A METHOD FOR DETERMINING, DISPLAYING AND UTILIZING THE RELATIVE CHANGES OF ELASTIC MODULI AND THAT OF DENSITY OF GEOLOGIC FORMATIONS

摘要

The general object of the present invention is to provide a method for determiningand displaying the relative changes of elastic moduli and that of density of geologicformations 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 elasticmoduli are the relative change of Lame constant .DELTA..lambda./(.lambda.+2µ), the relative change of shearmodulus .DELTA.µ/(.lambda.+2µ) and/or .DELTA.µ/[k+(4/3µ], the relative change of bulk modulus.DELTA.k/[k+(4/3)µ]; and the relative change of density is .DELTA.p/p.