Gemini | TGS Acquisition

Field‑proven. Client‑validated. Scaled for discovery.

Gemini Enhanced Frequency Source (EFS) is designed to generate more low-frequency energy than conventional air gun arrays while maintaining energy in typical imaging frequencies. The Gemini source extends low-frequency bandwidth for clearer imaging, improved velocity models, and more consistent 4D monitoring. Its simple, single-element design reduces complexity, improves safety, and keeps operations on track.

Built on a proven global foundation, Gemini continues to deliver consistent, high-quality data with the efficiency operators need today. And we're not stopping there. With technology investment at the forefront, we're building on that foundation to deliver greater flexibility and sharper results for every survey.

More sources. Sharper imaging. Greater efficiency.

TGS has acquired Apparition Geoservices GmbH, securing exclusive access to source separation technology. Using precise timing to encode and separate multiple sound sources, Apparition increases source capacity (currently, up to 8 sources) and acquisition efficiency without compromising data quality.

Combined with Gemini EFS, Apparition delivers efficiency gains of up to 30%, cleaner signal recovery and enhanced visibility of deep and complex subsurface targets. Where Gemini extends low-frequency bandwidth for sharper imaging, Apparition multiplies source capacity. Together, they improve survey economics across every major acquisition program.

Technical Benefits
Commercial Benefits

Technical Benefits

Cut Through the Noise

The technical benefits of Gemini EFS are rooted in its ability to deliver stronger, more consistent low-frequency energy while maintaining the broadband performance required for modern seismic workflows.

Enhanced Low-Frequency Bandwidth

Generate stronger low-frequency energy for clearer subsurface imaging and more reliable velocity model building in complex geology.

FWI-Optimized Performance

Improve low-frequency signal-to-noise for full waveform inversion, supporting better model updates and faster movement from acquisition to interpretation.

Stable Point-Source Signature

Use a single-element source with consistent angular and azimuthal behavior, simplifying designature, zero phasing, and wavelet handling.

Broadband Imaging Capability

Enhance low-end energy while preserving conventional imaging frequencies, enabling both FWI model building and high-quality reflection imaging from the same survey.

Long-Offset Readiness

Support modern OBN and long-offset acquisition designs with usable signal at very long offsets for diving-wave and direct-arrival FWI workflows.

Improved AVO/AVA Consistency

Reduce directional source variability and sidelobe effects, supporting cleaner wavelets and more reliable amplitude analysis across offsets and angles.

Lower Ultra-High-Frequency Output

Reduce unnecessary high-frequency acoustic energy while maintaining the bandwidth needed for seismic imaging and inversion workflows.

Operational Simplicity

Deploy a lower-complexity source architecture with fewer components, strong repeatability, and compatibility with existing source-vessel operations.

Commercial Benefits

Designed for Complexity. Delivered at Scale.

Not only does Gemini bring greater clarity to the subsurface with a stronger low-frequency signal, cleaner imaging, and greater confidence in complex geology, but this flexible, trusted marine seismic acquisition also carries benefits across your operations.

Faster Decisions

Improve velocity model building and accelerate FWI workflows, helping teams move from acquisition to interpretation faster.

Greater Efficiency

Increase survey productivity when Gemini is combined with complementary technologies, reducing operational complexity and improving acquisition performance.

Scalable Solutions

Adapt Gemini-enabled workflows to more complex challenges by combining the source technology with TGS’ broader acquisition, imaging, HPC, and in-house expertise.

Proven Performance

A field-proven technology backed by commercial deployment, customer recognition (including the Exxon Supplier Innovation Award 2024), and practical use in integrated survey programs.

How it Works

Gemini Enhanced Frequency Source is a single-element, large-chamber marine seismic source designed to generate stronger low-frequency energy than conventional airgun arrays while preserving the frequencies needed for standard imaging workflows. By using a large air chamber with separated fore and aft ports, Gemini shifts more source energy into the low-frequency band. This improves the signal used for full waveform inversion and velocity model building, while still supporting broadband reflection imaging.

Unlike conventional multi-element airgun arrays, Gemini behaves as a point source. This creates a more stable and consistent source signature across angles and azimuths, simplifying designature, zero phasing, wavelet handling, and FWI forward modeling. The result is a broadband source solution that supports long-offset acquisition, improves low-frequency signal-to-noise, reduces uncertainty in model building, and lowers unnecessary ultra-high-frequency acoustic output.