Seismic Acquisition: The Foundation of Angola’s Exploration Renaissance
Seismic surveying is the essential first step in petroleum exploration, providing the subsurface images that guide drilling decisions and de-risk investment in unproven acreage. In Angola, a new cycle of seismic acquisition activity is underway, driven by Shell’s 17-block exploration commitment, ANPG’s push to reactivate dormant acreage, and the geological excitement surrounding the Kwanza and Namibe Basin frontiers.
After a prolonged period of reduced exploration expenditure following the 2014 oil price collapse, Angola’s seismic acquisition activity is recovering. The combination of reformed fiscal terms under Presidential Decree 8/24, ANPG’s permanent offer licensing system, and the demonstrated prospectivity of the Kwanza Basin pre-salt play have collectively reignited operator interest in seismic evaluation of both proven and frontier areas.
This article tracks the seismic survey campaigns active and planned across Angola’s sedimentary basins, profiles the seismic contractors operating in the market, examines the technologies being deployed, and analyses the implications for exploration drilling decisions.
Active and Planned Seismic Campaigns
Shell Multi-Block Seismic Programme (2026-2027)
The most significant seismic acquisition programme in Angola is associated with Shell’s 17-block memorandum of understanding, signed in October 2025 with an estimated exploration commitment of approximately $1 billion. Shell’s programme is expected to include:
- 3D seismic acquisition across multiple blocks in the Kwanza Basin, Lower Congo Basin, and potentially the Namibe Basin
- 2D regional seismic lines in frontier areas to establish basin-scale geological framework
- Reprocessing of legacy seismic data from blocks with existing coverage that may benefit from modern processing algorithms
Shell’s seismic programme is expected to commence in earnest in 2026, with vessel mobilisation and permit acquisition underway. The programme’s scale makes it one of the largest seismic acquisition commitments in the West Africa region, reflecting Shell’s strategic intent to build a substantial exploration portfolio in Angola.
For details on Shell’s acreage position and broader strategic objectives, see our oil block concessions directory.
TotalEnergies Kwanza Basin Seismic Extension (2025-2026)
TotalEnergies continues to invest in seismic evaluation of the Kwanza Basin beyond the immediate Kaminho development area. The company’s programme includes:
- High-resolution 3D seismic over Block 20/11 and surrounding area to support Kaminho development drilling planning and identify follow-on exploration targets
- Extended 3D survey over adjacent exploration acreage to evaluate pre-salt prospectivity in the broader Kwanza Basin
TotalEnergies’ seismic data, combined with the geological information acquired during Kaminho appraisal and development drilling, will provide the most detailed subsurface characterisation of the Kwanza Basin pre-salt to date. This data will be critical for de-risking follow-on exploration wells and potential development FIDs.
For the Kaminho project details, see our deepwater field development pipeline article.
ANPG Multi-Client Seismic Programmes
ANPG has commissioned multi-client seismic programmes over blocks available under its permanent offer system. Multi-client surveys are funded by the seismic contractor (or by ANPG with cost recovery through data licensing fees) and made available to interested operators for a licensing fee, reducing the entry cost for companies evaluating new acreage.
Key multi-client programmes include:
- Lower Congo Basin reprocessing programme: Modern reprocessing of legacy 3D seismic data over relinquished blocks, using advanced algorithms (full waveform inversion, least-squares reverse time migration) to improve imaging of deep and complex structures.
- Namibe Basin regional 2D programme: Acquisition of regional 2D seismic lines across the under-explored Namibe Basin to establish the fundamental geological framework and attract exploration investment.
- Onshore Kwanza Basin survey: Acquisition of 2D and 3D seismic data over onshore blocks where geological mapping and seismic coverage are sparse.
Azule Energy Exploration Seismic (Block 17/06)
Azule Energy has acquired 3D seismic data over Block 17/06 in the Lower Congo Basin to support its exploration drilling programme. The survey provides detailed imaging of both proven Tertiary turbidite play types and deeper Cretaceous objectives that remain under-explored in this part of the basin.
Other Operator Programmes
Additional seismic programmes of varying scale are being conducted by:
- ExxonMobil: Focused 4D (time-lapse) seismic surveys over Block 15 to monitor waterflood sweep patterns and identify remaining oil targets for infill drilling
- Chevron: Selective seismic reprocessing in the Cabinda concession area to support mature-field optimisation
Seismic Contractors Operating in Angola
CGG
CGG (formerly Compagnie Generale de Geophysique) is one of the leading seismic contractors in the global market, with an established presence in West Africa. CGG provides both seismic acquisition (through its fleet of acquisition vessels) and seismic processing and imaging services.
CGG’s advanced imaging technologies, including full waveform inversion (FWI) and reverse time migration (RTM), are particularly relevant for Angola’s pre-salt exploration, where accurate imaging through complex salt bodies is critical for prospect de-risking.
PGS (Petroleum Geo-Services)
PGS operates a fleet of seismic acquisition vessels and has a strong multi-client data library covering West Africa. The company’s GeoStreamer broadband seismic technology, which records both pressure and particle velocity data, provides improved low-frequency and broad-bandwidth seismic images compared to conventional acquisition.
PGS has historically participated in multi-client surveys in Angola and may be involved in the current round of ANPG-sponsored multi-client programmes.
TGS
TGS specialises in multi-client seismic data and has an extensive data library covering Angola’s offshore basins. The company’s business model involves pre-funding seismic acquisition and selling data licences to operators, providing exploration companies with access to high-quality subsurface data without the full cost of proprietary acquisition.
