Imaging the Morrow A Sandstone Using Shear Wave VSP Data, Postle Field, Oklahoma
Figure 9
(a) Two flexural wave dispersion curves measured in well HMU 24-4. The red and blue circles represent fast and slow flexural waves, respectively. The cyan circles showes the Stoneley wave. The crossover pattern between the fast and slow dispersion curves show that the type of the anisotropy is stress-induced anisotropy. (b) The sonic scanner data suggest that the fast shear wave polarization azimuth is 126 deg at the reservoir level (from 1878 m to 1896 m) and 108 deg for the entire logged section (from 1219 m to 1896 m).
