Methodology

The selected line was processed in the following way:

• Conventional reprocessing of the original field data without any special regards for multiple suppression except for the usual selection of high stacking velocities. The resulting seismic section is illustrated in Figure 2 and can be considered the control section against which the results of the multiple suppression will be evaluated. It is virtually impossible to identify the multiple reflections in this section.
• Multiple suppression with Hampson's method using three different implementations of the Parabolic Radon transform: (1) SU package of Colorado School of Mines, (2) Hampson-Russell AVO package, and (3) Promax processing system. Input data were the NMO-corrected CMP gathers from the conventional processing sequence.
• Velocity analysis and stacking of primaries and multiples independently. DMO, velocity analysis and finite difference migration of primaries.

 

HR_prim_mul1.SG
Figure 4 Supergathers before multiple suppression.

 

HR_prim1.agc.SG
Figure 5 Supergathers after multiple suppression. Primaries only.