TGS Launches Seismic Survey to Unlock Angola's Deepwater Frontier

By James Walker

OSLO, Norway – February 11, 2026 – Global energy data firm TGS has commenced a major new seismic survey offshore Angola, signaling a renewed push into one of West Africa’s most promising, yet challenging, exploration frontiers. The project, named “Ultra Profundo,” will cover approximately 12,600 line kilometers of the nation's ultra-deepwater basins, a region that has not seen new multi-client 2D data acquisition since 2015.

The Ramform Victory vessel began operations earlier in the first quarter, embarking on a 100-day mission to gather modern, long-offset seismic data. This initiative is poised to provide a critical first look into a vast, underexplored area, potentially paving the way for a new wave of multi-billion-dollar investment in Angola’s petroleum sector.

Angola's Renewed Oil Ambitions

The timing of the TGS survey is no coincidence. It arrives as Angola, Sub-Saharan Africa's second-largest oil producer, strategically repositions itself on the global energy stage. After peaking at nearly 2 million barrels per day (bpd) in 2008, the country’s production has seen a steady decline, recently hovering around 1.03 million bpd. This decline, coupled with a desire for greater strategic control, prompted Angola to exit OPEC in December 2023, freeing it from the cartel's production quotas.

Now, the Angolan government and its National Oil, Gas and Biofuels Agency (ANPG) are focused on an ambitious goal: stabilizing production above the 1 million bpd mark and attracting significant new investment. The ANPG has been aggressively promoting exploration through a multi-year licensing strategy, with plans to award dozens of concessions by 2025 and launch a new tender for blocks in the Kwanza and Benguela Basins. This regulatory push is designed to reverse production declines by opening up new acreage and encouraging operators to explore high-risk, high-reward plays that have been overlooked for nearly a decade. The “Ultra Profundo” survey provides the foundational data needed to make these new blocks attractive to international oil companies.

The Geological Holy Grail: Targeting Pre-Salt Riches

At the heart of this renewed interest lies the immense potential of Angola's pre-salt reservoirs. These geological formations, found miles beneath the seabed and buried under thick, complex layers of salt, are notoriously difficult to explore but can hold colossal quantities of high-quality light crude oil. The geological cousin of Brazil’s prolific Santos and Campos basins, Angola’s deepwater margin shares the same pre-salt potential that led to Brazil’s transformative oil boom.

The salt layers themselves present the primary challenge. They act like a distorted lens, scattering and absorbing seismic energy, which makes imaging the rock structures beneath them incredibly difficult. Without a clear picture of the underlying geology, drilling an exploration well is an extraordinarily risky gamble, often costing hundreds of millions of dollars with a high chance of failure. This technical barrier is precisely why modern, advanced seismic technology is not just an advantage but a necessity.

Previous discoveries in Angola, such as the Cameia and Azul fields in the Kwanza Basin, have already confirmed the existence of this valuable pre-salt play. However, large swaths of the ultra-deepwater territory remain virtually unmapped with modern technology, representing a true frontier where the next giant discovery could be waiting. TGS is betting that its new data will be the key to unlocking it.

Advanced Technology as the Key

The “Ultra Profundo” survey is designed specifically to overcome the imaging challenges of the pre-salt. By using modern 2D seismic acquisition with a “long-offset” configuration—where the distance between the seismic source and the receivers is exceptionally long—the equipment can capture energy that has traveled deeper and at wider angles. This technique provides the crucial data needed for advanced processing algorithms to build a clearer, more reliable picture of the sub-salt geology.

This high-quality data is essential for de-risking exploration. It allows geoscientists to more accurately identify potential hydrocarbon traps, map complex fault systems, and understand the basin floor channel systems that act as conduits for oil and gas. For oil companies evaluating whether to bid on new blocks or commit to a drilling campaign, this level of insight can be the deciding factor.

Kristian Johansen, CEO of TGS, highlighted the strategic importance of the project. “Angola’s ultra deepwater margin represents one of the most exciting frontier exploration opportunities in West Africa,” he commented. “Our Ultra Profundo multi-client 2D program delivers high-quality seismic coverage needed to unlock pre-salt and sub-salt potential. By leveraging TGS’ acquisition and imaging capabilities, we will provide high-quality data supporting future exploration activities.”

A High-Stakes Play for Industry Giants

The primary customers for this new dataset will be the supermajors and other large independents already active in Angola. Companies like TotalEnergies, operator of the prolific Block 17; Chevron, which recently signed contracts for ultra-deepwater Blocks 49 and 50; and other key players such as ExxonMobil, BP, and Eni (through the Azule Energy joint venture) are all potential subscribers. For these operators, having access to the first modern regional data in years is a significant competitive advantage.

Chevron's recent acquisition of new blocks, which includes a commitment to conduct its own seismic surveys, underscores the industry's readiness to invest in new data for the region. The TGS multi-client model offers a cost-effective solution, allowing multiple companies to license the same high-quality dataset, thereby sharing the cost of initial exploration and accelerating regional understanding.

The initial fast-track data from the “Ultra Profundo” survey is scheduled to be available to clients in the third quarter of 2026, offering an early glimpse into the region’s potential. The fully processed dataset, which will provide the most detailed imaging, is expected in the second quarter of 2027. The release of this data will be a closely watched event, as its findings could shape the next decade of exploration and investment in Angola’s deepwater and redefine the energy landscape of West Africa.