WesternGeco has over 10 years’ experience of acquiring high-fidelity ocean-bottom cable (OBC) multicomponent surveys in different locations and environments worldwide. A WesternGeco
Q-Seabed multicomponent seismic crew recently completed a year-long 3D acquisition project offshore Angola. The 1,100 km2 survey ranks amongst the largest OBC multicomponent surveys ever acquired offshore West Africa.
The crew, made up of over 120 people, operated in a demanding environment with challenging currents and shallows. The survey was acquired over a highly congested, active oilfield with many platforms, installations, pipelines, and single point mooring systems (SPMs). Consequently, logistical plans had to be precisely formulated and adapted to the variable conditions.
A significant volume of seismic data were processed onboard providing quick-look migrated data cubes for interpretation, quality control, and illumination.
OBC is a marine data collection system used in both deep and shallow water and congested oilfield areas. The method involves laying seismic cables on the sea bottom. The benefits of having a very large receiver spread, such as that offered by the Q-Seabed system, in OBC surveys, include improved efficiency and fold distribution, particularly for longer offsets, and eliminated duplicate source and receiver effort. The unique Q-Seabed system design ensures uniform coupling in all directions and unmatched data fidelity.