RNS Number:6687G
Roc Oil Company Limited
25 July 2006


25 July 2006

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

                          EXPLORATION DRILLING UPDATE
                    PERTH BASIN, OFFSHORE WESTERN AUSTRALIA

Roc Oil (WA) Pty Limited advises that since its last Stock Exchange Release on
24 July 2006 regarding the Moondah-1 exploration well in TP/15, the ENSCO 67
jack-up drilling rig commenced drilling operations on 24 July at 1400 hours
Western Standard Time ("WST").

As at 0600 WST on 25 July 2006, the well had been drilled to a depth of 92
metres and the current operation was preparing to drill ahead out of the 20"
conductor.

Moondah-1 is located offshore, 17 km north of Cliff Head and 4 km west of
Dongara, in a water depth of 12 metres and has a planned Total Depth of 1,330
metres.

Moondah-1 will target Late Permian reservoir sands in a large rotated fault
block in the northern part of the Beagle Ridge.

The TP/15 Joint Venture comprises:

    Roc Oil (WA) Pty Limited (Operator)      20.0%
    ARC Energy Limited                       45.0%
    AWE Oil (Western Australia) Pty Lt       25.0%
    Westranch Holdings Pty Limited           10.0%



Michelle Manook                          For further information please contact:
General Manager - Corporate Affairs                             Dr John Doran on
                                                            Tel: +61-2-8356-2000
                                                            Fax: +61-2-9380-2635
                                                     Email: jdoran@rocoil.com.au
                                       Or visit ROC's website: www.rocoil.com.au
                                                                                
                                                                   Dr Kevin Hird
                                            General Manager Business Development
                                                       Tel:  +44 (0)207 586 7935
                                                       Fax:  +44 (0)207 722 3919
                                                     Email:  khird@rocoil.com.au
                                                                                
                                                                    Nick Lambert
                                            Bell Pottinger Corporate & Financial
                                                       Tel:  +44 (0)207 861 3232
                                                                                


                      This information is provided by RNS
            The company news service from the London Stock Exchange

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