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dc.contributor.authorDe Paula, Osni
dc.contributor.authorPervukhina, M.
dc.contributor.authorGurevich, Boris
dc.contributor.editorSociety of Exploration Geophysics
dc.identifier.citationDe Paula, Osni Bastos and Pervukhina, Marina and Gurevich, Boris. 2010. Testing Gassmann fluid substitution in carbonates: sonic log versus ultrasonic core measurements, SEG Denver 2010: Imaging our future, Oct 17 2010, pp. 2670-2674. Denver, Colorado: Society of Exploration Geophysicists.

The technique of fluid substitution is widely used to model elastic properties of rocks saturated with different fluids The applicability of this technique to in-situ seismic and sonic measurements is a matter of frequent debate. Most of the analysis is based on laboratory measurements, with little or no constraints from field environments. In addition, until recently, most of the data were from sand reservoirs. Applicability of Gassmann fluid substitution to carbonates is even more uncertain. To analyze this problem, we compare elastic moduli obtained using fluid substitution against the moduli obtained from sonic and density logs The dry moduli for fluid substitution are obtained from ultrasonic measurements on 50 core samples from a cretaceous reservoir buried at 5000 meters depth in Santos Basin, offshore Brazil. The good agreement between the saturated moduli obtained from cores and logs is obtained. This shows that the Gassmann equations can be applied not only in siliciclastic reservoirs, but also deep and complex carbonates reservoirs.

dc.titleTesting Gassmann fluid substitution in carbonates: sonic log versus ultrasonic core measurements
dc.typeConference Paper
dcterms.source.titleSEG Technical Program Expanded Abstracts
dcterms.source.seriesSEG Technical Program Expanded Abstracts
dcterms.source.conferenceSEG Denver 2010: Imaging our future
dcterms.source.conference-start-dateOct 17 2010
dcterms.source.conferencelocationDenver, Colorado
curtin.departmentDepartment of Exploration Geophysics
curtin.accessStatusOpen access

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