f Detecting reservoir fractures and their orientation using multi azimuth walkaway VSP

Four walkaway VSP lines were acquired in the Kashagan East 1 well located in the Caspian Sea. Fracture orientations in the reservoir were obtained by acquiring data from multi azimuths and offsets recorded with several 3-component geophones lowered into the carbonate zone. Orientations were detected by interpreting the polarization of the fast and slow shear waves (figure 1) observed in the horizontal geophone component data.