PTR MINERALS LTD — Capital/Financing Update 2011

Aug 25, 2011

PETRATHERM LTD

Level 1, 129 Greenhill Road, Unley, South Australia 5061 Tel: +61 8 8274 5000 Fax: +61 8 8272 8141 Website www.petratherm.com.au Email admin@petratherm.com.au A.C.N. 106 806 884

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25 August 2011

Dear Shareholder

FURTHER EXTENSION TO PETRATHERM LTD SHARE PURCHASE PLAN

The Directors of Petratherm Ltd ( Company ) are pleased to announce a further extension of time to the offer to shareholders for the opportunity to participate in its Share Purchase Plan ( SPP ) to 30 September 2011.

The SPP has been further extended due to the current unfavourable general market conditions and the pending flow test of the Paralana 2 well which is now expected to be completed during September 2011.

The SPP entitles eligible shareholders of the Company to purchase up to $15,000 worth of fully paid ordinary shares in the capital of the Company, free from all brokerage and commissions.

As recently announced on 17 August 2011, the SPP was extended to close on 12 September 2011. In accordance with the terms and conditions of the SPP the Directors have chosen to extend the offer to a closing date of 5.00 pm (Adelaide time) on 30 September 2011.

Funds raised from the SPP will be applied to the preparatory work for the drilling of the Paralana 3 well at the Company’s flagship Paralana project in South Australia and for ongoing working capital. Specifically, funds will be applied to design the well, secure long lead time plant items and to secure a drilling rig slot.

I hope the further extension of the offer period for the SPP will assist you in giving favourable consideration to increasing your holding in and support for, the Company as we move towards the next stage of Paralana’s development.

Yours faithfully

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Derek Carter Chairman