The search for and exploitation of hydrocarbons in the waters surrounding the Malvina Islands represents one of the most complex and strategic dimensions of the sovereignty dispute . The Sea Lion project , located north of the archipelago, is the flagship of this activity, led by British companies and, more recently, by an Israeli actor, with a history of alliances and divestments that reflect both the potential of the field and the challenges of developing it in a usurped and disputed territory.

In this case, the original concessionaire is Rockhopper Exploration PLC , a UK-based oil and gas exploration and production company founded in 2004 with the specific objective of exploring for hydrocarbons in the Malvina Islands. Its crowning achievement came in 2010 , when it announced the first significant oil discovery in the Malvina Islands, at León Marino in the northern Malvina Basin, 218 kilometers from the archipelago.

Following the discovery, Rockhopper, as the initial operator , conducted a successful appraisal and drilling campaign to determine the magnitude of the resource. The company, while possessing the technical expertise and the original license, needed a partner with greater financial capacity and experience in developing large-scale projects.

The Entrance of Premier Oil

In July 2012, Rockhopper announced an agreement with Premier Oil plc, under which Premier Oil plc acquired 60% of Rockhopper's interests in the North Malvinas Basin licences, including the Sea Lion project .

Premier Oil, a larger and more established British company, became the project operator . This partnership was intended to advance the development phase of the field, with Premier assuming a significant portion of the capital costs and providing financing . At the time, initial projections estimated an investment of $1.56 billion and "first oil" by 2020.

The collaboration between Rockhopper (with a 40% stake) and Premier Oil (with a 60% and operating stake) marked an intense phase of engineering and planning for the development of the field . However, technical challenges, the logistical complexity of the remote location, and oil price fluctuations, coupled with international lawsuits against oil companies and businesses driven by the government of Cristina Fernández de Kirchner , caused the project to face delays and cost re-evaluations.

The Formation of Harbour Energy

The landscape changed drastically In March 2021 , when Premier Oil merged with Chrysaor Holdings Limited to form Harbour Energy PLC . Harbour Energy thus emerged as the UK's largest independent oil and gas producer. However, shortly after its creation, in September 2021 , it announced a strategic re-evaluation of its asset portfolio.

The company's new management determined that the Sea Lion project did not fit into its long-term strategy , which was to focus on lower-risk opportunities closer to existing infrastructure and with an established production presence. As a result, Harbour Energy announced its intention to divest its interests in the Sea Lion project and other licenses in the Malvina Islands . This decision represented a significant setback for the project at the time, as a partner of Harbour's stature was withdrawing.

Navitas Petroleum's Entry: A New Boost for Sea Lion

Following Harbour Energy's decision, Rockhopper sought a new partner . This led to negotiations with Navitas Petroleum LP, an Israeli exploration and production company .

In December 2021, Rockhopper, Harbour, and Navitas signed a detailed agreement for Harbour's orderly exit and Navitas' entry . In April 2022, Navitas confirmed the acquisition of Harbour's 65% interest in the Malvinas licenses, assuming the role of operator of the Sea Lion project .

The transaction was completed in September 2022, following receipt of all necessary regulatory approvals from the illegitimate Malvina Islands Government and the United Kingdom.

Navitas Petroleum , with experience in large offshore developments and capital mobilization capabilities, has assumed responsibility for bringing the project to Final Investment Decision (FID). Since joining the project, Navitas and Rockhopper have worked to optimize the development plan for León Marino, seeking to reduce initial and life-of-field costs, while also seeking to secure the necessary financing . A phased approach has been envisaged, initially utilizing a repurposed floating production, storage, and offloading (FPSO) unit, with plans for a larger FPSO in subsequent phases.

Current State and Future Perspectives

As of mid-2025, the León Marino project continues to advance toward its final phase, although it has faced some delays in financing. Navitas has secured its partnership with international banks for project financing, estimated at approximately $1.4 billion for the first phase .

The most recent technical reports, such as those from Netherland Sewell & Associates (NSAI), continue to confirm significant resources in the field, with estimates exceeding 300 million barrels of recoverable oil in the initial phases alone.

The goal is to achieve peak production of around 55,000 barrels of oil per day in the initial phases, with the potential to increase to 80,000 b/d with a larger FPSO in the future. Supporting infrastructure, such as the planned new multimodal port in Stanley Bay , is crucial to the logistics of such remote operations, consolidating Britain's ability to project power and exploit resources in the region.

The Usurpation of Argentine Resources

For Argentina, the activities of companies such as Rockhopper, Premier Oil, Harbour Energy, and Navitas in the waters of the Malvinas, under British law, constitute a flagrant encroachment on its natural resources . The exploitation of these oil fields not only represents a direct economic loss for the country in the amount of billions of dollars, but also undermines its sovereignty and control over its continental shelf.

Thus, although Argentina's protest is constant and based on international law and UN resolutions that urge the negotiation of sovereignty and not the unilateral exploitation of disputed resources, the political, administrative, and legal trick used by the Tierra del Fuego government, led by Governor Gustavo Melella, to allow a company like Harbour Energy, which between 2021 and 2022 was the majority shareholder in the illegitimate exploration of the León Marino deposit, is unprecedented. Even more so when it generates an unequivocal breach—due to its contradiction—of Argentina's claim to sovereignty over the Malvina Islands, the Southwest Atlantic, and the corresponding maritime territories of the South American nation .