Extension of HLD-NAC flash calculation algorithm to multicomponent mixtures of microemulsion and excess phases

Saeid Khorsandi, Russell T. Johns

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

Current HLD-NAC theory and most simulators represent multicomponent mixtures with three lumped components, where the excess phases are also assumed pure. This can cause significant errors, and discontinuities in chemical flooding simulation for surfactant mixtures. We coupled the HLD-NAC and pseudo-phase models to develop an EOS for microemulsions where surfactant, polymer, alcohol, alkali and monovalent/divalent ions can partition differently into the excess phases and microemulsion phase as temperature and pressure are changed. We develop a pseudo-phase model to calculate partitioning of components between lumped components or namely pseudo-phases. The pseudo-phase model is based on a transformed composition space. The partitioning model is based on different mechanisms such as cation exchange like reactions for ions and surfactant hydration properties. Next, the three-pseudo-component HLD-NAC EOS is used to calculate curvature of the interface and microemulsion phase composition based on pseudo-phases. That is, the microemulsion phase consists of a curved ruled surface between water and oil pseudo-phases. Polymer partitioning is updated based on micelle radius. Finally, the phase compositions are converted back from pseudo-phase space to the original composition space. This model is the first comprehensive and mechanistic flash calculation algorithm based on HLD-NAC and pseudo-phase theory to calculate microemulsion properties for mixtures without the assumption of pure excess phases. This algorithm allows for modeling of the chromatographic separation of surfactant, soap, alcohol, alkali and polymer components in chemical flooding processes. Current microemulsion models usually ignore the differing partitioning of components between excess and microemulsion phases, generating discontinuities that slow computational time and adversely impact accuracy.

Original languageEnglish (US)
StatePublished - Jan 1 2018
EventSPE Improved Oil Recovery Conference 2018 - Tulsa, United States
Duration: Apr 14 2018Apr 18 2018

Other

OtherSPE Improved Oil Recovery Conference 2018
CountryUnited States
CityTulsa
Period4/14/184/18/18

Fingerprint

Microemulsions
surfactant
partitioning
Surface active agents
polymer
EOS
alcohol
Phase composition
discontinuity
flooding
Alcohols
Polymers
ion
Soaps (detergents)
hydration
Ions
curvature
simulator
calculation
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Geotechnical Engineering and Engineering Geology

Cite this

Khorsandi, S., & Johns, R. T. (2018). Extension of HLD-NAC flash calculation algorithm to multicomponent mixtures of microemulsion and excess phases. Paper presented at SPE Improved Oil Recovery Conference 2018, Tulsa, United States.
Khorsandi, Saeid ; Johns, Russell T. / Extension of HLD-NAC flash calculation algorithm to multicomponent mixtures of microemulsion and excess phases. Paper presented at SPE Improved Oil Recovery Conference 2018, Tulsa, United States.
@conference{84b9877579a847dca1bd95de63b68134,
title = "Extension of HLD-NAC flash calculation algorithm to multicomponent mixtures of microemulsion and excess phases",
abstract = "Current HLD-NAC theory and most simulators represent multicomponent mixtures with three lumped components, where the excess phases are also assumed pure. This can cause significant errors, and discontinuities in chemical flooding simulation for surfactant mixtures. We coupled the HLD-NAC and pseudo-phase models to develop an EOS for microemulsions where surfactant, polymer, alcohol, alkali and monovalent/divalent ions can partition differently into the excess phases and microemulsion phase as temperature and pressure are changed. We develop a pseudo-phase model to calculate partitioning of components between lumped components or namely pseudo-phases. The pseudo-phase model is based on a transformed composition space. The partitioning model is based on different mechanisms such as cation exchange like reactions for ions and surfactant hydration properties. Next, the three-pseudo-component HLD-NAC EOS is used to calculate curvature of the interface and microemulsion phase composition based on pseudo-phases. That is, the microemulsion phase consists of a curved ruled surface between water and oil pseudo-phases. Polymer partitioning is updated based on micelle radius. Finally, the phase compositions are converted back from pseudo-phase space to the original composition space. This model is the first comprehensive and mechanistic flash calculation algorithm based on HLD-NAC and pseudo-phase theory to calculate microemulsion properties for mixtures without the assumption of pure excess phases. This algorithm allows for modeling of the chromatographic separation of surfactant, soap, alcohol, alkali and polymer components in chemical flooding processes. Current microemulsion models usually ignore the differing partitioning of components between excess and microemulsion phases, generating discontinuities that slow computational time and adversely impact accuracy.",
author = "Saeid Khorsandi and Johns, {Russell T.}",
year = "2018",
month = "1",
day = "1",
language = "English (US)",
note = "SPE Improved Oil Recovery Conference 2018 ; Conference date: 14-04-2018 Through 18-04-2018",

}

Khorsandi, S & Johns, RT 2018, 'Extension of HLD-NAC flash calculation algorithm to multicomponent mixtures of microemulsion and excess phases', Paper presented at SPE Improved Oil Recovery Conference 2018, Tulsa, United States, 4/14/18 - 4/18/18.

