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United Oil & Gas PLC (UOG)


Thursday 21 February, 2019

United Oil & Gas PLC

CPR upgrades Jamaica prospect to 229million bbls

RNS Number : 6645Q
United Oil & Gas PLC
21 February 2019

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

21 February 2019

United Oil & Gas PLC ("United" or the "Company") 

CPR upgrades offshore Jamaica prospect to 229million barrels on Tullow Oil-operated licence



·    High impact licence further upgraded by CPR based on new 2018 3D seismic data

·    229 MMstb of Gross Unrisked Mean Oil Prospective Resources has been assigned by ERCE to the high-grade undrilled Colibri prospect on the Tullow Oil-operated Walton-Morant licence, offshore Jamaica - an increase of 10 MMstb gross compared to previous estimates

·    The CPR assesses just one of a number of other structures the Company has identified in the licence

·    The increase in Gross Unrisked Mean Prospective Resources provides encouragement as progress is made towards a joint farm-down process


United Oil & Gas Plc, the London Stock Exchange listed oil and gas exploration and development company, is pleased to announce the results of an independent Competent Person's Report ('CPR') prepared by ERC Equipoise Ltd ('ERCE') covering the Walton-Morant licence ('the Licence'), offshore Jamaica. This includes an increase in Gross Unrisked Mean Oil Prospective Resources for the high grade undrilled Colibri prospect to 229 MMstb recoverable from 219 MMstb, and an increase in the geological chance of success. United holds a 20% equity interest in the 32,065 sq km Licence, with the remainder held by Tullow Jamaica Ltd ('Tullow'), a wholly owned subsidiary of leading independent oil and gas exploration and production company Tullow Oil plc (LSE: TLW).


ERCE was commissioned to update its 2017 volumetrics for the undrilled Colibri prospect following the acquisition of 2,250 sq km of state-of-the art 3D seismic data, the first ever acquired offshore Jamaica, in May 2018.  The CPR represents the culmination of a defined work programme to de-risk highly prospective Cretaceous and Tertiary-aged clastic and carbonate reservoir targets, including Colibri, that have been mapped by Tullow on 2D seismic data.  ERCE's updated volumetrics for Colibri are detailed in the table below:


Colibri Prospect, Walton-Morant Licence

Tullow Oil Operated

Gross Unrisked Prospective Resources (MMstb) for Colibri prospect

UOG Net Mean Unrisked Prospective Resources (MMstb)







ERCE 2019 Estimate







ERCE 2017 Estimate








1)     Prospects are features that have been sufficiently well defined through analysis of geological and geophysical data that they are likely to become drillable targets.

2)     "Gross Unrisked Prospective Resources" are 100% of the volumes estimated to be recoverable from an accumulation.

3)     "Net Mean Unrisked Prospective Resources" are UOG's working interest fraction of the mean estimate of the gross resources.

4)     Prospective Resources reported here are "unrisked" in that the volumes have not been multiplied by the geological chance of success (COS), nor have they have been multiplied by the chance of development (Pd).

5)     The COS is an estimate of the probability that drilling the prospect would result in a discovery as defined under SPE PRMS.



United Oil & Gas PLC CEO, Brian Larkin, said: "The high-grade undrilled Colibri prospect has not only passed robust and comprehensive technical scrutiny by an independent third party, but ERCE has seen fit to upgrade the gross Mean Unrisked Prospective Resources to 229 MMstb and to increase the likelihood of success.  This is a standout outcome, as it is not uncommon for volumes to be downgraded when structures, that have previously been identified on 2D seismic, are mapped on a 3D dataset.  The upgrade in the resources assigned to Colibri is testament to the work carried out by the partners, the quality of the licence and the strength of the geological model we have put in place.  The next step for Colibri would be making the decision to drill what could be a transformational well for United and with this in mind we are working closely with Tullow on a forward plan for the Licence.


"Gross Unrisked Mean Prospective Resources of 229 MMstb are eye-catching, particularly for a company of our size.  While not included in this CPR, we have identified a number of other structures which we believe would be significantly de-risked were a well targeting Colibri to be successful. 


"We have already seen considerable industry interest in the Walton Morant Licence.  This CPR and the ongoing seismic interpretation will provide additional impetus to the joint farm down process which we are confident will allow United to participate in this licence at a low-cost exposure, while continuing to offer considerable potential upside for shareholders."


ERCE has given its consent to the reference to its CPR in this announcement. ERCE confirms it has reviewed this announcement and confirms that the estimates of Gross and Net Unrisked Prospective Resources have been correctly extracted from the CPR.


The CPR has been signed by Mr Simon McDonald, Founder Director of ERCE, a Chartered Engineer and the Past President of The Society of Petroleum Evaluation Engineers (SPEE), who has over 40 years' experience in the evaluation of oil and gas fields and acreage, preparation of development plans and assessment of reserves and resources.





For more information please visit the Company's website at or contact: 


United Oil & Gas Plc (Company)

Brian Larkin

[email protected]

Optiva Securities Limited (Broker)

Christian Dennis

+44 (0) 20 3137 1902

Beaumont Cornish Limited (Financial Adviser)

Roland Cornish and Felicity Geidt

+44 (0) 20 7628 3396

Murray (PR Advisor)

+353 (0) 87 6909735

Joe Heron



[email protected]

St Brides Partners (Financial PR/IR)

Frank Buhagiar and Juliet Earl

+44 (0) 207 236 1177

Notes to Editors


United Oil & Gas plc (UOG) is listed on the main market of the London Stock Exchange. United was established to explore, appraise and develop low risk assets in Europe and to develop higher risk, higher impact exploration projects in the Caribbean, Latin America and Africa.


The following table outlines the Company's licence interests:



Operator / Administrator

United Interest

 Next Stage of Development


Podere Gallina Licence

Po Valley Operations Pty Ltd


CPR complete

Infrastructure build 2019

Production from Podere Maiar well expected in 2020

Evaluation of exploration opportunities continuing


PL090 (Waddock Cross)

Egdon Resources UK Limited


Development drilling targeted in 2019


PL090 (Exploration)

Egdon Resources UK Limited


Technical work to de-risk exploration targets continuing


P1918* (Colter)

Corallian Energy Limited


Colter drill underway

Results due in March


PEDL 330

Corallian Energy Limited


Technical work to de-risk exploration targets continuing


PEDL 345

Corallian Energy Limited


Technical work to de-risk exploration targets continuing


P2366* (Crown)

United Oil & Gas Plc


CPR Complete

Seismic reprocessing underway ahead of likely farm down process



Tullow Jamaica Ltd


CPR complete with significant upgrade

Interpretation of seismic ongoing ahead of joint farm down process



Glossary of Technical Terms


bbl, bbls

barrel, barrels


barrels per day


competent person's report




net present value

Prospective Resources

Prospective Resources are those quantities of petroleum estimated, as of a given date, to be potentially recoverable from undiscovered accumulations by application of future development projects. Prospective Resources have both an associated chance of discovery and a chance of development. They are further subdivided in accordance with the level of certainty associated with recoverable estimates assuming their discovery and development and may be sub-classified based on project maturity.


The 2018 Petroleum Resource Management System (SPE)


Society of Petroleum Engineers









stock tank barrels

Denotes the unrisked low estimate qualifying as Prospective Resources

Denotes the unrisked best estimate qualifying as Prospective Resources

Denotes the unrisked high estimate qualifying as Prospective Resources

The sum of a set of numerical values divided by the number of values in the set




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