Pre-Stack Time Migration

PGS is routinely applying Kirchhoff prestack time migration to seismic data as part of the standard processing flow. The PGS True Amplitude Kirchhoff prestack time migration (TAPSTM) is flexible enough to handle the complexity of any 3D seismic data, and can be applied to 3D data collected with irregular geometry. The algorithm is robust and it is suitable to process most modern streamer, OBC (seafloor) and land seismic datasets.

TAPSTM is an efficient and accurate migration method that can account for ray bending produced by V(z) and VTI anisotropy, and will preserve the relative amplitudes after migration. A new high order traveltime equation is used to calculate the travel times instead of ray tracing. The algorithm’s amplitude preserving weighting scheme allow the production of common image gathers suitable for AVO amplitude studies.

PC Cluster technology has made pre-stack time migration a cost effective process, with competitive turnaround times and functionality.

TAPSTM is a natural complement to the tight 3D spatial sampling and high trace densities provided by PGS' HD3D acquisition technology, ensuring artifact-free imaging, high resolution, and optimum data quality.

Kirchhoff true amplitude pre-stack time migration (TAPSTM) applied to data from offshore West Africa.