At a given pressure and temperature, differences in the velocities of propagation of P- and S-waves in rocks can indicate differences in various properties of the rocks, including porosity, lithological composition, and the fluids occupying the pore space. In the absence of direct S-wave observations, we study the response of interfaces between rock units to wavefronts with different angles of incidence to infer changes in S-wave velocities. We have used modern techniques of seismic inversion that involve P- and S-impedance estimation from various angle stacks to estimate the rock properties.

This study presents the results of a seismic inversion analysis...

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