Visually interactive time-domain anisotropic seismic velocity analysis
Directly generate interval velocity and anisotropy parameters for improved image accuracy.
Sudden, unexpected changes in pore pressure can cause considerable damage while drilling. Accurate pore pressure estimates are crucial for casing design, column height estimation, seal integrity analysis, and overpressure compartmentalization. To estimate pore pressure accurately, an integration of petrophysical logs, drilling data, seismic velocity data, and a rock physics model that properly transfers seismic velocity to effective stress is needed.
Our pore pressure imaging experts use an integrated workflow with a proprietary rock physics model to constrain tomography, resulting in a fit-for-purpose vertical velocity model that can be accurately converted to a high-resolution pore pressure volume. The rock physics model accounts for both mechanical and non-mechanical compaction mechanisms including compaction disequilibrium, clay diagenesis, lateral transfer, burial history, and hydrocarbon buoyancy. It is fully calibrated at intermediate steps when wells logs are available but also operable in regions where no downhole information exists.
When compared with conventional velocity modeling workflows that result in large windows of uncertainty, our method produces a velocity model that is better suited to both predict high fidelity pore pressures and be used as a starting point for seismic inversions, including AVO analysis.