Abstract

Detail study of faults and fractures plays vital role in understanding the subsurface and thereby helps in drilling the successful wells. The traditional available fracture characterization techniques mostly rely on well data; therefore, the results are reliable in and around the well bore and unable to map the lateral extent of fracture sets. Moreover, such results are obtained only after drilling the well. Whereas the methodology applied in this paper is a seismic azimuthal anisotropy driven independent measurement. So, it is very efficient to delineate fracture sets, their vertical extent, inter-zonal connectivity and localized stress distributions. In this paper, an approach of Local angle domain imaging followed by Azimuthal anisotropy analysis is discussed with case study from central India. The subsurface imaging brought out by Azimuthal Anisotropy (Fracture Characterization) has shown better fault and fracture network system. The results of kinematic velocity vs. azimuth (VVAz) analysis and dynamic amplitude vs. azimuth (AVAz) inversion has brought out the detail information about the fractures in the area. The results were compared with available well log data and found the match with geological information, which indicates the effectiveness of this approach.