Oil tankers rarely sit at the centre of geopolitical escalation. Yet this month in the Caribbean, the interception and seizure of vessels carrying Venezuelan crude have pushed energy back into the foreground of the long-running standoff between Washington and Caracas.

US naval forces moved to intercept tankers accused of transporting sanctioned Venezuelan oil, including so-called “ghost tankers” operating under opaque ownership structures and, in some cases, foreign flags. The actions marked a shift from passive enforcement to visible maritime pressure, triggering immediate disruptions in Venezuela’s already fragile export system.

Publicly, the United States continues to frame its policy toward Venezuela around democratic norms, sanctions compliance, and allegations related to narcotics trafficking. But political rhetoric has done little to quiet speculation that oil remains the unspoken driver. President Donald Trump, in recent remarks, accused Venezuela of taking “all of our oil” and stated bluntly, “We want it back.” Brazilian President Luiz Inacio Lula da Silva, offering to mediate, was more circumspect, noting that he was unsure whether Washington’s interest was “only in Venezuela’s oil.”

The truth lies somewhere in between. Oil may not be the headline justification for US pressure, but it remains the subtext shaping outcomes.

Venezuela holds the world’s largest proven oil reserves, exceeding even Saudi Arabia. Yet the country functions today like an energy-poor state. Production has collapsed, infrastructure has decayed, and oil revenues leak through sanctions-driven inefficiencies, intermediaries, and black-market channels.

This contradiction vast geological wealth paired with economic scarcity defines Venezuela’s modern political economy. It also explains why oil continues to anchor Washington’s Venezuela policy even as official narratives emphasise governance and legality.

Most Venezuelan crude is heavy or extra-heavy, concentrated in the Orinoco Belt. Unlike light shale oil, this crude requires diluents to flow and specialised refineries to process. Many such refineries were built decades ago along the US Gulf Coast specifically to handle Venezuelan barrels.

This matters because oil markets are not interchangeable. A Venezuelan barrel cannot easily be replaced by Saudi or US shale crude. Heavy crude remains structurally scarce, and refineries configured for it face high switching costs. This technical reality has long underpinned Venezuela’s strategic relevance to the US energy system.

US companies began producing Venezuelan oil in the 1920s, and for decades Caracas was a stable supplier. Until the mid-2000s, Venezuela routinely shipped tens of millions of barrels a month to the US.

That relationship deteriorated after Hugo Chávez accelerated nationalisation in 2007, seizing foreign assets and recasting oil as a political weapon. Investment dried up, trust eroded, and technical capacity weakened. When Nicolás Maduro succeeded Chávez, he inherited a hollowed-out oil state.

PDVSA’s slow collapse

The decline of PDVSA was not sudden. Years of under-investment, politicised management, corruption allegations, workforce attrition, and operational accidents steadily eroded output. Production fell from over three million barrels per day in the early 2000s to under one million barrels per day by the early 2020s, based on secondary estimates from OPEC.

US sanctions imposed from 2017 onward did not cause the collapse, but they locked it in place. Critically, sanctions cut off access to US-supplied diluents, making it even harder for Venezuela to process and export its heavy crude, as documented in reporting by Reuters and the US Energy Information Administration.

Sanctions reroute oil, they don’t stop it

Despite sanctions, Venezuelan oil continues to flow—just less transparently. Exports are estimated at roughly 500,000 barrels per day, primarily to Asian buyers, routed through intermediaries and discounted pricing structures. The result is fewer dollars for the state, greater opacity, and higher transaction costs.

This is the central paradox of sanctions: transparency collapses faster than volumes.

The Chevron exception

Amid broad restrictions, one narrow channel remained open. Chevron was granted a limited US Treasury licence in late 2022, allowing it to produce and export Venezuelan oil, mainly to the US, while preventing direct cash payments to the Maduro government.

For Washington, the arrangement preserved leverage, stabilised some production, and kept a portion of Venezuelan exports within a legal and observable framework. By late 2023, Chevron was exporting an estimated 150,000–200,000 barrels per day, according to sector sources cited by Reuters.

Why tanker seizures matter now

That fragile equilibrium shifted when US authorities escalated enforcement. The boarding and seizure of tankers had an immediate chilling effect. Shipping firms pulled back, vessels idled offshore, and exports fell sharply within weeks, according to tanker-tracking data reviewed by Reuters.

For PDVSA, this is existential. Storage capacity is limited. Prolonged export disruptions force production shut-ins, compounding revenue losses in an economy already starved of foreign currency.