Tethys Oil

Report Publication Announcement • Sep 4, 2013

Press release 2013-09-04

Production update August 2013

Tethys' share of the production, before government take, from Blocks 3 and 4 onshore the Sultanate of Oman amounted in August 2013 to 149,372 barrels of oil, corresponding to 4,818 barrels of oil per day (bopd). The total production from Blocks 3 and 4 amounted in August to 497,906 barrels of oil, corresponding to 16,061 bopd.

The production includes production from the Farha South field on Block 3, the Saiwan East field on Block 4 and test production from the B4EW4 discovery on Block 4.

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.

For further information, please contact

Magnus Nordin, Managing Director, phone +46 70 576 6555; magnus@tethysoil.com

---

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 NASDAQ OMX Stockholm (TETY) in Stockholm.

Website: www.tethysoil.com