This photo shows Petratherm's Paralana 2 well head rigged for a hydraulic fracturing activity undertaken during July 2011, in South Australia. Water was injected at pressures up to 9000 psi and with sustained pump rates of up to 1600 litres per minute. This created a zone of subsurface micro-fracturing extending up to 900 meters in one direction away from the well at a depth of between 3500 and 4000 meters. The largest seismic event detected was magnitude 2.6 on the Richter scale with 98% of the micro-seismic events detected being below 1.0. None of the events were felt outside of the project area, and the project operated well within all of the regulated safety regimes.
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