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Seismic Data Processing

Overview

GEOGALS it is a company with 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 your 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 you with the expertise and service to achieve the highest quality 2D and 3D imaging in all geological environments.

Our software has been entirely developed on modern and provides a modern, highly interactive and user friendly platform for all aspects of processing and imaging.

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.

Amplitude Friendly Processing

Maintaining the amplitude-frequency characteristics of the signal is one of the critical conditions for a reliable kinematic and dynamic interpretation. To effectively extract the signal GEOGALS specialists employ flexible adaptive noise attenuation techniques that allow optimally to preserve the original distribution of amplitudes and frequencies.

Amplitude Friendly Processing

Multiple reflections, or the energy of waves reflected from more than one interface, bring a high degree of uncertainty in structural interpretation and seismic reservoir characterisation. The presence of multiples complicates the identification of reflections from the target horizons and does not allow a detailed interpretation of structural and stratigraphic elements in a study interval.

Our seismic data processors use the most innovative methods to attenuate multiples of different nature, both before and after migration, including such procedures as SRME, WEMA.

Seismic

Noise Attenuation

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.

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Data Merging and Regularisation

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 seismic data processors have decades of experience in the balancing and regularisation of 3D seismic data sets obtained by different conditions.

Seismic

Time Imaging

TZ, land and marine time imaging is an integral part of our Processing and Imaging services. The velocity model building and imaging are state of the art. Since the result of time and depth migration is strongly dependent on the quality of the velocity model, the migrated depth gathers provide an 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 to achieve the geological task often to extremely tight deadlines. Extensive experience in the application of various migration algorithms allows us to select and recommend the most effective option for optimal imaging in a specific geological setting.

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De-Ghostingand Designature techniques

Deghosting 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 seismic sources consists of two constituents: one component propagates directly downwards into the subsurface, the second component, often referred to as the source ghost, first propagates upwards to the sea-surface before it is reflected at the sea-surface again to propagate as a down-going wavefield.

Source deghosting is applied to generate single event responses of the sources from the doublet responses recorded because of the presence of reflections from the sea-surface.

Seismic