TGS’s Angola data library includes reprocessed 2D and 3D datasets that benefit from modern processing technology applied to legacy raw data, potentially revealing subsurface features not visible in original processing.
Shearwater GeoServices
Shearwater GeoServices operates one of the largest seismic acquisition fleets globally, following its growth through vessel acquisitions from WesternGeco and Dolphin Geophysical. The company’s fleet includes high-capacity 3D acquisition vessels capable of operating in deepwater environments.
Polaris Seismic International
Polaris is a smaller seismic contractor that has been active in West Africa, including Angola. The company provides 2D and 3D acquisition services using vessels suited to both shallow-water and deepwater operations.
Seismic Technology: What Is Being Deployed
Broadband Seismic
Modern seismic acquisition in Angola overwhelmingly employs broadband technology, which extends the recorded frequency bandwidth of seismic data beyond the range achievable with conventional hydrophone streamers. Broadband data provides:
- Improved resolution for reservoir characterisation
- Better imaging of thin beds and stratigraphic traps
- Enhanced low-frequency content for deep imaging through salt
- Reduced acquisition and processing artifacts
Broadband acquisition technologies include multi-component (PZ) streamers (PGS GeoStreamer, CGG BroadSeis), variable-depth towing configurations, and advanced source designs that generate broader frequency content.
Full Waveform Inversion (FWI)
Full waveform inversion is an advanced seismic processing technique that iteratively matches synthetic seismic data generated from a velocity model with the observed field data, progressively refining the velocity model to provide a detailed image of subsurface structure and rock properties.
FWI is critical for pre-salt imaging in the Kwanza Basin, where the complex geometry of the salt body creates velocity anomalies that conventional processing methods cannot fully resolve. By producing more accurate velocity models, FWI enables better positioning of subsurface reflectors and more reliable interpretation of pre-salt structures.
4D (Time-Lapse) Seismic
4D seismic involves repeating 3D seismic surveys over producing fields at intervals (typically 2 to 5 years) to detect changes in the subsurface caused by fluid movement. By comparing sequential surveys, operators can:
- Map the extent of waterflood sweep
- Identify bypassed oil compartments
- Monitor gas cap expansion
- Track pressure changes in the reservoir
ExxonMobil and TotalEnergies have conducted 4D surveys over their mature Angolan fields, using the results to optimise infill drilling locations and injection strategies. See our offshore production technologies article for more on how seismic data integrates with digital oilfield workflows.
Ocean Bottom Node (OBN) Technology
Ocean bottom node seismic, which places autonomous recording devices on the seabed rather than towing streamer cables behind a vessel, provides superior imaging quality in complex geological settings. OBN technology enables:
- Full-azimuth recording for improved image quality in all directions
- Superior multiple attenuation (surface-related and interbed)
- Better near-surface imaging where streamer data is compromised by shallow obstructions
OBN surveys are more expensive than streamer surveys but deliver higher-quality data. Several operators are evaluating OBN acquisition for critical appraisal and development planning campaigns in Angola.
Implications for Exploration Drilling
Seismic data provides the foundation for exploration drilling decisions, but translating seismic images into drill-ready prospects requires extensive interpretation and risk assessment. The current seismic programmes in Angola are expected to generate exploration drilling activity as follows:
2026-2027: Shell commences exploration drilling based on initial seismic interpretation, targeting 2-4 wells. TotalEnergies may drill additional exploration wells in the Kwanza Basin to test satellite pre-salt prospects near Kaminho.
2028-2029: Results from initial Shell drilling inform a second phase of exploration. If successful, Shell could accelerate to 4-6 wells per year. ANPG permanent offer blocks with completed seismic coverage attract new operator commitments and initial exploration drilling.
Post-2030: Namibe Basin frontier exploration, contingent on encouraging seismic indicators, could lead to first exploration drilling in this previously untested province.
For drilling rig demand implications, see our deepwater drilling contractors analysis. For the investment context, refer to our overview of upstream investment opportunities.
Regulatory Framework for Seismic Acquisition
Seismic acquisition in Angola requires approval from ANPG and compliance with environmental regulations administered by the Ministry of Environment. Key regulatory requirements include:
- Environmental Impact Assessment (EIA): Required prior to any seismic acquisition campaign, addressing potential impacts on marine ecosystems, fisheries, and coastal communities. For the full regulatory context, see our regulatory compliance operations guide
- ANPG survey approval: Technical review and approval of the survey design, including acquisition parameters, timing, and area coverage
- Marine coordination: Coordination with the Angolan navy and port authorities for vessel movements and operational safety
- Data submission: Operators must submit all acquired seismic data to ANPG’s national data repository within specified timeframes
Conclusion
The 2025-2026 period represents a turning point for seismic exploration activity in Angola, with Shell’s multi-block programme, TotalEnergies’ ongoing Kwanza Basin evaluation, and ANPG’s multi-client initiatives collectively generating the most significant exploration data acquisition cycle in a decade. The resulting subsurface insights will shape drilling decisions, block awards, and investment commitments through the end of the decade and beyond.
For operators and service companies, the current seismic cycle represents both a direct market opportunity (acquisition, processing, interpretation services) and a leading indicator of future drilling and development demand that will sustain Angola’s upstream sector. Our energy sector career guide covers the geoscience roles central to this work.
External resources: ANPG Official Website | International Association of Geophysical Contractors | Society of Petroleum Engineers