Joint seismic VVAz-AVAz inversion: case study Offshore Abu Dhabi

Fracture characterization is critical for optimizing reservoir production. Velocity Variation with Azimuth (VVAz) and Amplitude Variation with Azimuth (AVAz) are the primary methods used in the industry for characterizing azimuthal anisotropy, whether fracture- or stress-induced, from PP seismic data. While each method has its strengths and limitations, they are often used separately to predict fracture networks in reservoirs. This paper presents a joint azimuthal velocity and amplitude inversion workflow for characterizing fracture orientation and intensity in a Middle East offshore carbonate reservoir, utilizing a high-density WAZ ocean-bottom cable (OBC) 3D seismic survey.