Abstract
Summary I n an elastic waveguide such as fluid-filled borehole with a logging tool, the frequency dispersion of a guided wave mode is characterized by a monotonically varying dispersion curve. The proposed method simulates the multiparameter dispersion curve using a simple analytical function that has only a few parameters. By adjusting the parameters to fit the actual wave dispersion data with the simple function, the wave’s dispersion characteristics can be satisfactorily determined. The result of this simplistic approach leads to several important applications in acoustic logging: 1) correcting dispersion effect in the shear-wave velocity from wireline dipole logging, 2) P-wave velocity from the dispersive leaky-compressional wave data from either wireline or logging while drilling (LWD) measurement, and 3), determining shear-wave velocity from LWD quadrupole shear-wave logging.
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