Method of determining, displaying and using the relative changes of elastic modulus and density of underground rock
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United States of America Patent
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Jul 18, 2000
Grant Date -
N/A
app pub date -
Sep 29, 1998
filing date -
Nov 22, 1995
priority date (Note) -
Expired
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Abstract
The general object of the present invention is to provide a method for determining and displaying the relative changes of elastic moduli and that of density of geologic formations and for utilizing these relative changes and plottings for gas/oil exploration, especially for direct gas and light oil detection. The said relative changes of elastic moduli are the relative change of Lame constant .DELTA..lambda./(.lambda.+2.mu.), the relative change of shear modulus .DELTA..mu./(.lambda.+2.mu.) and/or .DELTA..mu./[.kappa.+(4/3).mu.], the relative change of bulk modulus .DELTA..kappa./[.kappa.+(4/3).mu.]; and the relative change of density is .DELTA..rho./.rho..
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