Angola/Sao Tome and Principe: Let's Talk

What happened: Angolan President Joao Lourenço accredited Alda Ramos as the new ambassador to Angola after the post had been vacant for three years amid strained relations under former Prime Minister Patrice Trovoada.

Why it matters: The rapprochement will help improve the diesel-powered archipelago’s ability to address electricity shortages. STP authorities may also seek technical and capacity-building support from Angola in the oil sector.

What happens next: The outcome of the 2026 elections and unresolved disputes pose risks to bilateral ties.

On 17 April, Angolan President Joao Lourenço accredited Alda Ramos (see Featured Personality) as STP’s new ambassador to Angola after three years without anyone in post. This follows visits from Prime Minister Americo Ramos in February 2026 and President Carlos Vila Nova a few months prior.

The ambassadorship has been vacant since 2023, when bilateral ties were severely strained following an STP Constitutional Court ruling that favored Santomean politically influential actors who backed former Prime Minister Trovoada over an Angolan investor. An Angolan official called this “the high point in the disturbance in bilateral relations”.

Ramos was the first of a handful of names that Lourenço accepted; he had previously rejected all of Trovoada’s proposals. We understand that Angolan First Lady Ana Dias Lourenço personally greenlit her accreditation, likely due to her background in women's rights and promotion of emancipation, causes dear to Ana Dias.

STP Energy Security

Reengaging with Angola could be significant for STP’s energy security. STP has a large public debt to Angola, and the state power utility EMAE has accumulated substantial payment arrears to Sonangol, which provides the bulk of the country’s fuel. In 2022, Sonangol reduced fuel exports to STP due to arrears and later demanded cash payment for deliveries, which contributed to power shortages.

That reduction, along with the August 2025 termination of a diesel power plant concession contract with Turkey’s TeslaSTP, has further strained STP’s energy supply, leading to severe disruptions. Power shortages have led to roadblocks and protests, as the government has failed to deploy new generators.

Additionally, with elections looming this summer, the administration is under pressure to stabilize energy security, likely hoping that improved relations with Angola will lead to a settlement of payment arrears.

Quid Pro Quo

In addition to unstable energy security, STP has a shortage of human resources and experience for navigating the oil sector, particularly the regulatory and contract environment. Because the country’s oil sector has traditionally been aligned with the prime minister’s office — the regulator, the ANP, is more on the technical side of policy — the Santomean government is likely hoping that rekindling ties at the diplomatic level will easily translate into cooperation on hydrocarbons.

Angola has been generous in intelligence sharing with other emerging producers, such as Namibia; its regulator/NOC structure is widely praised as the most efficient and investor-friendly in sub-Saharan Africa. STP is likely to seek advice and insight from the Angolan regulator, ANPG.

Additionally, Angola’s National Petroleum Oil Institute is seeking to expand its role as a major provider of training and capacity-building for public and private-sector professionals in the region. Deeper ties will mean more training provision, building on a 2022 MoU between the ANP and the ANPG to train staff in areas like geosciences, the economy, local content, regulations, hygiene, security and environment.

For Luanda, stronger ties could enhance Angolan influence in STP’s upstream environment, competing with Nigerian players for capital and access. Those include Oando, run by President Bola Ahmed Tinubu’s nephew, Wale Tinubu, and Oranto, which recently agreed to sell a stake in a STP block to Petrobras.

Sonangol has an established network of contacts after years of supplying EMAE and training Santomean oil sector professionals, and it holds stakes in two offshore blocks, STP. The company, alongside other well-positioned Angolan players such as Etu Energias, may see better bilateral relations as an opportunity to expand regionally — debt relief talks can open the way.

Looking Ahead

Although the recent diplomatic visits and Ramos’ confirmation are positive, the Constitutional Court's ruling remains a lingering threat to bilateral ties. STP’s upcoming elections are another risk, as foreign policy direction could change under a new government, though closer ties with Angola are largely consensual.

Additionally, if STP manages to strike medium or long-term deals with other fuel suppliers — though its financial struggles and lack of credibility will make that very difficult — this would reduce its dependency on Angola and thus the incentive to foster stronger ties.

Bilateral engagement will be worth monitoring going forward: A personal meeting between the respective oil ministers would be a positive development. Investors should also closely monitor the ambassador’s initial interactions with government and state officials to gauge their priorities after relaunching ties.

An MoU could be a potential next step: The ANPG has been active in signing MoUs with partners from countries with which Angola has close ties. For example, the agency’s MoU with Mozambique included sharing expertise in concession management, technical studies and human resources development. A similar MoU in STP would signal improvements in oil sector engagement beyond the short term.