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Advanced rock-physics diagnostic analysis; a new method for cement quantification

Zakir Hossain and Lucy MacGregor
Advanced rock-physics diagnostic analysis; a new method for cement quantification (in Rock physics, Ezequiel Gonzalez (prefacer), Carlos Torres-Verdin (prefacer) and Ronny Hofmann (prefacer))
Leading Edge (Tulsa, OK) (March 2014) 33 (3): 310-316

Abstract

Rock-physics diagnostic (RPD) analysis is widely used to describe the functional relationship between seismic velocity and porosity, which is consistent with local geology, for example, characterizing diagenetic pore-filling cement and contact cements. Rock-physics studies indicate that quantitative cement substitution is as important as fluid substitution in understanding the difference between the hydrocarbon effect and the cementation effect from seismic data. Cement quantification is also important in understanding the fluid flow and mechanical strength of reservoir rocks. A new method quantifies the amount of contact and pore-filling cement by using RPD analysis. This cement-quantification method combines soft-sand, stiff-sand, and intermediate stiff-sand models and is a physical-based approach to quantify the amount of contact and pore-filling cement. By using these rock-physics models, one can examine the relationship between elastic properties and porosity in laboratory data and can link rock-physics properties to diagenesis to quantify the amount of cement. Pore-filling berthierine cements determined from thin-section analyses agree well with pore-filling cement determined from RPD analysis. The amount of contact cements determined from RPD analysis also agrees well with the amount of quartz cement determined from thin-section analyses. This new approach can be used to quantify the amount of pore-filling and contact cement from seismic properties.


ISSN: 1070-485X
EISSN: 1938-3789
Serial Title: Leading Edge (Tulsa, OK)
Serial Volume: 33
Serial Issue: 3
Title: Advanced rock-physics diagnostic analysis; a new method for cement quantification
Title: Rock physics
Author(s): Hossain, ZakirMacGregor, Lucy
Author(s): Gonzalez, Ezequielprefacer
Author(s): Torres-Verdin, Carlosprefacer
Author(s): Hofmann, Ronnyprefacer
Affiliation: Rock Solid Images, United States
Pages: 310-316
Published: 201403
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 9
Accession Number: 2014-051969
Categories: Economic geology, geology of energy sourcesSedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
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: 201428
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