TGS combines GeoStreamer and flexible hybrid capabilities to deliver high-fidelity, broadband imaging in complex subsurface areas. Data is rich in both low- and high-frequency signal, ideal for high-fidelity reservoir monitoring, high-resolution imaging at all target depths and recovery of accurate geological properties during reservoir characterization.

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Before Image After Image
Conventional (hydrophone)
GeoStreamer (P-UP)

Wavefield Separation

Wavefield separation is a critical step in broadband seismic imaging workflows applied to GeoStreamer and node seismic data. The pressure and velocity sensors record each upgoing seismic event with equal polarity, while the time-delayed downgoing seismic event has opposite polarity. A simple summation and subtraction of the two measured seismic events yields the total up-going (P-UP) and downgoing (P-DWN) pressure wavefields.

Data-Driven Q Modelling

Advanced depth imaging incorporating attenuation (Q) effect can unlock substantial value from legacy seismic, delivering a significantly improved subsurface image and a more reliable basis for exploration and development. By integrating modern data conditioning, high‑resolution velocity model building and explicit Q compensation in depth imaging, TGS' workflow successfully mitigates the combined detrimental effects of near‑surface heterogeneity, shallow gas, and absorption on seismic amplitudes and kinematics.

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Legacy KPSDM section
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Q-KPSDM section
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Corresponding vertical velocity
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Q model overlaid on seismic section
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Multi-Survey Matching

Multi-survey matching enables datasets acquired across different vintages to be combined into a consistent seismic volume. Spectral, amplitude and phase differences can introduce discontinuities and limit the value of integrated interpretations. TGS offers modern solutions to address these challenges, combining advanced signal processing, model-based corrections and machine learning technologies to deliver seamless results. This includes innovative ML-driven workflows such as the augmented deghosting solution demonstrated in the Krishna-Godavari Basin case study.

nD Regularization (3D/4D/5D)

TGS offers 3D, 4D and 5D regularization based on the Anti-Leakage Fourier Transform (ALFT) with additional anti-alias protection. In addition to those, TGS also offers regularization based on Minimum Weighted Norm Interpolation (MWNI) and Projection Onto Convex Sets (POCS).

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Common offset: Before regularization
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Common offset: After regularization

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Discuss Your Seismic Data Needs

Every need is different and we'd like the opportunity to discuss yours further. Speak to one of our data or geoscience experts to customize seismic solutions specific to your requirements.