f Shear-wave characteristics in the Austin chalk from three reflection lines in South Texas

In 1986, Amoco Production Company acquired multicomponent shear-wave reflection data in Dimmit, Frio, and La Salle Counties of south Texas in order to verify the use of shear-wave splitting for identifying fracture reservoirs. In this study, we analysed three survey lires along different azimuths. The shear-wave data show typical characteristics of shear-wave splitting in both data matrix and polarization image, and the variation of amplitudes and time delays of split shear-waves in the three lires can be correlated with the general trend of commercial oil production in the study area.