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The effect of pressure and porous media structural parameters coupling on gas apparent viscosity.

Abunumah, Ofasa; Ogunlude, Priscilla; Gobina, Edward

Authors

Ofasa Abunumah

Priscilla Ogunlude



Abstract

Crude oil production is still considered a significant contributor to global energy security. To improve oil production, gases such as CH4, N2, Air and CO2 are injected into oil reservoirs in a process called gas Enhanced Oil Recovery (EOR). Authors have used several engineering, geological and geometrical quantities to characterise oil reservoirs and evaluate immiscible gas EOR processes. Viscosity is one of such critical engineering quantities. However, the relationships between viscosity and structural parameters, such as porosity, pore size, and aspect ratio, have not been directly investigated in the literature. This paper investigated the coupling effect of pressure and structural parameters on the apparent viscosity of EOR gases in reservoir pore matrix through rigorous data mining and experimental approaches. The data mining analyses demonstrated that EOR reservoirs are characterised by viscosity and porosity. The experimental investigation indicated that the viscosity of injected EOR gases increases with pressure and pore size, decreases with porosity, and initially decreases before increasing with aspect ratio. The study concluded that CO2 is the most influenced by porosity, and CH4 is the least. Furthermore, N2 is the most responsive to pore size and aspect ratio, while CH4 is the least responsive.

Citation

ABUNUMAH, O., OGUNLUDE, P. and GOBINA, E. 2021. The effect of pressure and porous media structural parameters coupling on gas apparent viscosity. In 2021 TUBA (Turkish Academy of Science) World conference on energy science and technology (TUBA WCEST-2021) book of abstracts, 8-12 August 2021, [virtual conference]. Ankara: Turkish Academy of Sciences [online], pages 88-89. Available from: https://doi.org/10.53478/TUBA.2021.017

Presentation Conference Type Lecture
Conference Name 2021 TUBA (Turkish Academy of Science) World conference on energy science and technology (TUBA WCEST-2021)
Conference Location [virtual conference]
Start Date Aug 8, 2021
End Date Aug 12, 2021
Publication Date Aug 12, 2021
Deposit Date Sep 13, 2021
Publicly Available Date Sep 23, 2021
DOI https://doi.org/10.53478/TUBA.2021.017
Keywords Viscosity; Reservoir characterisation; Porosity; Pore size; EOR gases
Public URL https://rgu-repository.worktribe.com/output/1411469
Additional Information ISBN: 9786052249758

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