Mauritania Drilling Update

Roc Oil Company Limited
22 June 2005





22 June 2005

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

                      MAURITANIA OFFSHORE DRILLING UPDATE

ROC advises that Woodside Mauritania Pty Ltd, a wholly-owned subsidiary of
Woodside Petroleum Ltd., has announced that the first three exploration
locations for its 2005 exploration drilling sequence have been selected.

Two of the wells, Sotto and Colin, will target relatively high risk but
potentially high reward prospects in PSC Area A. The third well, Espadon, is
targeting a medium risk, moderate reward prospect close to the Tiof Discovery in
PSC Area B. It is planned to commence drilling these wells in late July 2005
using the Stena Tay drill rig.

The locations of these three initial exploration wells and previous
Woodside-interest wells and discoveries are shown on the attached map*.

A further three wells are likely before the end of the year, including one in
PSC Area C6. Subsequent announcements will be made concerning these wells.

The West Navigator drillship continues working on Chinguetti development wells.

Woodside does not plan to issue 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.'

Participating Interests in the Chinguetti Exploitation Perimeter and PSC areas
in which activity is planned are:

+-------------------------------+------------+-----------+----------+---------+
|Company                        | Chinguetti |PSC Area A |PSC Area B|PSC Area |
|                               |Development |           |          |   C6    |
+-------------------------------+------------+-----------+----------+---------+
|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 Sdn |          --|         --|        --|    35.0%|
|Bhd                            |            |           |          |         |
+-------------------------------+------------+-----------+----------+---------+

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

Bruce Clement                            For further information please contact:
Chief Operating Officer                                         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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