REG - United Oil & Gas PLC - Jamaica Update: Commencement of Piston Coring

United Oil & GasAnnouncement

23/02/2026 07:00

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RNS Number : 9921T  United Oil & Gas PLC  23 February 2026

  United Oil & Gas PLC / Index: AIM / Epic: UOG / Sector: Oil & Gas

 

23 February 2026

United Oil & Gas plc

("United" or "the Company")

 

Completion of Stage 2 and Commencement of Stage 3 Piston Coring - Walton
Morant Licence, Jamaica

 

United Oil & Gas Plc (AIM: UOG), the oil and gas company with a
high-impact exploration asset in Jamaica and a development asset in the UK, is
pleased to announce the completion of Stage 2 of its Surface Geochemical
Exploration ("SGE") programme and the commencement of Stage 3 piston coring
operations on the Walton-Morant Licence offshore Jamaica.

 

Highlights

 

·    Stage 2 seabed heat-flow measurements successfully completed

·    Stage 3 piston coring now underway - the critical phase of the
programme

·    Up to 42 cores planned, primarily within the Walton Basin near the
key Colibri, Streamertail and Oriole prospects, with select key locations in
the Morant basin also identified

·    Programme designed to physically confirm an active petroleum system
and further de-risk the licence

 

Operational Update

 

Stage 2 heat-flow measurements have now been completed and will provide
valuable technical information for future geological modelling. Data from the
previously completed Stage 1 high-resolution multibeam echosounder ("MBES")
acquisition have also been integrated with the existing seismic dataset. This
has resulted in the identification of numerous seabed features of interest and
the selection of 42 optimal piston core locations for Stage 3 of the survey.

 

 

Figure 1 (above): Conceptual illustration of MBES seabed mapping integrated
with seismic interpretation to identify seabed features of interest and
optimise piston core locations (not to scale).*

 

Stage 3 piston coring is now underway, with up to 42 cores planned across
priority areas, predominantly within the Walton Basin and in proximity to the
Company's Colibri, Streamertail and Oriole prospects, where existing 3D
seismic and supporting datasets indicate potential hydrocarbon migration.
Additionally, key locations in the Morant basin will also be cored.

 

This stage of the survey will recover seabed sediment samples for geochemical
analysis to test for thermogenic hydrocarbons, which if present, will provide
direct physical evidence of an active petroleum system offshore Jamaica.

 

The piston coring operations are expected to take approximately one week,
subject to weather conditions, with samples then shipped to Houston, Texas for
laboratory analysis.

 

The SGE programme represents a key operational step toward further de-risking
the Walton-Morant Licence and advancing the project's technical evaluation and
commercial discussions.

 

 

Brian Larkin, CEO of United Oil & Gas, commented:

 

"The completion of heat-flow measurements and commencement of piston coring
marks a major step forward in our Jamaica exploration programme. The
integration of the acquired data has allowed us to optimise coring locations
in the Walton Basin, including near our key Colibri, Streamertail and Oriole
prospects, as well as at key locations in the Morant Basin.

Piston coring is the defining phase of this programme, providing the
opportunity to physically confirm the presence of thermogenic hydrocarbons
offshore Jamaica. We look forward to completing operations and updating the
market in due course."

 

Additional Information

A recent discussion with CEO Brian Larkin outlining progress of the SGE
programme and next steps is available to view here:

https://www.youtube.com/watch?v=PDHGGdWz9pY
(https://www.youtube.com/watch?v=PDHGGdWz9pY)

 

"On the Rocks" podcast episode 2, where United discuss the completed Stage 1
MBES and next steps of the SGE Jamaica survey 2026 is available to view here:

https://youtu.be/dMAtCalsI-o (https://youtu.be/dMAtCalsI-o)

 

"On the Rocks" podcast episode 1, where United discuss the Evidence for an
active Petroleum System offshore Jamaica, is available to view here:

https://youtu.be/Ui9krmLFXp4 (https://youtu.be/Ui9krmLFXp4)

 

*Image credit: NOAA Photo Library (via Flickr) - "Artist's conception of
multibeam sonar on NOAA Ship NANCY FOSTER" (Image ID: fis01334; Credit:
NOS/NCCOS/CCMA), licensed CC BY 2.0. Image cropped/adapted.

**ENDS**

 

 

 Enquiries
 United Oil & Gas Plc (Company)
 Brian Larkin, CEO                                      brian.larkin@uogplc.com

 Beaumont Cornish Limited (Nominated Adviser)
 Roland Cornish | Felicity Geidt | Asia Szusciak        +44 (0) 20 7628 3396

 Tennyson Securities (Joint Broker)
 Peter Krens                                            +44 (0) 20 7186 9030

 Shard Capital Limited (Joint Broker)                   +44 (0) 20 7186 9900

 Damon Heath | Isabella Pierre

 

Beaumont Cornish Limited ("Beaumont Cornish") is the Company's Nominated
Adviser and is authorised and regulated by the FCA. Beaumont Cornish's
responsibilities as the Company's Nominated Adviser, including a
responsibility to advise and guide the Company on its responsibilities under
the AIM Rules for Companies and AIM Rules for Nominated Advisers, are owed
solely to the London Stock Exchange. Beaumont Cornish is not acting for and
will not be responsible to any other persons for providing protections
afforded to customers of Beaumont Cornish nor for advising them in relation to
the proposed arrangements described in this announcement or any matter
referred to in it.

 

Notes to Editors

United Oil & Gas is an oil and gas company with a development asset in
the UK and a high impact exploration licence in Jamaica.

 

The business is led by an experienced management team with a strong track
record of growing full cycle businesses, partnered with established industry
players and is well positioned to deliver future growth through portfolio
optimisation and targeted acquisitions.

United Oil & Gas is listed on the AIM market of the London Stock
Exchange. For further information on United Oil and Gas please
visit www.uogplc.com (http://www.uogplc.com)

 

 

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