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dc.contributor.authorMakarynska, Dina
dc.contributor.authorGurevich, Boris
dc.contributor.editorSociety of Exploration Geophysicists SEG
dc.identifier.citationMakarynska, DIna and Gurevich, Boris. 2008. Fluid substitution in heavy oil rocks, in Society of Exploration Geophysicists. (ed), 78th Annual SEG Meeting, Nov 9 2008, pp. 1699-1703. Las Vegas, USA: Society of Exploration Geophysics.

Heavy oils are defined as having high densities and extremely high viscosities. Due to their viscoelastic behavior the traditional rock physics based on Gassmann theory becomes inapplicable. In this paper, we use effective-medium approach known as coherent potential approximation or CPA as an alternative fluid substitution scheme for rocks saturated with viscoelastic fluids. Such rocks are modelled as solids with elliptical fluid inclusions when fluid concentration is small and as suspensions of solid particles in the fluid when the solid concentration is small. This approach is consistent with concepts of percolation and critical porosity, and allows one to model both sandstones and unconsolidated sands. We test the approach against known solutions. First, we apply CPA to fluid-solid mixtures and compare the obtained estimates with Gassmann results. Second, we compare CPA predictions for solid-solid mixtures with numerical simulations. Good match between the results confirms the applicability of the CPA scheme. We extend the scheme to predict the effective frequency- and temperature-dependent properties of heavy oil rocks. CPA scheme reproduces frequency-dependent attenuation and dispersion which are qualitatively consistent with laboratory measurements and numerical simulations. This confirms that the proposed scheme provides realistic estimates of the properties of rocks saturated with heavy oil.

dc.publisherSociety of Exploration Geophysics
dc.titleFluid substitution in heavy oil rocks
dc.typeConference Paper
dcterms.source.titleSociety of Exploration Geophysicists SEG, Las Vegas 2008 Annual Meeting
dcterms.source.seriesSEG Las Vegas 2008 Annual Meeting
dcterms.source.conference78th Annual SEG Meeting
dcterms.source.conference-start-date9 Nov 2008
dcterms.source.conferencelocationLas Vegas, USA
dcterms.source.placeLas Vegas

Published by the Society of Exploration Geophysicists.


Copyright © 2008 Society of Exploration Geophysicists.


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curtin.accessStatusOpen access
curtin.facultyDepartment of Exploration Geophysics
curtin.facultyFaculty of Science and Engineering
curtin.facultyThe Western Australian School of Mines

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