Effective medium modeling of laboratory velocity and resistivity data on carbonates from the Apulia Platform, Italy

Carmen Gomez, Cinzia Scotellaro, Tiziana Vanorio, Jack Dvorkin, Gary Mavko

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

This paper describes joint effective-medium modeling of elastic and resistivity laboratory data obtained on a set of outcrop carbonate samples from the Apulia Platform in Italy. The challenge is to model both the elastic-wave velocity and resistivity using a single theoretical approach. The candidate models are (a) the differential effective-medium (DEM) theory and (b) the self-consistent approximation (SC). DEM may accurately describe the elastic properties but fails to describe resistivity, because it explicitly assumes that the pores are inclusions in the mineral matrix and thus lack adequate connectivity. On the other hand, SC treats both the pores and the matrix as inclusions, thus implicitly providing the connectivity needed to match the measured resistivity. At the same time, SC makes it possible to match both the elastic data and the measured resistivity using one set of model parameters. We show that SC, where the rock components are assumed conceptually symmetric, is a robust approach to modeling both velocity and resistivity in our carbonate rock samples, particularly when using needle-like pores, which tend to be stiff but well connected.

Original languageEnglish
Title of host publication79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009
PublisherSociety of Exploration Geophysicists
Pages2020-2024
Number of pages5
ISBN (Print)9781615675661
DOIs
StatePublished - 2009
Externally publishedYes
Event79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009 - Houston, United States
Duration: 25 Oct 200930 Oct 2009

Publication series

Name79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009

Conference

Conference79th Society of Exploration Geophysicists International Exposition and Annual Meeting 2009, SEG 2009
Country/TerritoryUnited States
CityHouston
Period25/10/0930/10/09

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