Method for measuring the near-surface shear wave velocity...

Details Method for measuring the near-surface shear wave velocity... Method for measuring the near-surface shear wave velocity...

G - Physics

01

V

G01V 1/28 (2006.01) G01V 1/30 (2006.01) G01V 1/36 (2006.01)

Patent

CA 2181848

In the presence of an anisotropic near-surface earth layer, orthogonally oriented microspreads are provided from which shear-wave velocity vectors Vse and Vsie may be determined. The respective velocities are calculated from measurements of the direct path first arrivals and of the velocity of the boundary waves propagating along the upper boundary of the near surface layer. The ratio of the near- surface shear-wave velocity vectors is used to scale the static time corrections attributable to seismic data received by shear wave sensors whose axes of responsivity coincide with the orientation of the microspreads.

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