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Improved estimation of mineral and fluid volumetric concentrations in thinly bedded carbonate formations

Zoya Heidari, Carlos Torres-Verdin and William E. Preeg
Improved estimation of mineral and fluid volumetric concentrations in thinly bedded carbonate formations
Geophysics (July 2013) 78 (4): D261-D269

Abstract

We recently introduced new petrophysical and compositional methods for joint interpretation of multiple conventional well logs. These inversion-based methods are suited for petrophysical interpretation of rock formations that exhibit complex solid composition, include thin beds, and are subject to mud-filtrate invasion. They combine nuclear and resistivity logs to assess porosity and volumetric/weight concentrations of mineral and fluid constituents, and are ideal for the quantitative interpretation of carbonate formations. We document the successful application of the newly introduced inversion-based interpretation methods to three carbonate formations. Interpretation results are compared to those obtained with commercial software and core/X-ray diffraction (XRD) data whenever available. For two of the carbonate field examples where XRD data are available, nonlinear joint inversion of well logs improves the assessment of porosity by more than 30% and up to 100% in the presence of thin beds when compared to conventional interpretation methods.


ISSN: 0016-8033
EISSN: 1942-2156
Coden: GPYSA7
Serial Title: Geophysics
Serial Volume: 78
Serial Issue: 4
Title: Improved estimation of mineral and fluid volumetric concentrations in thinly bedded carbonate formations
Affiliation: Texas A&M University, Harold Vance Department of Petroleum Engineering, College Station, TX, United States
Pages: D261-D269
Published: 201307
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 12
Accession Number: 2014-004274
Categories: Applied geophysicsSedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 5 tables
Secondary Affiliation: University of Texas at Austin, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 201404
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