Disjoining pressure and gas condensate coupling in gas condensate reservoirs

Mohammad Mohammadi-Khanaposhtani, Alireza Bahramian, Peyman Pourafshary

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Pore-scale coupled flow of gas and condensate is believed to be the main mechanism for condensate production in low interfacial tension (IFT) gas condensate reservoirs. While coupling enhances condensate flow due to transport of condensate lenses by the gas, it dramatically reduces gas permeability by introducing capillary resistance against gas flow. In this study, a dynamic wetting approach is used to investigate the effect of viscous resistance, IFT and disjoining pressure on pore-scale coupling of gas and condensate. Disjoining pressure arises from van der Waals interactions between gas and solid through thin liquid films, e.g., condensate films on pore walls. Low values of IFT and small pore diameters, as involved in many gas condensate reservoirs, give rise to importance of disjoining pressure. Calculations show that disjoining pressure postpones gas condensate coupling to higher condensate flow fractions-from about 0.08 for vanishing disjoining effect to more than 0.16 for strong disjoining effect. Results also suggest that strong disjoining effect will result in higher gas relative permeability after coupling. Finally, the positive rate effect on gas permeability is only observed when disjoining effects are weak.

Original languageEnglish
Article number042905
JournalJournal of Energy Resources Technology, Transactions of the ASME
Volume136
Issue number4
DOIs
Publication statusPublished - Dec 1 2014
Externally publishedYes

Fingerprint

Gas condensates
gas condensate
condensate
Gases
Surface tension
Gas permeability
gas
Flow of gases
permeability
Liquid films
Wetting
Lenses
Thin films
gas flow
wetting
effect
liquid

Keywords

  • disjoining pressure
  • dynamic wetting
  • gas condensate coupling
  • microchannels
  • relative permeability

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Geochemistry and Petrology

Cite this

Disjoining pressure and gas condensate coupling in gas condensate reservoirs. / Mohammadi-Khanaposhtani, Mohammad; Bahramian, Alireza; Pourafshary, Peyman.

In: Journal of Energy Resources Technology, Transactions of the ASME, Vol. 136, No. 4, 042905, 01.12.2014.

Research output: Contribution to journalArticle

@article{05b45d90ae9841d1a68f5a80713800a1,
title = "Disjoining pressure and gas condensate coupling in gas condensate reservoirs",
abstract = "Pore-scale coupled flow of gas and condensate is believed to be the main mechanism for condensate production in low interfacial tension (IFT) gas condensate reservoirs. While coupling enhances condensate flow due to transport of condensate lenses by the gas, it dramatically reduces gas permeability by introducing capillary resistance against gas flow. In this study, a dynamic wetting approach is used to investigate the effect of viscous resistance, IFT and disjoining pressure on pore-scale coupling of gas and condensate. Disjoining pressure arises from van der Waals interactions between gas and solid through thin liquid films, e.g., condensate films on pore walls. Low values of IFT and small pore diameters, as involved in many gas condensate reservoirs, give rise to importance of disjoining pressure. Calculations show that disjoining pressure postpones gas condensate coupling to higher condensate flow fractions-from about 0.08 for vanishing disjoining effect to more than 0.16 for strong disjoining effect. Results also suggest that strong disjoining effect will result in higher gas relative permeability after coupling. Finally, the positive rate effect on gas permeability is only observed when disjoining effects are weak.",
keywords = "disjoining pressure, dynamic wetting, gas condensate coupling, microchannels, relative permeability",
author = "Mohammad Mohammadi-Khanaposhtani and Alireza Bahramian and Peyman Pourafshary",
year = "2014",
month = "12",
day = "1",
doi = "10.1115/1.4027851",
language = "English",
volume = "136",
journal = "Journal of Energy Resources Technology, Transactions of the ASME",
issn = "0195-0738",
publisher = "American Society of Mechanical Engineers(ASME)",
number = "4",

}

TY - JOUR

T1 - Disjoining pressure and gas condensate coupling in gas condensate reservoirs

AU - Mohammadi-Khanaposhtani, Mohammad

AU - Bahramian, Alireza

AU - Pourafshary, Peyman

PY - 2014/12/1

Y1 - 2014/12/1

N2 - Pore-scale coupled flow of gas and condensate is believed to be the main mechanism for condensate production in low interfacial tension (IFT) gas condensate reservoirs. While coupling enhances condensate flow due to transport of condensate lenses by the gas, it dramatically reduces gas permeability by introducing capillary resistance against gas flow. In this study, a dynamic wetting approach is used to investigate the effect of viscous resistance, IFT and disjoining pressure on pore-scale coupling of gas and condensate. Disjoining pressure arises from van der Waals interactions between gas and solid through thin liquid films, e.g., condensate films on pore walls. Low values of IFT and small pore diameters, as involved in many gas condensate reservoirs, give rise to importance of disjoining pressure. Calculations show that disjoining pressure postpones gas condensate coupling to higher condensate flow fractions-from about 0.08 for vanishing disjoining effect to more than 0.16 for strong disjoining effect. Results also suggest that strong disjoining effect will result in higher gas relative permeability after coupling. Finally, the positive rate effect on gas permeability is only observed when disjoining effects are weak.

AB - Pore-scale coupled flow of gas and condensate is believed to be the main mechanism for condensate production in low interfacial tension (IFT) gas condensate reservoirs. While coupling enhances condensate flow due to transport of condensate lenses by the gas, it dramatically reduces gas permeability by introducing capillary resistance against gas flow. In this study, a dynamic wetting approach is used to investigate the effect of viscous resistance, IFT and disjoining pressure on pore-scale coupling of gas and condensate. Disjoining pressure arises from van der Waals interactions between gas and solid through thin liquid films, e.g., condensate films on pore walls. Low values of IFT and small pore diameters, as involved in many gas condensate reservoirs, give rise to importance of disjoining pressure. Calculations show that disjoining pressure postpones gas condensate coupling to higher condensate flow fractions-from about 0.08 for vanishing disjoining effect to more than 0.16 for strong disjoining effect. Results also suggest that strong disjoining effect will result in higher gas relative permeability after coupling. Finally, the positive rate effect on gas permeability is only observed when disjoining effects are weak.

KW - disjoining pressure

KW - dynamic wetting

KW - gas condensate coupling

KW - microchannels

KW - relative permeability

UR - http://www.scopus.com/inward/record.url?scp=84903289115&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84903289115&partnerID=8YFLogxK

U2 - 10.1115/1.4027851

DO - 10.1115/1.4027851

M3 - Article

VL - 136

JO - Journal of Energy Resources Technology, Transactions of the ASME

JF - Journal of Energy Resources Technology, Transactions of the ASME

SN - 0195-0738

IS - 4

M1 - 042905

ER -