Extension of HLD-NAC flash calculation algorithm to multicomponent mixtures of microemulsion and excess phases. / Khorsandi, Saeid; Johns, Russell T.

2018. Paper presented at SPE Improved Oil Recovery Conference 2018, Tulsa, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Extension of HLD-NAC flash calculation algorithm to multicomponent mixtures of microemulsion and excess phases

AU - Khorsandi, Saeid

AU - Johns, Russell T.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Current HLD-NAC theory and most simulators represent multicomponent mixtures with three lumped components, where the excess phases are also assumed pure. This can cause significant errors, and discontinuities in chemical flooding simulation for surfactant mixtures. We coupled the HLD-NAC and pseudo-phase models to develop an EOS for microemulsions where surfactant, polymer, alcohol, alkali and monovalent/divalent ions can partition differently into the excess phases and microemulsion phase as temperature and pressure are changed. We develop a pseudo-phase model to calculate partitioning of components between lumped components or namely pseudo-phases. The pseudo-phase model is based on a transformed composition space. The partitioning model is based on different mechanisms such as cation exchange like reactions for ions and surfactant hydration properties. Next, the three-pseudo-component HLD-NAC EOS is used to calculate curvature of the interface and microemulsion phase composition based on pseudo-phases. That is, the microemulsion phase consists of a curved ruled surface between water and oil pseudo-phases. Polymer partitioning is updated based on micelle radius. Finally, the phase compositions are converted back from pseudo-phase space to the original composition space. This model is the first comprehensive and mechanistic flash calculation algorithm based on HLD-NAC and pseudo-phase theory to calculate microemulsion properties for mixtures without the assumption of pure excess phases. This algorithm allows for modeling of the chromatographic separation of surfactant, soap, alcohol, alkali and polymer components in chemical flooding processes. Current microemulsion models usually ignore the differing partitioning of components between excess and microemulsion phases, generating discontinuities that slow computational time and adversely impact accuracy.

AB - Current HLD-NAC theory and most simulators represent multicomponent mixtures with three lumped components, where the excess phases are also assumed pure. This can cause significant errors, and discontinuities in chemical flooding simulation for surfactant mixtures. We coupled the HLD-NAC and pseudo-phase models to develop an EOS for microemulsions where surfactant, polymer, alcohol, alkali and monovalent/divalent ions can partition differently into the excess phases and microemulsion phase as temperature and pressure are changed. We develop a pseudo-phase model to calculate partitioning of components between lumped components or namely pseudo-phases. The pseudo-phase model is based on a transformed composition space. The partitioning model is based on different mechanisms such as cation exchange like reactions for ions and surfactant hydration properties. Next, the three-pseudo-component HLD-NAC EOS is used to calculate curvature of the interface and microemulsion phase composition based on pseudo-phases. That is, the microemulsion phase consists of a curved ruled surface between water and oil pseudo-phases. Polymer partitioning is updated based on micelle radius. Finally, the phase compositions are converted back from pseudo-phase space to the original composition space. This model is the first comprehensive and mechanistic flash calculation algorithm based on HLD-NAC and pseudo-phase theory to calculate microemulsion properties for mixtures without the assumption of pure excess phases. This algorithm allows for modeling of the chromatographic separation of surfactant, soap, alcohol, alkali and polymer components in chemical flooding processes. Current microemulsion models usually ignore the differing partitioning of components between excess and microemulsion phases, generating discontinuities that slow computational time and adversely impact accuracy.

UR - http://www.scopus.com/inward/record.url?scp=85050452949&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85050452949&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85050452949

ER -

Khorsandi S, Johns RT. Extension of HLD-NAC flash calculation algorithm to multicomponent mixtures of microemulsion and excess phases. 2018. Paper presented at SPE Improved Oil Recovery Conference 2018, Tulsa, United States.