A New Study Explains Why Guyana Strikes Oil and Suriname Struggles
Energy
Key Facts
—The finding. A new study links the Guyana Suriname oil divide to a difference in the Earth’s crust.
—The winner. Guyana’s “Golden Lane” has yielded more than 54 discoveries since 2015.
—The reason. Guyana sits on older rifted crust; Suriname sits on a thick volcanic plateau.
—The effect. Extra heat under Suriname pushes some prospects from oil toward gas.
—The stakes. The work maps where oil is likely and where drillers may find gas instead.
A new academic study offers the clearest answer yet to a question worth billions: why the Guyana Suriname oil boom has been so lopsided in Guyana’s favour.
Since the Liza discovery in 2015, Guyana’s central oil corridor has delivered dozens of finds. Just across the maritime border, Suriname’s results have been far patchier.
For a foreign investor, the study matters because it turns luck into geology. It suggests where the next barrels are likely to be, and where drillers risk finding gas instead of oil.
To understand why this matters so much, it helps to know what geologists mean by an “oil window.” This is the underground depth and temperature range where organic material cooks into liquid crude oil. If the heat is too low, the rock stays immature.
If it is too high, the oil cracks further into natural gas. The study essentially maps where that sweet spot sits on each side of the border.
What the Guyana Suriname oil study found
The research comes from a university team studying the basin. It focuses on the deep structure of the Earth’s crust beneath the two countries’ waters.
The contrast is fundamental. Guyana’s Golden Lane sits over older, non-volcanic crust about twenty-three kilometres thick, formed by a slanting continental split.
Suriname’s margin is different. It lies over a thicker volcanic plateau, a seaward-jutting slab of rock around twenty-five kilometres thick with its own heat signature.
That difference straddles the border. The change in crust roughly follows the maritime line between the two nations, shaping how oil formed on each side.
For readers unfamiliar with deepwater exploration, a “rifted” margin like Guyana’s forms when a continent stretches and breaks apart, creating a thinner, cooler floor. A volcanic plateau, by contrast, is built from massive outpourings of lava, and it retains more residual heat.
That heat is what tips the chemical scales.
Why the Guyana Suriname oil divide happens
Heat is the key variable. Deeper burial and higher thermal stress on parts of the Suriname side push the underground fluids past oil toward gas and condensate.
The oil window is narrower there. The study finds the prime oil-generating zone extends only a limited distance north and east of Guyana’s Golden Lane.
That fits the drilling record. Suriname’s biggest confirmed prize so far, a Petronas-run block, has turned up more than a billion barrels of oil-equivalent, but heavily weighted to gas.
It also explains the misses. Several Surinamese wells have delivered mixed or disappointing results, muddying the promise that the Golden Lane would simply continue eastward.
For an outside reader, the takeaway is nuance. Suriname is not a bust, but its oil is likely more scattered and gassier than Guyana’s, changing the economics of every well.
The scale of Guyana’s lead is stark. Its Golden Lane now pumps around nine hundred thousand barrels a day, a figure Suriname will not approach for years.
Suriname’s own timeline underlines the gap. Its first oil, from a large project led by a French major, is not due to flow until 2028.
Explorers are still betting on it. Suriname has opened a huge licensing round covering most of its offshore acreage, and majors have signed up despite the mixed results.
The study sharpens those bets. Rather than assuming the Golden Lane simply runs east, drillers can now weigh which prospects sit in the oil window and which in the gas one.
That is the forward signal. In a basin where a single well costs a fortune, knowing the likely difference between oil and gas before drilling is worth real money.
The wider region is watching. Together with Guyana and Trinidad, Suriname anchors a basin that has gone from marginal to one of the world’s most important new energy frontiers.
What remains to be seen is how companies will adapt their exploration strategies. Will they shift their search toward the cooler edges of Suriname’s blocks, or will they invest more heavily in gas infrastructure to make those finds commercial?
Another open question is whether the volcanic plateau extends farther than currently mapped, potentially affecting neighbouring waters. The study also raises a longer-term question for Guyana: as drillers move farther from the Golden Lane, could they eventually encounter similar heat challenges?
These are the puzzles that will shape the next wave of drilling decisions.
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Frequently Asked Questions
What does the Guyana Suriname oil study say?
A university study of the basin finds that Guyana’s oil-rich Golden Lane sits over older, non-volcanic crust, while neighbouring Suriname lies over a thicker volcanic plateau. The extra heat under Suriname pushes some prospects from oil toward gas, helping explain why Guyana has struck far more oil.
Why does Guyana find more oil than Suriname?
The study points to the deep crust. Guyana’s margin generated oil across a broad zone, whereas parts of Suriname’s margin sit over hotter, thicker volcanic rock that shifts the fluids toward gas and condensate, narrowing the sweet spot for oil.
Does this mean Suriname has no oil?
No. Suriname still holds major resources, including the TotalEnergies-led project due to start in 2028, but the study suggests its oil is likely more scattered and gas-prone than Guyana’s, which changes the risk and reward of each well.
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