Near-Real-Time Insights Across Ultra-Deepwater Frontier Basins

The Location

Location

Lower Congo, Kwanza and Namibe basins, Offshore Angola

Survey

Angola Ultra Profundo MC2D

Survey Year

2026

Data acquisition (in this study)

Multi-client 2D

Data Deliverables

Ultra-Fast Track KPSTM, Fast-Track KPSDM, Final KPSDM & RTM

Survey Size

~17,000 km

Water depth

Up to 3,500m

The Angola Ultra Profundo MC2D survey was designed to revitalize exploration across the ultra-deepwater Lower Congo, Kwanza, and Namibe basins offshore Angola. Acquired by Ramform Victory, the program represented the first multi-client 2D seismic campaign in Angola’s ultra-deepwater margin since 2015 and targeted a highly underexplored frontier region.

The survey combined Gemini Enhanced Frequency Sources (EFS), a 12 km GeoStreamer configuration, and near-real-time satellite data transfer to deliver high-quality seismic imaging over complex pre-salt, subsalt, and deepwater clastic systems. Ultra-fast data transmission and processing allowed the project team to dynamically change line locations, to ensure further data were acquired over any prospective geological features identified.

The Challenge

Imaging Frontier Ultra-Deepwater Complex Geology

The Lower Congo, Kwanza and Namibe basins are highly variable in their geology across pre- and post-salt megasequeces, with the presence of deepwater slope channel complexes interacting with complex mobile salt, volcanics and an underexplored pre-salt section. These geological features create significant imaging challenges due to strong velocity contrasts and structurally complex subsurface geometries.

The project required acquisition parameters capable of improving illumination and regional continuity from shallow post-rift systems down to crustal-scale structures.

Adapting Acquisition to Emerging Prospectivity

The survey covered frontier areas with limited modern seismic coverage, meaning geological understanding evolved continuously during acquisition. As interpreters identified new subsurface features of interest, the acquisition program needed to adapt rapidly to maximize coverage over identified play potential.

Traditional offshore workflows often lack the operational flexibility required to dynamically reposition seismic lines during acquisition campaigns, especially in ultra-deepwater environments spanning multiple basins and geological domains.

Accelerating Frontier Exploration Decisions

As operators continuously assess opportunities across Angola’s ultra-deepwater margin, compressed licensing timelines and portfolio reviews reinforce the need for fast access to high-quality seismic data and subsurface insights.

Conventional workflows and traditional data delivery methods could not provide interpreters and explorers with sufficiently rapid access to high-quality data for prospect screening and acreage evaluation.

Traditional delivery methods include physically shipping data tapes off-boat using hard-shell containers.

The Solution

Acquisition Design

Gemini EFS deployment
12 km GeoStreamer configuration

Pre-Processing Solution(s)

Modern broadband processing, including:

Machine learning denoise
Wavefield Separation & P-UP generation
Seismic interference and multiple attenuation

VMB and Imaging

Elastic Dynamic Matching FWI
KPSTM (Ultra-Fast Track), KPSDM and RTM imaging

Data Management

Accelerated LEO satellite transfer

TGS designed the Angola Ultra Profundo MC2D survey around an integrated acquisition-and-delivery workflow optimized for frontier exploration. The program combined Gemini EFS with a 12 km GeoStreamer length configuration to improve low-frequency penetration, broadband signal quality and deep imaging capability across Angola’s ultra-deepwater margin.

Near-real-time satellite data transfer enabled seismic data to be transmitted directly from the vessel to TGS processing centers, allowing ultra-fast-track products to be generated within two weeks after acquisition. This integrated workflow enabled interpreters to rapidly evaluate emerging geological features and dynamically adapt the acquisition program to maximize exploration value across the basin portfolio.

Transforming Seismic Delivery with Connected Workflows

Low-earth-orbit (LEO) satellite communications are reshaping how seismic data is transferred, processed, and interpreted. By enabling near-real-time transmission from acquisition vessel to processing center, connected workflows reduce turnaround times between acquisition and subsurface insight generation.

Faster access to seismic data supports more agile decision-making, improves collaboration between teams, and increases operational efficiency throughout the exploration lifecycle.

Discover How

The Results

Ultra-Fast Seismic Delivery

Seismic data was transmitted directly from the Ramform Victory vessel to the TGS cloud environment using low-earth-orbit (LEO) satellite communications, enabling near-real-time processing workflows. Ultra-fast-track seismic products were delivered within two weeks of acquisition, significantly accelerating interpretation and exploration screening activities. This rapid turnaround enables explorers to evaluate frontier acreage opportunities within the acquisition campaign, supporting faster technical and commercial decision-making.

Figure06_UDW2D_UFT_PSTM

Ultra-fast-track PSTM line delivered just two weeks after acquisition.

Survey Design Optimization

The rapid transfer and processing workflow enabled interpreters to identify emerging geological features during acquisition and dynamically modify the survey layout in response.

As a result, the original 11,000 km program expanded to approximately 17,000 km, supporting efficient vessel usage during this campaign and capturing additional prospective areas across the Lower Congo, Kwanza, and Namibe basins.

This adaptive acquisition strategy maximized regional geological coverage, operational efficiency and increased the exploration value of the combined dataset.

Enhanced Imaging of Frontier Systems

The combination of Gemini Enhanced Frequency Sources and 12 km offset GeoStreamer acquisition yielded good illumination and event continuity across complex deepwater geological systems. The resulting seismic data provided clear imaging of deepwater clastic depositional systems and prognosed source rocks, their interaction with volcanics and salt bodies, and crustal architecture.

The dataset supported improved regional understanding of passive margin petroleum systems and enhanced confidence in frontier exploration targeting across Angola’s ultra-deepwater margin.

Fast-track PSDM line showing: (R) Deepwater clastics, interpreted as Upper Cretaceous to Lower Tertiary in age; (S) Post-rift prognosed marine source rocks; (C) Deepwater shale seals.

Conclusion

The Angola Ultra Profundo MC2D survey demonstrates how integrated acquisition, rapid data delivery, and adaptive survey design can accelerate exploration in frontier ultra-deepwater environments. By combining Gemini EFS, long-offset GeoStreamer technology, and near-real-time satellite transfer, the project delivers modern seismic imaging capable of resolving complex pre-salt and deepwater geological systems across Angola’s offshore margin.

TGS' integrated workflow enables faster interpretation cycles, improves operational flexibility, and expands regional geological understanding across some of West Africa’s most prospective frontier basins.

Commercial impact

Accelerated Licensing Decisions

Enabled explorers to evaluate frontier acreage under short licensing timelines using ultra-fast-track seismic products.

Expanded Survey Coverage

Increased acquisition from 11,000 km to approximately 17,000 km by dynamically targeting emerging prospectivity.

Improved Exploration Confidence

High-quality imaging across pre-salt, subsalt, and deepwater channel systems supported more reliable prospect evaluation.

Strengthened Basin Understanding

Delivered new regional insights across the Lower Congo, Kwanza, and Namibe basins in areas with limited seismic coverage.

Multi-Client Commercial Model

Operators have flexible access to high-quality data for evaluating Angola’s frontier deepwater margin.

Enabled Faster Exploration Decision-Making

Interpreters could work within a seamless 3D framework rather than isolated 2D surveys, improving efficiency and shortening evaluation cycles.