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. We offer time and depth and pre- and post-stack solutions including least-squares Kirchhoff pre-stack depth imaging for better illumination, improved resolution and amplitude fidelity.
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.
DUG Wave reverse-time migration is a two-way, wave-equation depth migration. It is capable of handling extremely complicated structure and abrupt lateral velocity changes.
Features of DUG Wave RTM include:
> Deconvolution imaging condition
> VTI or TTI anisotropy
> Surface-offset gathers (SOG)
> Vector offset output (VOO) for higher SNR images to aid interpretation
> State-of-the-art post-processing toolkit
> Scenario RTM (sRTM) for rapid scenario testing
> Least-squares imaging solutions: LS-RTM and LS-Q-RTM for better illumination, improved resolution and amplitude fidelity and compensation for laterally and vertically varying Q.