Colombia Update

    RNS Number : 1122L
  Black Rock Oil & Gas PLC
  05 January 2009
   

 For immediate release  5 January  2009

    Black Rock Oil & Gas Plc
    ("Black Rock" or the "Company")
    Colombia Update

    Black Rock Oil & Gas Plc ("Black Rock" or the "Company"), stock code: BLR, the AIM-traded oil and gas exploration and production
company, announces that the acquisition of a 33 square kilometre 3D seismic program over the Acacia Este discovery in the Las Quinchas
Association Contract area, Colombia has been concluded. Processing is almost complete and interpretation is underway.

    This survey was acquired in order to gain a greater definition of the basement including topographic highs and faults and any impact
these may have on the nature and distribution of the fluvial sands that constitute the reservoir in the Acacia Este field. As announced on
14 January 2008, differences in the nature and thickness of the reservoir sands in Acacia Este 2 compared to Acacia Este 1 have made
correlation between the wells more complex without further seismic data. These differences are not unusual with reservoir sand deposits
formed in a fluvial environment but the apparent absence in Acacia Este 2 of the higher performing sands recorded in Acacia Este 1 did
impact the flow rates recorded in the Acacia Este 2 test program.

    In addition, Black Rock announces that the Acacia Este 1 well was put back into long-term production testing on 24 November 2008.
Initially production rose to 122 barrels of oil per day ("BOPD") and has now settled back to around 40 BOPD. 

    Cold production testing is also being undertaken on Arce 4. Testing was initiated on 6 December 2008 with initial production peaking at
23 BOPD. This has now settled back to around 10 BOPD.

    Finally, Kappa Resources Colombia Ltd., part of Pacific Rubiales Energy Group and Operator of the Las Quinchas Association Contract, has
initiated drilling of Acacia Este 4, a deviated hole from the Acacia Este 1 location in a south-westerly direction. The well was spudded on
3 December 2008 and it is anticipated that drilling and completion will take approximately 30 days. This well will have a short slant
drilled section with an open hole gravel pack completion. A further well, Acacia Este 5, deviated from the Acacia Este 1 location towards
Acacia Este 2 in a northerly direction is expected to be initiated on completion of the Acacia Este 4 well. These wells are designed to test
the open hole completion strategy and compartmentalization of the Acacia Este Field.

    Black Rock Oil & Gas Plc is part owner of Las Quinchas Resource Corp., through which it has participated in the joint execution of
exploration and production activities in the Las Quinchas Block with Kappa Resources Colombia Ltd. Las Quinchas Resources Corp. and Kappa
Resources Colombia Ltd. are in the process of preparing the formal request of assignment to Las Quinchas Resource Corp. of 50% of the
private parties' interest in the Association Contract. This assignment is subjet to the approval of both Ecopetrol and the ANH, the
Colombian government agency responsible for overseeing Colombia's oil and gas exploration and production sector.

    Dr John Cubitt, Managing Director of Black Rock Oil & Gas Plc, commented:

    "The 3D seismic survey over the Acacia Este field and the drilling of Acacia Este 4 and 5 will provide important technical information
to enable the joint venture to identify suitable completion technology and well locations to apply to a program of appraisal drilling and
testing in 2009."

    Qualified Person

    Dr John Cubitt (a Director of the Company) has been involved in the oil and gas production industry for more than 28 years. Dr John
Cubitt is a registered Chartered Geologist (CGeol) and has a BSc and PhD in geology. He has compiled, read and approved the technical
disclosure as it relates to Black Rock in this regulatory announcement.

    Enquiries:

 Black Rock Oil & Gas Plc                        Tel: [phone] 
 Dr John Cubitt, Managing Director             www.blackrockoil.com

 Beaumont Cornish Limited (Nominated Adviser)    Tel: [phone]
 Michael Cornish                                                   


    ENDS

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