Patent ID: 9417352
Filing Date: 2016-08-16
CPC Classification: G01V

Claim Text:
1. A method for determining a plurality of anisotropic elastic constants, C ij , for a transversely isotropic formation, comprising: locating an acoustic tool including an acoustic source and an acoustic receiver within a borehole surrounded by the transversely isotropic formation; generating a broadband acoustic wave at the acoustic source; receiving data corresponding to an acoustic dispersion of the broadband acoustic wave at the acoustic receiver; calculating a frequency-dependent sensitivity of the acoustic dispersion to an incremental change in each of the anisotropic elastic constants, C sequentially inverting a difference between the acoustic dispersion and a reference acoustic dispersion to obtain each of the anisotropic elastic constants, wherein each inversion is performed over a select bandwidth where the frequency-dependent sensitivity of the acoustic dispersion to an incremental change in each of the anisotropic elastic constants, C