By Brazil Stock Guide – Petrobras and Petróleos Mexicanos signed a memorandum of understanding that goes well beyond diplomatic symbolism. At its core, the deal is about a problem Mexico has struggled to solve for years: how to stabilize oil production, unlock deeper offshore reserves and rebuild parts of an energy system that still depends heavily on aging assets.
Petrobras (NYSE: PBR; B3: PETR3, PETR4) said the agreement signed Tuesday establishes a framework for strategic and technical cooperation with Pemex, Mexico’s state-owned oil company.
The memorandum covers potential joint evaluation, development and execution of projects across exploration and production, refining, petrochemicals, fertilizers, gas processing, emissions reduction and lower-carbon fuels. It is valid for two years and may be renewed.
The immediate focus is the Gulf of Mexico, particularly mature fields, seismic reprocessing and potential deepwater and ultra-deepwater opportunities. That is where Petrobras brings something Pemex does not have at the same scale: a proven operating model for complex offshore reservoirs.
Pemex remains a large producer, but not the producer it once was. In the first quarter of 2026, the company produced 1.652 million barrels per day of liquid hydrocarbons, according to its own figures. About 63% came from shallow-water fields, while the rest came from onshore assets. That is a meaningful base, but it also shows the constraint. Mexico’s production platform is still heavily tied to mature shallow-water fields, not to a deepwater machine comparable to Brazil’s pre-salt.
The decline is not a question of geology alone. The Mexican side of the Gulf of Mexico is widely seen as underdeveloped compared with the U.S. side. The issue is the ability to turn geology into barrels: seismic interpretation, reservoir modeling, deepwater drilling, subsea systems, project execution, financing discipline and long-cycle operational reliability.
That is where Petrobras can help. Over the past two decades, the Brazilian company built one of the world’s most advanced offshore toolkits, transforming the pre-salt from a geological promise into a production platform. Its experience in deep and ultra-deep waters, complex reservoirs, subsea engineering, FPSO integration and large-scale offshore development is precisely the type of capability Pemex needs if Mexico wants to move beyond incremental recovery from older fields.
Petrobras can also be useful before any giant discovery. Mature fields may offer faster gains than frontier exploration. Well interventions, reservoir management, seismic reprocessing and production optimization are less glamorous than a new deepwater discovery, but they can be valuable for a company trying to defend output while managing a heavy debt load and a large domestic refining agenda.
For Pemex, the logic is clear: it gets access to a partner that has already solved many of the offshore problems Mexico is now trying to confront. For Petrobras, the prize is optionality. The company gains a formal channel into one of Latin America’s most important oil provinces, access to technical conversations with the company that controls Mexico’s oil system and a possible path to replenish reserves beyond Brazil.
The presence of Pemex’s leadership in Brazil also matters. This is not just a courtesy visit. It gives Petrobras a chance to show its offshore operating model, understand where Pemex’s bottlenecks really are and build a relationship with the decision makers who will influence future access to projects, data, approvals and industrial partnerships in Mexico.
Petrobras Chief Executive Officer Magda Chambriard said the agreement could position the company as a strategic partner for Pemex as Mexico seeks to strengthen oil exploration and production.
“We are interested in exploration in the Gulf of Mexico, increasing production from mature fields and industrial processes in refining, petrochemicals and fertilizers,” Chambriard said in the statement.
There is also a petrochemical angle that investors should not ignore. Braskem Idesa, the Mexican petrochemical complex controlled by Braskem and Grupo Idesa, has spent years dealing with unstable ethane supply from Pemex. Petrobras is not a direct party to Braskem Idesa, and the asset is not formally included in the memorandum. But Petrobras is a major shareholder of Braskem, which makes the issue strategically relevant.
The Braskem Idesa complex in Veracruz was built around the Ethylene XXI project, one of the largest private industrial investments in Mexico. Its original economics depended on a long-term ethane supply contract with Pemex. The problem is that Pemex’s ethane availability has repeatedly fallen short of what the project needed.
The original supply framework contemplated 66,000 barrels per day of ethane. Later agreements reduced Pemex’s commitment and gave Braskem Idesa rights over additional ethane that Pemex did not use. Even so, the supply issue has not disappeared. In the first quarter of 2026, Braskem said Pemex supplied only 14,800 barrels per day of ethane to Braskem Idesa, down from 28,300 barrels per day a year earlier. The Mexican polyethylene plants operated at 55% utilization, and PE sales fell 37% from the previous quarter. The Mexico segment posted negative recurring EBITDA of $15 million.
That makes the Petrobras-Pemex industrial agenda more than a footnote. If Pemex can improve gas processing, liquids recovery and ethane availability over time, Braskem Idesa could benefit indirectly. Petrobras cannot magically solve Mexico’s ethane shortage. But it can bring technical knowledge in gas processing, refining integration, petrochemicals and industrial reliability — all areas covered by the cooperation framework.
For Petrobras, that creates a second possible gain. Beyond exploration optionality in the Gulf of Mexico, a better relationship with Pemex could help reduce friction around an asset linked to Braskem, one of Petrobras’s most important corporate exposures outside pure oil and gas. The Braskem Idesa issue is not the headline of the agreement, but it is part of the strategic background.
The caution is that the memorandum is not a deal to invest, acquire assets or form a joint venture. It does not create a binding capital commitment, company, consortium or project. Any opportunity identified under the framework will require separate negotiations, feasibility studies, regulatory approvals and internal governance clearance at both companies.