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Tethys Oil books the company’s first reserves in Oman

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Tethys Oil's net working interest reserves in the Sultanate of Oman as per
December 31, 2012, amounts to 14.3 million barrels of oil (“mmbo”) of proven
and probable reserves. The reserves have been audited by independent petroleum
consultant DeGolyer and MacNaughton.

┌─────────────────────────────────────┐
│Reserves (Audited)                   │
├───────────────────────┬───┬────┬────┤
│Mmbo                   │1P │2P  │3P  │
├───────────────────────┼───┼────┼────┤
│Farha South Field, Oman│4.2│12.5│15.7│
├───────────────────────┼───┼────┼────┤
│Saiwan East Field, Oman│0.9│1.4 │2.5 │
├───────────────────────┼───┼────┼────┤
│B4EW3 discovery, Oman  │0.2│0.4 │0.5 │
├───────────────────────┼───┼────┼────┤
│Total                  │5.3│14.3│18.7│
└───────────────────────┴───┴────┴────┘

 

The reserves in the Farha South field are from the Barik reservoir section
only. The reserves in the Saiwan East field and the B4EW3 area discovery are in
the Khufai reservoir.

The review of the reserves in Oman has been conducted by independent petroleum
consultant DeGolyer and MacNaughton (“D&M”). The report has been calculated
using 2007 Petroleum Resources Management System (PRMS), Guidelines of the
Society of Petroleum Engineers (SPE), World Petroleum Council (WPC), American
Association of Petroleum Geologists (AAPG) and Society of Petroleum Evaluation
Engineers (SPEE).

The reserve report replaces the previous report by D&M regarding contingent
resources. Tethys Oil's net working interest resources oil base in the
Sultanate of Oman as at December 31, 2011, amounted to 2.6 mmbo of 1C
contingent resources, 9.8 mmbo of 2C and 12.4 mmbo of 3C.

Tethys Oil AB, through its wholly owned subsidiary Tethys Oil Block 3 and 4
Ltd, has a 30 per cent interest in Blocks 3 and 4. Partners are Mitsui E&P
Middle East B.V. with 20 per cent and the operator CC Energy Development S.A.L.
(Oman branch) holding the remaining 50 per cent.

Tethys also holds indirect interests in reserves onshore Lithuania.

 

For further information, please contact

Magnus Nordin, Managing Director, phone +46 70 5766555; magnus@tethysoil.com.

 

About reserves

Reserves are estimated remaining quantities of oil and natural gas and related
substances anticipated to be recoverable from known accumulations, as of a
given date, based on:

  • analysis of drilling, geological, geophysical, and engineering data
  • the use of established technology
  • specified economic conditions, which are generally accepted as being
    reasonable, and shall be disclosed

 

Reserves are classified according to the degree of certainty associated with
the estimates.

Proved reserves are those reserves that can be estimated with a high degree of
certainty to be recoverable. It is likely that the actual remaining quantities
recovered will exceed the estimated proved reserves.

Probable reserves are those additional reserves that are less certain to be
recovered than proved reserves. It is equally likely that the actual remaining
quantities recovered will be greater or less than the sum of the estimated
proved + probable reserves.

Possible reserves are those additional reserves that are less certain to be
recovered than probable reserves. It is unlikely that the actual remaining
quantities recovered will exceed the sum of the estimated proved + probable +
possible reserves.

 

About Contingent Resources

Contingent Resources are those quantities of petroleum estimated, as of a given
date, to be potentially recoverable from known accumulations using established
technology or technology under development, but which are not currently
considered to be commercially recoverable due to one or more contingencies.

 

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Tethys Oil AB (publ)

Tethys Oil is a Swedish energy company focused on exploration and production of
oil and natural gas. Tethys Oil’s core area is Oman, where the company is one
of the largest onshore oil and gas concession holders. Tethys Oil also has
exploration and production assets onshore France, Lithuania and Sweden. The
shares are listed on First North (TETY) in Stockholm. Remium AB is Certified
Adviser.

Website: www.tethysoil.com

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