GEOGALS is a company with a strong seismic data processing background and work-at-sea background. We provide best-in-class time processing, depth imaging, structural interpretation, and best-in-class onboard quality control services and onboard fast-track time processing.
We process and re-process land, TZ and marine seismic data by combining the latest processing software with experienced geophysicists and efficient hardware. Our experienced onboard and onshore processing teams provide the expertise and service to achieve the highest quality 2D and 3D imaging in all geological environments.
GEOGALS's main processing hubs are in the EU, but we have the flexibility to establish project-specific centres close to our clients' offices as required.
01Processing service
Maintaining the amplitude–frequency characteristics of the signal is one of the critical conditions for reliable kinematic and dynamic interpretation. To effectively extract the signal, GEOGALS specialists employ flexible adaptive noise attenuation techniques that optimally preserve the original distribution of amplitudes and frequencies.
02Processing service
Multiple reflections — the energy of waves reflected from more than one interface — bring a high degree of uncertainty into structural interpretation and seismic reservoir characterisation. The presence of multiples complicates identification of reflections from target horizons and prevents detailed interpretation of structural and stratigraphic elements. Our processors use the most innovative methods to attenuate multiples of different nature, both before and after migration, including SRME and WEMA.
03Processing service
Noise attenuation tackles a wide range of noise including linear refractions and direct arrivals, ground roll, swell noise, spikes, cable jerk, random noise and seismic interference.
04Processing service
One project may contain several seismic surveys obtained in different geological environments using different acquisition designs and parameters. Correct integration and regularisation of heterogeneous seismic data sets is a key determinant of the effectiveness of all subsequent processing procedures. Our processors have decades of experience in the balancing and regularisation of 3D seismic data sets obtained under different conditions.
05Processing service
TZ, land and marine time imaging is an integral part of our processing and imaging services. Velocity model building and imaging are state of the art. Since the result of time and depth migration strongly depends on the quality of the velocity model, migrated depth gathers provide optimal data to refine the velocity. The seismo-geological features of a particular area and survey design parameters dictate the choice of the optimal migration algorithm — often to extremely tight deadlines. Extensive experience with various migration algorithms allows us to select and recommend the most effective option for a specific geological setting.
06Processing service
De-ghosting and designature techniques aim to create a simple and robust seismic wavelet to ensure reliable subsurface information can be extracted from the recorded data. The seismic energy emitted by the sources consists of two constituents: one propagates directly downwards into the subsurface, the second — the source ghost — first propagates upwards to the sea surface before being reflected to propagate as a down-going wavefield. Source de-ghosting generates single-event responses of the sources from the doublet responses recorded due to sea-surface reflections.
Delivery
Specialists and resources are chosen according to the project timeline and are never shared between projects. Further processing steps begin as soon as possible and run in parallel — so the client can take results earlier, or use the time for extra products and recommendations.
Start a project
Acquisition parameters, data volume, objectives, timeline. Our geophysicists come back with a processing sequence and a realistic view of the result — not a brochure.