Pore pressure prediction based on elastic parameters derived from seismic prestack multiwave inversion

Pore pressure prediction is one of the major geological tasks related to oil and gas exploration and development. In this research, highly accurate elastic parameters, such as P- and S-wave impedance and density from seismic prestack multiwave joint inversion, are obtained and then innovatively converted to the burial depth domain. Moreover, based on the formation pressure measurements of wells with acoustic full-waveform logging data, a second-order polynomial is applied for △H/H and H via the least-square method. Finally, the pore pressure is calculated using the modified Liu’s pore pressure model. The pore pressure prediction method, which incorporates accurately calculated elastic parameters, S-wave impedance, and density, is found to have a higher prediction accuracy than methods based solely on P-wave impedance; it also provides enhanced resolution for pore pressure prediction in thin reservoirs. The presented method is particularly suitable for tight gas fields.