Tracey J. Mercier Phuong A. Le Andrea D. Cicero Sarah E. Gelman Jane S. Hearon Benjamin G. Johnson Jenny H. Lagesse Heidi M. Leathers-Miller Christopher J. Schenk 2026 <p>Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean conventional resources of 37.6 billion barrels of oil and 281.6 trillion cubic feet of gas in 31 geologic provinces of South America and the Caribbean.</p> application/pdf 10.3133/fs20263066 en U.S. Geological Survey Assessment of undiscovered conventional oil and gas resources of South America and the Caribbean, 2025 reports