Exploration Drilling Update

Roc Oil Company Limited
26 April 2006


26 April 2006


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

                          EXPLORATION DRILLING UPDATE

1. Wei-6-12-S-1, Block 22/12, Beibu Gulf, Offshore China (ROC: 40% and Operator)

At 1200 hrs local time on 25 April 2006 the COSL 931 jack-up drilling rig
commenced drilling the Wei-6-12-S-1 exploration well. As at 1900 hrs on 25 April
the well had drilled to a depth of 124 metres and the current operation was
running 20 inch casing. The well is expected to take about 21 days to drill to a
Total Depth of 2,530 metres.

Wei-6-12-S-1 is located in about 30 metres of water about 3 km southwest of the
2002 oil discovery, Wei-6-12-1.

The Block 22/12 Joint Venture comprises:

Roc Oil (China) Company 40% and Operator
Horizon Oil Limited                             30%
Petsec Energy Ltd                               25%
Oil Australia Pty Ltd*                           5%
* subsidiary of First Australian Resources

2. Willows-1, PEDL030, Onshore UK (ROC: 100% & Operator)

As at 2400 hrs UK Time on 25 April 2006 the Willows-1 exploration well had been
drilled to a depth of 794 metres and the current operation was running 10 3/4
inch casing. The proposed Total Depth is approximately 2,500 metres.

Willows-1 is targeting a potentially large gas prospect located about 55 km east
of York and 15 km south of Scarborough.

3. Jacala-1, WA-351-P, Carnarvon Basin, Offshore Western Australia (ROC: 20%)

As at 1000 hours Western Standard Time on 23 April 2006, the BHP Billiton
operated Jacala-1 wildcat exploration well was plugged and abandoned after the
formation evaluation programme confirmed the previously reported view that there
are no hydrocarbons in the well.

Jacala-1 is located in about 1,060 metres of water approximately 200 km west of
Barrow Island and 100 km northwest of the Enfield Oil and Gas Field.

The WA-351-P Joint Venture comprises:

BHP Billiton                                     55% & Operator
Tap (Shelfal) Pty Ltd                            25%
Roc Oil (WA) Pty Ltd                             20%

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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