Drilling Update-Perth Basin

Roc Oil Company Limited
11 May 2007




11 May 2007

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

                            Drilling Activity Update:
            Offshore Perth Basin Exploration Drilling - Perseverance-1

Roc Oil (WA) Pty Limited advises that as of 01:30 hours on 11th May 2007
Australian Western Standard Time ('AWST') the Premium 'Wilcraft' jack-up
drilling rig commenced drilling the Perseverance-1 exploration well in WA-325-P
in the Perth Basin, 33 km WNW of Geraldton and about 100 kilometres NW of the
Cliff Head Oil Field, offshore Western Australia.

As at 0600 hrs on 11th May 2007 AWST the current operation was drilling surface
hole at 107 metres.

Perseverance-1, the second of the planned three well exploration drilling
programme in the region, is scheduled to reach the proposed Total Depth of 1,774
metres by late next week.


Participating Interests in WA-325-P are:

Roc Oil (WA) Pty Ltd (Operator)......................................37.5%
Apache Northwest Pty Limited.........................................37.5%
ARC (Offshore PB) Limited............................................20.0%
Wandoo Petroleum Pty Ltd. (Mitsui & Co Group of Companies)............5.0%




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]
                                                                                 
                                                                    Nick Lambert
                                            Bell Pottinger Corporate & Financial
                                                       Tel:  [phone]




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