Estimation of elastic moduli based on Prestack simultaneous inversion of an oil field in the Persian Gulf

Proper utilization of 3D seismic data in the upstream oil industry is one of the crucial steps in field developments. Many attributes are used to obtain models of facies distribution in a reservoir. Using prestack inversion methods on 3D seismic data and extracting prestack attributes such as elastic properties play very important roles in precise estimation of reservoir properties. The results of prestack seismic inversion in the oil reservoirs are investigated in this study. Simultaneous prestack inversion provides more details of acoustic impedance section rather than the poststack inversion. Moreover, the compressional acoustic impedance extracted from simultaneous inversion is more accurate than the one obtained from poststack inversion. In addition to the compressive acoustic impedance, shear impedance and density, the elastic parameters can be extracted from simultaneously prestack inversion. The purpose of this research is to transform the prestack inversion products into the geomechanical parameters including Young’s modulus and Poisson’s ratio. Young’s modulus and Poisson’s ratio have been used in geophysical algorithms to detect the well drilling trajectory and estimate the stress direction. These parameters can also be used in fluid detection studies.