Drilling Update

RNS Number:7685K
Black Rock Oil & Gas PLC
28 December 2007



For immediate release                                    28 December 2007


                            Black Rock Oil & Gas PLC

                        ("Black Rock" or the "Company")

                                Drilling Update

                      Acacia Este-2 Appraisal Well Spudded


Black Rock Oil (stock code: BLR), the AIM-traded oil and gas exploration and
production company, announces that the Acacia Este 2 appraisal well in the Las
Quinchas Association Contract in the Middle Magdalena Valley of Colombia was
spudded by its joint venture operator, Kappa Resources Colombia Limited
("Kappa") on December 21st 2007 and drilling operations are underway. The
Directors expect the well to take up to 40 days to drill, test and complete.

Acacia Este was announced as a discovery on the 18 July 2007 producing oil from
several sand horizons in the Tertiary Mugrosa Formation. Testing subsequently
recovered heavy oil to a maximum rate of 101 barrels per day with only 5 per
cent. bottom sediment and water at standard conditions and low pump rates.
Following re-completion, the well was put onto a production test, the results of
which at this point are very encouraging. Our joint venture partner in Colombia,
Kappa, intends over the next year to conduct a programme of appraisal well
drilling and new seismic acquisition over the Acacia Este field to delineate the
size and nature of this important discovery.

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

"The spudding of Acacia Este 2 which is 0.5 kilometres from the Acacia Este
discovery well represents the first step in the appraisal of the significant
heavy oil discovery made earlier this year. We eagerly await the outcome of the
well."

Qualified Person

Dr John Cubitt (a Director of the Company) has been involved in the oil and gas
production industry for more than 26 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.


For further information, please contact:

+------------------------------------------+--------------------------------+
|Black Rock Oil & Gas plc                  |01189 001350                    |
+------------------------------------------+--------------------------------+
|Dr John Cubitt, Managing Director         |www.blackrockoil.com            |
+------------------------------------------+--------------------------------+
|Beaumont Cornish                          |0207 628 3396                   |
+------------------------------------------+--------------------------------+
|Michael Cornish                                                            |
+---------------------------------------------------------------------------+
|Aquila Financial Limited 0207 202 2601                                     |
+------------------------------------------+--------------------------------+
|Peter Reilly                              |                                |
+------------------------------------------+--------------------------------+


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