Fresh data from offshore exploration activities has revealed the presence of hydrocarbon indicators along Jamaica’s southern seabed, according to United Oil & Gas Plc.
The company disclosed that analysis from its latest geochemical survey identified butane and pentane compounds within collected samples. Chief Executive Officer Brian Larkin said the findings strengthen the company’s technical understanding of the licence area and will play a key role in upcoming decisions regarding potential drilling.
United Oil & Gas currently holds the Walton-Morant Licence, a large offshore exploration block spanning approximately 22,000 square kilometres along Jamaica’s southern coastline. The recent study involved laboratory testing of 42 piston core samples gathered during the 2026 Seabed Geochemical Exploration programme.
According to the company, the hydrocarbons detected—classified as C4 and C5 compounds—are not typically linked to biologically produced gas systems. Instead, their characteristics suggest a thermogenic origin, meaning they were likely formed from organic material subjected to high temperatures and pressure deep beneath the earth’s surface. This process is commonly associated with the formation of commercial oil and gas reserves.
The findings build on earlier observations within the licence area, including repeated reports of surface slicks and previous 2D and 3D geological modelling. Samples collected from both the ocean water and seabed have been undergoing detailed analysis to better assess the area’s resource potential.
Jamaica’s offshore basin has previously attracted comparisons to the Guyana-Suriname region, known for significant oil discoveries. However, experts have cautioned that visible oil-like substances in Jamaican waters may not necessarily indicate commercially viable reserves, highlighting the importance of continued scientific evaluation such as the current survey.
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