Drilling Update - Cliff Head

Roc Oil Company Limited
15 May 2006



15 May 2006

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

                          PRODUCTION & DRILLING UPDATE
                              CLIFF HEAD OIL FIELD

ROC, as Operator of the Cliff Head Oil Field Development Project in the offshore
Perth Basin advises that at 2300 hours on 11 May 2006, production commenced from
the second well in the field, CH-12H, which is the first of the four horizontal
production wells to be brought on stream.

As at 14 May 2006, CH-12H was producing at an approximate rate of 6,800 barrels
of oil per day ('BOPD'). The CH-6 well, the first well brought on production
earlier this month at a rate of approximately 1,000 BOPD, has been temporarily
shut-in while repair work is undertaken on the electric submersible pump.

Field production rates are expected to continue to increase to greater than
10,000 BOPD as the four other designated oil producers, including three
horizontal wells, are brought on stream during the next several weeks.

The produced oil is transported via a 14 km pipeline to the onshore Arrowsmith
Stabilisation Plant from where it is trucked to the new BP Crude Oil Unloading
Facility at Kwinana.

The first export of Cliff Head crude oil from the Arrowsmith Stabilisation Plant
was delivered to the BP Kwinana Unloading Facility on the 5 May 2006.

The Cliff Head Joint Venture comprises:
                                                        Equity
Roc Oil (WA) Pty Limited                                37.5% & Operator
AWE Oil (Western Australia) Pty Ltd                     27.5%
Wandoo Petroleum Pty Ltd                                24.0%
ARC (Offshore PB) Limited                                6.0%
CIECO Exploration and Production (Australia) Pty Ltd     5.0%


In accordance with new rules from the Alternative Investment Market ('AIM') of 
the London Stock Exchange, ROC advises that the information in this report has 
been reviewed by an appropriately qualified person with more than 5 years 
relevant industry experience, specifically Mr Simon Daniel, BMechEng; MSc
(Exploration & Geophysics); MSc(Petroleum Engineering), Asset Manager-Cliff Head
Project, Roc Oil Company Limited, and a member of the Society of Petroleum
Engineers.


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]



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