Drilling Update: Perth Basin

Roc Oil Company Limited
17 April 2007


17 April 2007

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

                            Drilling Activity Update:
             Offshore Perth Basin Exploration Drilling - Frankland-1

Roc Oil (WA) Pty Limited advises that as of 1000 hrs on 17 April 2007 Australian
Western Standard Time (AWST), the Frankland-1 exploration well in WA-286-P
offshore Perth Basin was drilling ahead at 2,090 metres.

Since the last drilling report (10 April) the well drilled to 1,720 metres where
244 mm casing was set prior to drilling on to the present depth.

Based on preliminary drill data and Measurement While Drilling information, it
appears that the top of the reservoir objective was encountered some 50 metres
high to prognosis at approximately 1,983 Metres Below Rotary Table (MBRT).
Current tentative interpretation suggests that hydrocarbons are present in the
main reservoir objective from 1,983 MBRT to 2,018 MBRT, over an internal of 35
metres.

Between 2,018 MBRT and current depth, the predominant lithology appears to be
low net/ gross section with high background gas, but with possible further
hydrocarbon saturation in thin sands. An additional zone of potential interest
was encountered in the up hole section of the well between 1,338 MBRT and 1,348
MBRT.

The forward programme is to drill to the proposed total depth of 2,210 MBRT and
run a full suite of electrical logs to evaluate more precisely the nature and
significance of the hydrocarbon indications encountered by the well.

Participating Interests in WA-286-P are:
Roc Oil (WA) Pty Ltd (Operator)...............................37.5%
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 ASX Listing Rules and AIM Rules, the information in this
Release has been reviewed and signed off by Dr John Doran, Chief Executive
Officer, Roc Oil Company Limited, BSc (Hons) Geology; MSc and PhD. Dr Doran has
at least five years' relevant experience within the sector and consents to the
information in the form and context in which it appears.



Damian Fisher
General Manager
External Affairs & Investor Relations

                                         For further information please contact:
                                                                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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