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Seismic data processing
services
Bulwark
Services Limited DP centre is primarily established in Nigeria to offer a
high tech state-of-the-art imaging solutions to the E & P in Nigeria. To
actualize this dream, we formed a JV with GX Technology Corporation, a
world leading imaging company, for technology transfer to local staff. At
the moment, Bulwark Services Limited is the only Nigerian Company which
has a fully operational seismic data processing centre.
We offer
high-quality pre-processing, time and depth imaging services.
Pre-processing
Our pre-processing
algorithms are focused on the analysis and suppression of noise,
including seismic interference, swell noise and multiples. We also
Pre-processing activities
at the Bulwark/ION-GXT centre are designed to especially meet the needs
of high-end, detailed and superior quality data conditioning and
imaging. The primary focus is to create an assembly of main processing
tools that are necessary in today’s difficult-to-image subsurface
geology. The operation on cluster-based parallel processing environments
means that we can execute our time processing routines within the same
efficient environment as our imaging. Algorithms are developed and
continually upgraded upon challenges, to focus on the analysis and
suppression of noise, including seismic interference, swell noise and
multiples. We also offer specialized pre-processing services such as
apex-shifted multiple attenuation, 2D/3D surface related multiple
elimination high resolution radon demultiple, beam radon demultiple. We
also offer specialized pre-processing techniques of shear-leakage
removal and high-end mirror sum dual sensor summation on multicomponent
data.
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From
the 3D migration standpoint, in GXT we offer Kirchhoff preSTM,
Kirchhoff preSDM, and several wavefield extrapolation (WE) preSDM
algorithms.
The main focus of Bulwark Services Limited is to be Nigeria’s leader
in pre-stack time and depth imaging. The heart of our time imaging
is true and relative amplitude processing, essential for fulfilling
the needs of AVO, 4D and advanced imaging solutions. Our noise
removal modules are AVO consistent, avoiding statistical,
deterministic processing that could adversely and irreparably damage
the data in terms of the ability to preserve information content.
For
model building, we offer two varieties of tomographic inversion (a
layer based scheme using preSTM finite-offset picks and a gridded
scheme using preSDM finite-offset picks) in addition to preSDM CRP
scanning and model perturbation image scanning techniques.
We also take anisotropy into account if we have sufficient well
control in our velocity model building. |
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From the 3D migration standpoint, in GXT we offer
Kirchhoff preSTM, Kirchhoff preSDM, and several wavefield extrapolation (WE)
preSDM algorithms. These algorithms are capable of accurately modeling ray
bending, thereby they are able to account for fourth and higher order NMO
corrections. |
