Total Voting Rights

December 12, 2011

NOT FOR DISTRIBUTION IN THE UNITED STATES OR TO US NEWSWIRE SERVICES

The following information is exclusively intended for persons who are not residents of the United States and who are not physically present in the United States. This information does not constitute an offer or a solicitation of an offer to buy, securities of Tethys Petroleum in the United States or in any other jurisdiction in which such offer or solicitation is not authorized or to any person to whom it is unlawful to make such offer or solicitation. Potential users of this information are requested to inform themselves about and to observe any such restrictions. Tethys Petroleum's securities cannot be offered or sold in the United States without registration under the United States Securities Act of 1933, as amended, or pursuant to an exemption from such registration. Tethys Petroleum has not registered, and does not intend to register, any of its securities under the Securities Act or to conduct a public offering of securities in the United States. By proceeding to view the following information, you warrant that you are not located in the United States and you agree that you will not transmit or otherwise send any of the following information to any person in the United States or to publications with a general circulation in the United States.

TETHYS PETROLEUM PRESS RELEASE

Total Voting Rights

GRAND CAYMAN, CAYMAN ISLANDS, Monday, December 12, 2011 - Tethys Petroleum Limited ("Tethys" or the "Company")(TSX:TPL)(LSE:TPL) announces that further to completion of the private placement of 26,062,975 Ordinary Shares on December 9, 2011, the Company's total issued share capital is 286,692,744 Ordinary Shares of US$0.10 each. The Company does not hold any shares in treasury. The total number of Ordinary Shares with voting rights in the company will therefore be 286,692,744.

The above figure of 286,692,744 may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company, under the UK Disclosure Rules and Transparency Rules of the Financial Services Authority.

Tethys is focused on oil and gas exploration and production activities in Central Asia with activities currently in the Republics of Kazakhstan, Tajikistan and Uzbekistan. This highly prolific oil and gas area is rapidly developing and Tethys believes that significant potential exists in both exploration and in discovered deposits.

This press release does not constitute an offer or a solicitation of an offer to buy, securities of Tethys in the United States or to United States persons. The securities have not been and will not be registered under the United States Securities Act of 1933, as amended (the "U.S. Securities Act"), or any state securities laws and may not be offered or sold within the United States or to United States Persons unless registered under the U.S. Securities Act and applicable state securities laws or an exemption from such
registration is available.

The Ordinary Shares were offered and sold in certain jurisdictions outside of Canada.

This press release contains "forward-looking information" which may include, but is not limited to, statements with respect to our operations. Such forward-looking statements reflect our current views with respect to future events and are subject to certain risks, uncertainties and assumptions. See our Annual Information Form for the year ended December 31, 2010 for a description of risks and uncertainties relevant to our business, including our exploration activities. The "forward looking statements" contained herein
speak only as of the date of this press release and, unless required by applicable law, the Company undertakes no obligation to publicly update or revise such information, whether as a result of new information, future events or otherwise.

For information please contact:.

Tethys Petroleum Limited
Sabin Rossi
Vice President Investor Relations
Office: +1 416 572 2065
+1 416 572 2201 (FAX)
info@tethyspetroleum.com
Web: http://www.tethyspetroleum.com
Mobile site: m.tethyspetroleum.com

In Europe: Tethys Petroleum Limited
Veronica Zhuvaghena
Vice President Corporate Communications
Office: +44 1481 725911
+44 1481 725922 (FAX)

In Asia-Pacific: Quam IR
Anita Wan
Associate Director
Office phone/fax: +852 2217 2999