decreasing NaCl concentrations (10 −1 –10 −4 mol kg −1 ). These trends, along with Derjaguin-Verwey-Landau-Overbeek (DLVO) theory, suggests that overall repulsive forces extend farther from the surface at low salinity and higher temperatures, implying greater wetting thickness/surface wettability in these environments. The resulting surface concentration calculations suggest that LSW is most impactful up to 10 −2 mol kg −1 of salt, and that additional dilution below 10 −3 mol kg −1 will negligibly impact oil recovery, particularly at reservoir temperatures above 100 °C. The analysis provides a framework for treating more complex reservoir systems, such as carbonates in multivalent brines.

KW - Amorphous silica

KW - Electrical double layer

KW - High-temperature zeta potential

KW - Low salinity waterflooding

KW - Surface complexation model

KW - Wettability alteration

UR - http://www.scopus.com/inward/record.url?scp=85062993280&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85062993280&partnerID=8YFLogxK

U2 - 10.1016/j.colsurfa.2019.03.007

DO - 10.1016/j.colsurfa.2019.03.007

M3 - Article

VL - 570

SP - 233

EP - 243

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

ER -