DUG’s model building workflow incorporates both full waveform inversion and high-resolution reflection tomography. The entire workflow, including all interactive parts, is performed in DUG Insight, our 2D/3D/pre-stack interpretation system — allowing the geophysicist to immerse themselves in the data.
Kirchhoff migration uses the integral form of the wave equation (Kirchhoff integral) to back-propagate the seismic wavefield.
Geological complexities in the overburden (for example structure, gas hydrates, shallow gas and carbonate reefs) result in spatially varying and frequency dependent attenuation of the recorded seismic wavefield. DUG MigQ is a pre-stack depth migration-based workflow that compensates for laterally and vertically varying attenuation (or quality factor Q). In order to compensate for attenuation a Q model must first be estimated. DUG TomoQ is a robust frequency-dependent Q tomography process.
RTM is a two-way, wave equation migration that operates in the shot domain. DUG RTM is capable of handling extremely complicated structure and abrupt lateral velocity changes.
Features of DUG RTM include:
> Output sparse or dense angle gathers or surface offset
> State of the art post-processing toolkit and interpretation
> Isotropic and anisotropic (VTI, TTI)
> Vector offset output (VOO) for high SNR images to aid
> DUG sRTM for rapid scenario testing
> DUG Q-RTM to compensate for laterally and vertically
> DUG LS-RTM for better illumination, improved resolution and amplitude fidelity.