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A NEW APPROACH FOR DERIVING PSEUDOVELOCITY LOGS FROM RESISTIVITY LOGS 1
Author(s) -
DOS SANTOS W. L. BRITO,
ULRYCH T. J.,
LIMA O. A. L.
Publication year - 1988
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1988.tb02151.x
Subject(s) - electrical resistivity and conductivity , geology , lithology , sedimentary rock , well logging , regional geology , range (aeronautics) , igneous petrology , gemology , mineralogy , petrology , hydrogeology , geophysics , metamorphic petrology , engineering geology , seismology , geotechnical engineering , volcanism , geochemistry , materials science , tectonics , physics , composite material , quantum mechanics
This paper describes a method of generating pseudovelocity logs using measurements of electrical resistivity. A theoretical relation between electrical resistivity and transit time, which is applicable to a wide range of lithologies, has been developed. The application of this relation using a method which defines lithoresistivity zones as lithological intervals related to the same formation and showing small resistivity variations, has been tested in the Recôncavo sedimentary basin in Bahia, Brazil. A comparison of derived pseudovelocity logs with actual sonic logs for five wells whows the validity of the present approach.