Nigerian billionaire Arthur Eze loses another license as South Sudan strips Oranto Petroleum of Block B3 for failing to drill or pay

South Sudan has declined to renew Oranto Petroleum's exploration licence for Block B3, citing the Nigerian company's failure to conduct seismic surveys, drill as committed or meet its financial obligations to the government, the South Sudan Ministry of Petroleum announced on April 30.

The decision strips Arthur Eze's Oranto Petroleum of a 24,000-square-kilometre block it secured in 2017 with a pledge to invest $500 million in exploration and development. That commitment was never honoured in any meaningful way. Nine years after securing one of the largest undeveloped blocks in a country sitting on proven reserves estimated in the billions of barrels, Oranto had not drilled a single exploration well.

"The Ministry has conducted a comprehensive assessment of Oranto's obligations under the agreement," the ministry said, finding that the company failed to meet key work program requirements including seismic acquisition and drilling commitments, failed to fulfill financial obligations and failed to deliver on other project-related commitments outlined in the production sharing agreement.

Block B3 is now open for new applications. The ministry said it is specifically seeking companies committed to timely execution, regulatory compliance and long-term partnership.

The fourth loss in 18 months

The South Sudan revocation is the fourth significant licence loss Eze's operations have absorbed in approximately 18 months, and each one follows the same pattern.

In September 2025, Senegal's government under reform President Bassirou Diomaye Faye revoked the Cayar Offshore Shallow exploration licence that Oranto had held since 2008. Seventeen years of holding that block produced no exploration wells and repeated failures to provide the bank guarantees that the licence required. The new Dakar government had no patience for an arrangement that had delivered nothing to the country across nearly 2 decades.

In 2024, Equatorial Guinea revoked 2 Atlas Oranto exploration licences after finding the company in violation of its production sharing agreement terms. In February 2026, a payment dispute between Atlas Petroleum and Chevron over Block I, which contains the Aseng field, resulted in Atlas losing its entire 27% stake in that block. The government's state oil company GEPetrol absorbed the stake.

The losses are now accumulating in a pattern that African petroleum ministries are beginning to reference in discussions about Eze's operations. Senegal acted first. Equatorial Guinea followed. South Sudan has now joined that list.

What Eze promised in 2017

When Oranto secured Block B3 in 2017, the announcement was framed as a landmark moment for African indigenous oil. Eze was positioning himself as the first African independent to make a serious commitment to South Sudan's unexplored territories, entering a sector where Chinese state-backed companies including CNPC and Sinopec had historically held the dominant positions.

The $500 million pledge was specific and large. The block itself had genuine geological promise. Early assessments pointed to promising subsurface characteristics and the kind of long-term upside that made the commitment credible on paper. South Sudan's government, still rebuilding after the civil war that had devastated its oil infrastructure from 2013 onward, welcomed a committed African partner.

The operating environment in South Sudan is genuinely difficult. Security remains fragile across much of the country. Infrastructure is limited. Export pipelines run through Sudan, adding political risk to logistical complexity. Those challenges are real, and any fair assessment of why exploration has not happened in Block B3 would acknowledge them.

They are not, however, unique to Oranto. Other companies have operated in challenging African environments while still drilling. Tullow Oil, TOTAL, ExxonMobil and others have worked in difficult frontier basins across the continent and met their work programme commitments. The question the South Sudanese government appears to have concluded is not whether Block B3 is hard to explore, but whether Oranto ever genuinely intended to explore it.

The Atlas Oranto model and its limits

As Billionaires.Africa has documented, Arthur Eze built his portfolio through a model that relies on political access to secure licences at preferential terms, followed by a period of holding the acreage while seeking a buyer willing to pay multiples of the original acquisition cost. The most celebrated example of that approach was the 2010 Liberia episode, in which Oranto acquired 3 offshore blocks at $200,000 each and sold them to Chevron in the same calendar year for a reported sum exceeding $250 million, without drilling a single well.

That model has generated significant wealth for Eze over 30 years of African oil deals. It has also consistently failed to generate the drilling, the production and the economic development that the governments granting the licences were expecting.

The model's vulnerability has always been political continuity. It works when governments stay accommodating and when the relationships that secured the original licence survive political transitions. In Senegal, a reform government arrived and revoked a block that had been quietly held for 17 years. In South Sudan, a comprehensive assessment of what was and was not delivered over 9 years produced the same conclusion.

Eze is 77 years old and still active, still signing deals and still defending licences. In April 2025 he made 2 separate trips to Equatorial Guinea to try to recover his revoked blocks. Earlier in 2026, Oranto sold 75% of its Block 3 stake in Sao Tome and Principe to Petrobras, in the kind of farm-down transaction the model is built around. He remains in business across multiple jurisdictions.

But the arc of the past 18 months tells a story of governments catching up to a business model that African policymakers increasingly understand and increasingly reject. The blocks are going back to the market. South Sudan says it wants companies committed to timely execution. That is a precise and deliberate description of what it did not get from Oranto.