San Leon Energy Plc (SLGYY: OTCQX International) | Lewino-1G2 Operational Plan

28 June 2013

San Leon Energy Plc

(“San Leon” or the “Company”)

Lewino-1G2 Operational Plan

San Leon hereby provides an estimate of operational timings on its Lewino-1G2 well in the Gdansk W concession in the Baltic Basin, Poland.

Mobilisation of hydraulic fracturing equipment from United Oilfield Services (?UOS?) is underway, and the wellbore has been prepared using coiled tubing. Expected timings for the remainder of the work are provided below for guidance, and are subject to operational change.

29 June 2013: Pressure test and perforate the well.

02 July 2013: Perform a hydraulic fracture treatment through the 5-1/2? liner. As part of the evaluation process, UOS will provide microseismic monitoring to generate an image of the hydraulic fracture produced. The pumping itself is expected to last less than three hours, and will be followed by a flow back of fracture fluid for a number of hours. Sustained flow will require a completion tubing to be installed.

04 July 2013: Rig up workover unit and installation of 2-3/8? completion tubing.

14 July 2013: Commence cleaning the well of fracture fluids in order to achieve sustained flow. Coiled tubing and nitrogen will be used as required to lift fracture fluid returns. Up to 30 days of clean up and flow may be performed, for data acquisition.

The well has been designed such that an additional hydraulic fracture may then be performed at a different depth within the same formation. Any decision on additional hydraulic fracturing will be taken based upon results from the first fracture treatment.

San Leon will update the market with results at an appropriate time.

Executive Chairman, Oisin Fanning commented:

“With operations now underway, we look forward to sharing hydraulic fracturing results on Lewino-1G2 with the market by the middle of August.?

For further information contact:

Qualified person

Joel Price, who has reviewed this update, has 19 years? experience in the oil gas industry and is a member of the Society of Petroleum Engineers. He holds a BA in Natural Sciences from Cambridge University, an MEng from Heriot-Watt University, and an MBA from Durham University. Joel is currently the Head of Engineering for San Leon Energy and is based in San Leon?s London office.

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