Mauritania Drilling Update

Roc Oil Company Limited
27 September 2005




27 September 2005

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

                      MAURITANIA OFFSHORE DRILLING UPDATE

ROC advises that the following release was made earlier today by Woodside
Petroleum Ltd:

'Woodside Mauritania Pty. Ltd., a wholly-owned subsidiary of Woodside Petroleum
Ltd., reports the following activity offshore Mauritania since the last report
issued on 20 September 2005.

          PSC Area B: Tevet-2 Combined Appraisal and Exploration Well

The 'Stena Tay' rig drilled the Tevet-2 well to a depth of 2,785 metres.
Wireline logs, including fluid sampling and downhole pressure measurements, were
acquired over the Miocene appraisal objective, where oil and gas was discovered
in the Tevet-1 well. A preliminary evaluation of these data and data acquired
while drilling has established that the well intersected a gross gas interval of
approximately 1.5 metres above a gross oil interval of approximately 37 metres.

Whilst the hydrocarbon sands are of a similar thickness to those discovered in
the Tevet-1 well, the amount of reservoir sand is less than expected. Further
studies will be required to determine the significance of the Tevet-2 result.

At midnight on 26 September 2005, preparations were underway to drill to the
next casing point. The well will then target a deeper exploration prospect. The
planned total depth of the well is approximately 3,965 metres.

                          Chinguetti Development Wells

The 'West Navigator' drillship continues to perform completion work on
Chinguetti Development wells. Woodside does not plan to issue regular
announcements regarding operations on Chinguetti development wells but will do
so if necessary to comply with its continuous disclosure obligations under the
ASX Listing Rules.

                                    General

All reported drilling depths are referenced to the rig rotary table and all
times are Universal Time (UTC) (Mauritanian time).

The locations of planned exploration wells and the Chinguetti Oil Field are
shown on the attached map*.'

Participating Interests in the Chinguetti Joint Venture and relevant PSC areas
are:

  +---------------------------+-----------+----------+----------+----------+
  |          Company          |Chinguetti |  PSC-A   |  PSC-B   |  PSC-C,  |
  |                           |   Joint   |          |          | Block 6  |
  |                           |  Venture  |          |          |          |
  +---------------------------+-----------+----------+----------+----------+
  |Woodside group companies   | 47.38448% | 53.846%  | 53.846%  | 37.578%  |
  |(Operator)                 |           |          |          |          |
  +---------------------------+-----------+----------+----------+----------+
  |Hardman group companies    | 19.00800% |  24.3%   |  21.6%   | 22.422%  |
  +---------------------------+-----------+----------+----------+----------+
  |Groupe Project Chinguetti  | 12.00000% |    --    |    --    |    --    |
  +---------------------------+-----------+----------+----------+----------+
  |BG group companies         | 10.23440% | 13.084%  |  11.63%  |    --    |
  +---------------------------+-----------+----------+----------+----------+
  |Premier group companies    | 8.12328%  |    --    |  9.231%  |    --    |
  +---------------------------+-----------+----------+----------+----------+
  |Roc Oil group companies    | 3.24984%  |  4.155%  |  3.693%  |   5.0%   |
  +---------------------------+-----------+----------+----------+----------+
  |Fusion group companies     |    --     | 4. 615%  |    --    |    --    |
  +---------------------------+-----------+----------+----------+----------+
  |Petronas Carigali Overseas |    --     |    --    |    --    |  35.0%   |
  |Sdn Bhd                    |           |          |          |          |
  +---------------------------+-----------+----------+----------+----------+

*Map attached to the copy of this release on ROC's website.
(http://www.rocoil.com.au/Pages/ASX_Releases/2005_Releases/September-2005.html)

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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