Mexico Oil

The producer whose three-decade decline has reshaped North American heavy crude trade — and whose energy nationalism continues to constrain reform

The United Mexican States is one of the larger oil producers in the Western Hemisphere, with crude and condensate output typically around 1.5 to 1.7 million barrels per day in recent years. This production level, however, represents a long and continuous decline from a peak above 3.5 million barrels per day in 2004. The Mexican production trajectory has been one of the most consequential supply stories of the past two decades — an example of how institutional, political, and geological factors can converge to produce sustained decline in a country with substantial underlying resources.

Understanding Mexican oil requires understanding Pemex (the state oil monopoly that dominates the industry), the Cantarell production collapse that defined the initial decline, the broader institutional and policy environment that has constrained recovery, and the energy nationalism of the AMLO and Sheinbaum administrations that has reversed earlier reform efforts.

Pemex

Petróleos Mexicanos (Pemex) is the Mexican state oil company and the dominant operator of Mexican upstream, midstream, and downstream operations. Established in 1938 through the nationalization of foreign oil concessions — an event commemorated annually as Día de la Expropiación Petrolera — Pemex has been the centerpiece of Mexican economic nationalism for nearly nine decades.

The company's structural challenges have become increasingly severe over the past two decades:

Financial distress. Pemex carries one of the largest debt loads of any oil company globally, currently exceeding $100 billion. The debt load has been a chronic constraint on operational and capital investment, with debt service requirements absorbing cash that would otherwise flow to upstream operations.

Operational deterioration. Pemex production has declined steadily for two decades, and the company's refining, midstream, and other operations have also struggled with safety incidents, equipment failures, and capacity underutilization.

Political instrumentalization. The company has been used as a vehicle for various political objectives — subsidized domestic fuel pricing, social programs, employment policies — that have diverted resources from operational and capital priorities.

Workforce structure. The Pemex workforce structure, governed by a long-standing collective bargaining agreement with the petroleum workers' union, has been characterized by some observers as one of the more challenging features of the company's operating environment.

The Mexican federal government has repeatedly intervened to support Pemex financially, with capital injections, tax relief, and debt restructuring at multiple points. The combination has kept Pemex operational but has not addressed the underlying structural issues.

The Cantarell Collapse

The central event in Mexico's two-decade production decline has been the collapse of the Cantarell offshore field. Cantarell, located in the Bay of Campeche, was for decades one of the most prolific oil fields in the world, with production peaking at 2.1 million barrels per day in 2004 — over half of total Mexican output at the time.

The decline that began in 2005 was steeper and faster than initially projected. Within a decade, Cantarell production had fallen below 200,000 barrels per day, and current production is a small fraction of that. The decline reflected several factors:

The Cantarell decline is the single largest negative contributor to the Mexican production trajectory of the past two decades and is one of the most-studied examples of accelerated decline in a giant offshore field globally. The episode has been a recurring reference in discussions of mature field management and the importance of continued investment in declining assets.

The Ku-Maloob-Zaap Era

As Cantarell declined, the Ku-Maloob-Zaap (KMZ) complex emerged as the new dominant Mexican producing asset. KMZ peaked at approximately 850,000 barrels per day in the mid-2010s and has subsequently entered its own decline phase. The complex remains the single largest Mexican producing field but cannot independently sustain national production at historic levels.

Other significant Mexican producing fields include:

The fragmentation of production across many smaller fields, rather than concentration in giant fields like Cantarell, represents a structural shift in the Mexican production base that requires different operating capabilities than the Cantarell-era operating model.

The Maya Export Grade

Mexican Maya is the country's principal export grade and one of the most commercially important heavy sour crudes globally. The grade is covered in detail on our Maya page. Key features include:

Maya export volumes have declined substantially from peak levels above 1.5 million barrels per day to typically below 500,000 barrels per day in recent years, reflecting both reduced upstream production and increased domestic refining intake.

The 2013 Energy Reform

The Peña Nieto administration's 2013-2014 energy reform represented one of the most ambitious efforts to address Mexican oil's structural problems. The reform allowed for the first time in nearly eighty years competitive licensing of Mexican upstream acreage to private and international companies. Several rounds of licensing rounds awarded significant blocks to international majors and independents, with substantial expectations for new investment and production growth.

The reform's results were mixed. New operators including ExxonMobil, Chevron, BP, BHP, Eni, TotalEnergies, Shell, Equinor, Hokchi Energy, Renaissance, and others won blocks and committed to substantial investment programs. Several discoveries were announced. But the political environment shifted before the reform could produce meaningful production impact.

The AMLO and Sheinbaum Administrations

The 2018 election of Andrés Manuel López Obrador (AMLO) and the continuation of his political coalition under Claudia Sheinbaum (elected 2024) have reshaped Mexican energy policy in directions that have substantially reversed the 2013 reform trajectory. Key elements of the AMLO-Sheinbaum energy approach include:

The approach has been controversial in domestic and international policy debates. Supporters argue it represents necessary correction to insufficient state control over strategic resources; critics argue it forgoes substantial investment and production growth that private operators would have generated.

Refining and Domestic Market

Mexico operates six Pemex refineries (Tula, Salamanca, Cadereyta, Madero, Minatitlán, Salina Cruz) plus the new Dos Bocas (Olmeca) Refinery commissioned in stages from 2022-2024. Combined nameplate refining capacity is approximately 1.9 million barrels per day, but operational throughput has been chronically below capacity due to operational difficulties, scheduled maintenance, and unplanned outages.

Mexico remains a net importer of refined products despite the substantial refining capacity, with imports of approximately 700,000-900,000 barrels per day of finished products principally from U.S. Gulf Coast refineries. The fuel self-sufficiency objective requires both substantial throughput improvement at existing refineries and continued ramp-up of Dos Bocas operations.

What Drives Mexican Oil Output

KMZ field decline rates. The principal short-term variable as the dominant producing complex matures.

Pemex investment capacity. Capital available for upstream development across the field portfolio.

New project commissioning. Quesqui ramp-up and other newer development production levels.

Private operator activity. Production from the limited set of privately-operated blocks awarded under the 2013 reform.

Dos Bocas throughput. Refining intake reduces export availability.

Mexican fiscal pressures. Government budget needs affect Pemex tax extraction and investment capacity.

U.S. Gulf heavy refining margins. Strong margins support Maya prices and Pemex revenue.

Mexico Oil in One Sentence

Mexico is the producer whose three-decade decline from over 3.5 million to under 1.7 million barrels per day has reshaped North American heavy crude trade — defined by Pemex's structural challenges, the Cantarell collapse, and an energy nationalism trajectory that has reversed earlier liberalization efforts while constructing the Dos Bocas refinery as a symbol of state-controlled energy ambition.

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