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GEOREF RECORD

The effect of the invaded zone on full wavetrain acoustic logging

L. J. Baker
The effect of the invaded zone on full wavetrain acoustic logging
Geophysics (June 1984) 49 (6): 796-809

Abstract

The body of this report is devoted to studying the effect of the invaded zone, mudcake, or steel casing on the components of the full wavetrain (P-wave, S-wave, reflected modes, and Stoneley mode). I conclude that a sonic logging tool has a very shallow depth of investigation. This depth, for P- and S-waves, depends upon the spacing between the source and receiver. An approximate rule of thumb is that if the source-to-receiver separation is n feet, the logging tool sees n inches into the formation. Thus, a conventional logging tool sees less than 6 inches into the surrounding formation. Since attenuation of the P- and S-wave arrivals places a practical contraint on realistic source-to-receiver separations, the depth of investigation is limited to a maximum of about 2 ft. Therefore, an acoustic logging tool is usually capable of measuring properties of the invaded zone only.--Modified journal abstract.


ISSN: 0016-8033
EISSN: 1942-2156
Coden: GPYSA7
Serial Title: Geophysics
Serial Volume: 49
Serial Issue: 6
Title: The effect of the invaded zone on full wavetrain acoustic logging
Author(s): Baker, L. J.
Affiliation: Exxon Prod. Res. Co., Houston, TX, United States
Pages: 796-809
Published: 198406
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 11
Accession Number: 1984-053445
Categories: Applied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1984
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