Jacala-1 Re-spuds Offshore WA

Roc Oil Company Limited
04 April 2006


4 April 2006

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

                 JACALA-1 RE-SPUDS, OFFSHORE WESTERN AUSTRALIA

ROC advises that the BHP Billiton-operated Jacala-1 wildcat exploration well in
WA-351-P re-commenced drilling operations on 3 April 2006, following the
evacuation of personnel from the Atwood Eagle rig due to cyclone activity, and
operational problems setting the conductor in the original hole.

As at 0600 hrs Western Standard Time on 4 April 2006 the well had been drilled
to a depth of 1,140 metres below rotary table and the current operation is
cementing the conductor.

Jacala-1 is located in the deep water Carnarvon Basin, offshore Western
Australia, approximately 200 km west of Barrow Island and 100 km northwest of
the Enfield Oil and Gas Field.

The well is expected to take about 18 days to reach a total depth of 2,322
metres.

The WA-351-P Joint Venture comprises:
                                                          Equity
BHP Billiton Petroleum (North West Shelf) Pty Ltd         55.0% & Operator
Tap (Shelfal) Pty Ltd                                     25.0%
Roc Oil (WA) Pty Ltd                                      20.0%

Michelle Manook                          For further information please contact:
General Manager - Corporate Affairs                             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]
                                                       Fax:  [phone]
                                                     Email:  [e-mail]
                                                                                
                                                                    Nick Lambert
                                            Bell Pottinger Corporate & Financial
                                                       Tel:  [phone]
                                                                                


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