Activity Update: Drilling

Roc Oil Company Limited
23 April 2008




23 April 2008

                         ROC OIL COMPANY LIMITED ('ROC')
                             STOCK EXCHANGE RELEASE

                           ACTIVITY UPDATE: DRILLING

1.   Offshore Mauritania

Roc Oil (Mauritania) Company, a wholly owned subsidiary of ROC, advises that as
at 0000 hours (local time) on 22 April 2008, the Banda NW appraisal well had
been plugged back to 1,078 mBRT and a sidetrack well, Banda NW ST-1, commenced
and drilled to 2,284 mBRT.

Since the last Stock Exchange Release on 16 April 2008, wireline pressure data
in Banda NW-1 had indicated penetration of a gas column, but as uncertainty
existed concerning the location of fluid contacts, a sidetrack borehole was
initiated.

The forward programme is to drill the sidetrack to further evaluate the
hydrocarbon column in a more favourable structural position.

Participating Interests in the PSC Area B Joint Venture are:

ROC Group Companies.......................................................3.693%
PC Mauritania I Pty Ltd (Operator).......................................53.846%
Tullow Oil plc...........................................................21.600%
Mauritania Holdings B.V..................................................11.630%
Premier Oil Mauritania B Limited..........................................9.231%

2.   Blane Oil Field, North Sea

Roc Oil (GB) Limited, a wholly owned subsidiary of ROC, advises that as at 0600
hours (local time) on 22 April 2008, the 'Ocean Princess' rig had completed
water injectivity tests on the 30/3a-3Z well.

The forward programme is to finalise connection of the well to the pre-laid
water injection pipeline from the Ula Platform.

Unitised Interests in the Blane Oil Field are:

Roc Oil (GB) Limited.......................................................12.5%
Talisman Energy (UK) Limited (Operator)....................................25.0%
Talisman Energy Norge AS...................................................18.0%
MOC Exploration (UK) Limited (a subsidiary of Nippon Oil Corporation)......14.0%
ENI UK Limited.............................................................13.9%
ENI ULX Limited.............................................................4.1%
Bow Valley Petroleum (UK) Limited..........................................12.5%

In accordance with ASX and AIM Rules, the information in this Release has been
reviewed and approved by Dr John Doran, Chief Executive Officer, Roc Oil Company
Limited, BSc (Hons) Geology, MSc and PhD. Dr Doran, who is a member of the
Society of Petroleum Engineers, has more than 30 years of relevant experience
within the industry and consents to the information in the form and context in
which it appears.

Damian Fisher
General Manager
External Affairs & Investor Relations

                                         For further information please contact:
                                                                Dr John Doran on
                                                            Tel: [phone]
                                                            Fax: [phone]
                                                     Email: [e-mail]
                                       Or visit ROC's website: www.rocoil.com.au
                                                                                
                                                                   Dr Kevin Hird
                                          General Manager - Business Development
                                     Tel: [phone]
                                     Mob: [phone]
                                                     Email:  [e-mail]
                                                                                
                                                                    Michael Shaw
                                    Oriel Securities Limited (Nominated Adviser)
                                                       Tel:  [phone]
                                                                                
                                                                     Bobby Morse
                                                         Buchanan Communications
                                                       Tel: + 44 (0)20 7466 5000
                                                       Fax: + 44 (0)20 7466 5001
                                                  E-Mail: [e-mail]
                                                        Mob: [phone]
                                                                                


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