| 摘要 |
A method and system of dual wavefield reinforcement or increasing the contributions to each image point in the seismic image can be accomplished by aligning the upward traveling energy, U, and the downward traveling energy, D, and then summing U and D in the stacking process. A method of dual wavefield reinforcement includes receiving seismic data having both up going and down going wavefields. The up going wavefields are separated from the down going wavefields. Pre-NMO and post NMO statics for each of said up going and said down going wavefields are calculated. The determined pre-NMO static is applied to each of the up going and the down going wavefields. NMO/DMO stacking velocities for the seismic data on an up going wavefield floating datum is determined. Using a difference between the up going wavefield floating datum and the down going wavefield floating datum and the NMO/DMO stacking velocities for the seismic data on an up going wavefield floating datum the NMO/DMO stacking velocities for the seismic data on a down going wavefield floating datum can be determined. The NMO/DMO stacking velocities for the seismic data on the up going wavefield floating datum and the down going wavefield floating datum is applied. The determined post NMO statics are applied to bring each of the up going and the down going wavefields to the final datum. The up going and the down going wavefields are summed to provide dual wavefield reinforcement. |
