Technical Library

Imaging the complex geology of the Faroe Shetland Basin, West of Shetlands

The Faroe Shetland Basin area located to the West of the Shetland Islands is typified by complex structural features with highly variable velocities, often with sharp contrasts.

We present an imaging workflow, incorporating an efficient high-resolution velocity model building method, to optimally image these structures, particularly focusing on Eocene sand fans and injectites. This was achieved with a combination of careful pre-processing to preserve diffraction energy and complex moveout and velocity model building with image guided tomography and phase only reflection FWI. By incorporating image guided travel time tomography constraints alongside the reflection FWI, we were able to update the background trend as well as the fine details and velocity contrasts of these features simultaneously. By doing so, we reduce the need for additional migrations and improve project turnaround.