Robert Bloor

Automated C-wave Registration By Simulated Annealing

Registration of C-wave data with its corresponding P-wave data is a critical step in multicomponent data processing and interpretation. In order overcome the nonlinear nature of the problem, we use constrained simulated annealing as a global search engine, to register C-wave data into P-P time. The objective function is to maximize the similarity to compensate for the reflectivity difference between the Pand C-wave data. The frequency difference is addressed by time-varying spectral whitening. We also correct the phase difference between Pand C-wave data. Synthetic and field data examples show that the method is efficient and robust for the estimation of the vertical velocity ratio by event registration.

3D Waveform Inversion Based On Reverse Time Migration Engine

Accurate seismic imaging offers major challenges for geophysical data processing both algorithmically and computationally. To reduce computational cost, the oneway wave equation is often used at the expense of the quality available from the two-way wave equation as used in prestack reverse time migration. Recently RTM has become commercially viable and is proving to be an invaluable tool for enhancing image quality, more so more than other migration techniques (excluding gains from human experience and intervention).