Ptr Minerals Limited · ASX:PTR

Ptr Minerals — Petratherm — Geothermal Resources Council Conference 2011

20 slides from Ptr Minerals's conference presentation, Oct 27, 2011

1. Slide 1: Presentation to the Geothermal Resources Council Conference, San Diego

   ASX Release For personal use only PETRATHERM LIMITED ABN 17 106 806 884 Presentation to the Geothermal Resources Council Conference, San Diego, California Petratherm’s Exploration Manager, Mr Peter Reid, earlier this week presented to an international audience at the Geothermal Resources Conference

2. Slide 2: Paralana EGS Project - Findings from the Fracture Stimulation

   Paralana EGS Project - Findings from the Fracture Stimulation For personal use only Geothermal Resources Council Conference, San Diego, California Peter Reid Exploration Manager October 2011

3. Slide 3: Disclaimer and competent persons statement

   Disclaimer and competent persons statement Disclaimer Any forward-looking statements included in Petratherm makes no representation or For personal use only this document involve subjective judgment warranty as to the accuracy, reliability or This presentation has been prepared by and analysis and a

4. Slide 4: Petratherm overview

   Petratherm overview For personal use only MADRID Our company & BARCELONA Direct use heat, EGS & hydrothermal  Projects spanning Australia, Spain and China CHINA TENERIFE & Exclusive GRAN CANARIA exploration Conventional agreement volcanic  Projects across the spectrum of geothermal PARALANA & EAST

5. Slide 5: Paralana Project – commercial / market overview

   Paralana Project – commercial / market overview For personal use only  Small off grid market (5-30MWe)  Potential large on grid development (260 MWe+)  Expenditure well leveraged for proof of concept, then potentially fully funded to initial commercial demonstration scale 30MWe plant  Funding an

6. Slide 6: Paralana Project – Regional Picture

   Paralana Project – Regional Picture For personal use only

7. Slide 7: Development Model – Heat Exchanger within Insulator

   Development Model – Heat Exchanger within Insulator For personal use only › Higher Permeability › Chemically Stable › Mesoproterozoic metasediments - bedding / joint surfaces › Fracture Permeability at Basin / Basement Interface (FABBI) = Cheaper Power!

8. Slide 8: 2D seismic interpretation suggests faults and fractures may be regionally extensive

   2D seismic interpretation suggests faults For personal use only and fractures may be regionally extensive below a thick quartzite sequence

9. Slide 9: Paralana well summary

   Paralana 2 well summary › For personal use only Depth 4003m (G.L. A.H.D.) › Well cased and cemented to 3725m › Extrapolated bottom hole temperature ~ 190oC › High pressure geothermal brines intersected from 3680m › Zircon dating confirms 1585 ± 11 Ma Reservoir Sequence › Contains numerous fractures

10. Slide 10: Paralana – Brine Intersected

    Paralana 2 – Brine Intersected For personal use only  High torque, intervals of high ROP’s, drilling breaks and increase in well bore deviation  Inflow of over-pressured geothermal brines between 3670 - 3864 m  Shut in pressure indicated ~ 3,300 psi, of overpressure and mud system weighted up to

11. Slide 11: Passive seismic array

    Passive seismic array For personal use only  MEQ - Array Managed by IESE  1 deep borehole sonde at 1800m in Paralana 1b  6 borehole sondes ~ 200m  10 surface seismometers  4 accelerometers

12. Slide 12: Injectivity test – January 2011

    Injectivity test – January 2011 For personal use only › 15000 litres injected › Pressure ~ 8700 psi › Rates ~ 0.5 and 2 bpm › WHP ~ 4000 psi › > 140 MEQ › Magnitude -1 to 1 (RS) The fracture array cloud measured by the array indicated that it extended 300m by 200m and was approximately 130m thick.

13. Slide 13: Fracture Stimulation – Key Statistics

    Fracture Stimulation – Key Statistics For personal use only › 3.1 million litres injected › Injection rates: 1.2 - 10 bpm › Equilibrium WHP prior and post operation 3940 psi. › Acid treatments allow higher pumping rates. › Sand proppant successfully placed Photo: courtesy Advertiser, July 2011 at en

14. Slide 14: Fracture Stimulation – Pressure and flow rate

    Fracture Stimulation – Pressure and flow rate For personal use only Note - This pressure rise is only at surface, not downhole

15. Slide 15: MEQ events – main fracture

    MEQ events – main fracture For personal use only › MEQ array successfully recorded microseismicity: › 11’000 events triggered and located by MIMO, › 2’600 events handpicked › Maximum magnitude on the Richter Scale: 2.6 › 98% of the events were less than Mag 1.0 › Ground motion – acceleration and vel

16. Slide 16: MEQ events

    For personal use only MEQ events

17. Slide 17: MEQ events: interpretation

    For personal use only MEQ events: interpretation

18. Slide 18: MEQ events: interpretation

    MEQ events: interpretation For personal use only

19. Slide 19: Key milestones for the Paralana geothermal project

    Key milestones for the Paralana geothermal project For personal use only Paralana JV project planned milestones  3rd Qtr 2011: Main fracture stimulation   3rd Qtr 2011 : Flow test   1st half 2012: drilling of the Paralana 3 deep producer well  Mid-2012: Circulation Test – Demonstration of Flow

20. Slide 20: For personal use only

    For personal use only

Petratherm — Geothermal Resources Council Conference 2011 on 6ix