PEMEX, Petrobras Sign Two-Year MoU

PEMEX and Petrobras have signed a two-year technical cooperation agreement to explore joint projects in refining, mature field revitalization, and deepwater extraction in the Gulf of Mexico. This state-to-state alliance aims to bridge PEMEX’s critical deficit in deepwater drilling technology by leveraging Petrobras’s extensive pre-salt operational expertise, particularly to combat steep reservoir depletion in mature assets like the Cantarell field. While the non-binding agreement offers PEMEX a vital technical partner amid severe capital expenditure cuts and recurring domestic refinery incidents, any physical drilling operations or capital deployment remain deferred to future feasibility reviews and formal contract approvals.

Petrobras and PEMEX have signed a two-year Memorandum of Understanding to pursue strategic and technical cooperation across the oil and gas sector. The agreement was signed in Rio de Janeiro by PEMEX Director General Juan Carlos Carpio and Petrobras Executive President Magda Chambriard, in an act that formalizes months of presidential-level diplomatic engagement between the two countries into a structured technical framework.

The memorandum includes the joint evaluation, development and execution of projects in exploration and production and industrial processes, as well as cooperation on regulatory and institutional aspects of the sector. The companies will also explore collaboration in refining, petrochemicals, fertilizers, gas processing, energy efficiency and lower-carbon-intensity fuels, including carbon capture and emissions reduction initiatives.

President Luiz Inácio Lula da Silva revealed in March 2026 that he proposed this partnership to Mexican President Claudia Sheinbaum following discussions with Chambriard. Sheinbaum confirmed the deal days before its signing, noting that Petrobras' experience in deepwater exploration and in reaching reserves at greater depths makes it a natural partner for PEMEX's ambitions in the Sonda de Campeche and the broader Gulf of Mexico.

The alliance signals a new paradigm where technological expertise becomes the primary catalyst for international energy partnerships, particularly in challenging deepwater environments where operational complexity demands sophisticated technical solutions. For an administration that has simultaneously restricted private sector participation in upstream oil operations while acknowledging that PEMEX cannot develop its deepwater resources alone, partnering with a fellow state-owned company from a politically aligned country offers a path around that contradiction.

What Each Side Brings

PEMEX has no deep-water drilling experience and cannot afford the exploration needed to replace falling reserves. PEMEX's liquids production stabilized at approximately 1.65MMb/d in 1Q26, less than half its 3.4MMb/d peak in 2004, and Moody's has explicitly flagged that this stabilization reflects execution improvements rather than a structural reversal of decline, with underlying depletion rates running in the low 20% range.

Petrobras brings precisely the capabilities PEMEX lacks. Brazil's NOC brings decades of ultra-deepwater expertise developed through pre-salt field operations, while Mexico offers extensive Gulf of Mexico acreage with significant untapped potential. Petrobras's pre-salt fields off the Brazilian coast operate at water depths ranging from 1,500m to 3,000m and have transformed Brazil into one of the world's largest oil producers, the same geological and technical challenge that Mexico's deepwater acreage presents, and that PEMEX has been unable to address alone after decades of underinvestment in subsea technology and engineering.

The partnership also includes potential collaboration with Brazil's BNDES development bank and miner Vale on critical minerals development.

Under the agreement, the companies will evaluate initiatives aimed at the revitalization of mature fields, seismic reprocessing and exploratory and development opportunities in deepwater and ultra-deepwater areas, including assets located in the Gulf of Mexico.

The Campeche Sound, Mexico's dominant offshore production basin, home to the Cantarell and Ku-Maloob-Zaap fields that together account for the bulk of remaining Mexican crude output, is the immediate focus. Cantarell once produced more than 2 million barrels per day and is now a fraction of that, but still holds significant remaining reserves that advanced reservoir management and seismic reprocessing could help identify and develop.

The deal centers on fields like Cantarell, once the crown jewel of Mexican oil production and now a symbol of the country's long-running energy decline. The field still holds significant reserves, but extracting them requires technology and expertise that PEMEX has struggled to develop on its own.

The Legal Caution Built Into the Document

The MoU is nonbinding and does not create a formal partnership or investment commitment, signaling Petrobras's intent to leverage its offshore know-how, broaden regional industrial ties and potentially open future projects subject to feasibility reviews and corporate approvals. The memorandum is valid for two years and may be renewed. Any opportunities identified will be subject to future negotiations, feasibility analyses and approvals by the parties' respective governing bodies.

Chambriard said the partnership could reach beyond the Gulf, even into Africa, a framing that positions the MoU as the opening of a broad strategic alliance rather than a project-specific technical agreement. The contrast with the legal text's careful non-binding language reflects the standard gap between political momentum and commercial execution in state-to-state energy agreements of this kind.

The MoU Against PEMEX's Immediate Challenges

For PEMEX, the MoU with Petrobras is an institutional signal at a moment when the company's operational credibility is under sustained pressure. The Gulf of Mexico spill from February is still under investigation. The Salina Cruz refinery has experienced two fuel oil leaks within a month and a fire. PEMEX's capital expenditure fell 51% in real terms in early 2026. CICSA's exit from the Mistle-1EXP drilling platform tender ,which PEMEX subsequently cancelled, illustrated the difficulty of attracting even historically aligned domestic partners to complex offshore commitments.

Against that backdrop, a signed MoU with one of the world's most technically capable deepwater operators, backed by presidential endorsement from both Sheinbaum and Lula, offers something PEMEX has lacked in its upstream exploration program: a credible institutional partner with the technical depth to develop what PEMEX holds on paper but cannot access alone. Whether the MoU translates into binding contracts, joint drilling operations, and ultimately barrels produced in the Gulf of Mexico will be determined over the two-year term the parties have given themselves to find out.