2013-04-03

Annual Information Update

Wednesday, April 3, 2013

TETHYS PETROLEUM LIMITED PRESS RELEASE

("Tethys" or "the Company" (TSX:TPL, LSE:TPL))

Annual Information Update

LONDON, ENGLAND - Tethys Petroleum today provided an Annual Information Update for the period 20 April 2012 to 2 April 2013.

In accordance with Prospectus Rule 5.2, the Company sets out below a summary of the information, which has been published or made available to the public during the period. The information referred to in this update was current at the time of publication, but some information may now be out of date and some of it will have been prepared in accordance with requirements of jurisdictions other than England & Wales. It is not provided for any other purpose and neither the Company, nor any other person, takes any responsibility for, or makes any representation, express or implied, as to the accuracy or completeness of, the information, which it contains. Further, such information prepared in accordance with the laws or regulations of a particular jurisdiction other than England & Wales may not comply with or meet the relevant standards of disclosure in any other jurisdiction.

1. The following announcements were made during the period to the London Stock Exchange via RNS:

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20/04/12 Annual Information Update
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24/04/12 Notification of Transactions of Directors/Persons Discharging
Managerial Responsibility and Connected Persons
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16/05/12 Q1 Financial Results and Conference Call Details
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16/05/12 Kazakhstan Oil Resource Upgrade
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16/05/12 New Oil Field Acquired in Uzbekistan
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29/06/12 Tethys Secures Loan Facility Provided by a Kazakh Bank
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09/07/12 New Director Appointed
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10/07/12 Notification of Transactions of Directors/Persons Discharging
Managerial Responsibility and Connected Persons
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11/07/12 Appointment of Tethys Vice Chairman to Uzbek-British Trade &
Industry Council
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19/07/12 Tajikistan Resource Upgrade 27.5 Billion BOE
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30/07/12 New CEO and Chairman of Tethys Appointed
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06/08/12 Notification of Major Interest of Shares
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15/08/12 Q2 Financial Results and Operations Update
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10/09/12 Organisational Changes
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10/09/12 Operations Update
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18/09/12 Dr. David Robson to appear on BNN-Canada's Business News Network
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01/10/12 Notification of Major Interest of Shares
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12/10/12 AKD07 in Kazakhstan Preliminary Results
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18/10/12 AKD07 in Kazakhstan to be Tested
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26/10/12 Tethys signed MOU with an IOC to Acquire Interest in Tajikistan
PSC
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13/11/12 Operations Update
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14/11/12 Q3 Financial Results and Conference Call Details
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20/11/12 Notification of Transactions of Directors/Persons Discharging
Managerial Responsibility and Connected Persons
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27/11/12 Notification of Transactions of Directors/Persons Discharging
Managerial Responsibility and Connected Persons
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07/12/12 Notification of Transactions of Directors/Persons Discharging
Managerial Responsibility and Connected Persons
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21/12/12 Total and CNODC Farm-in to Tethys' Tajikistan Assets
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31/01/13 Tethys Doubles Gas Price in Kazakhstan
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28/02/13 Tethys Extends Kul-Bas Contract in Kazakhstan
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02/04/13 2012 Annual Results and Operations Update
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The above documents are available on the Company's website at:

http://www.tethyspetroleum.com/tethys/irindex.action

The following documents were submitted to the National Storage Mechanism and can be found here:

http://www.morningstar.co.uk/uk/NSM

The Annual Report for the period ended date 31 December 2011, which was submitted to the National Storage Mechanism on
30 March 2012 is available on the Company's website at:

http://www.tethyspetroleum.com/tethys/announReports.action

The Financial Statements and Management's Analysis and Discussion for the period ended date 31 December 2011, which was
submitted to the National Storage Mechanism on 30 March 2012, is available on the Company's website at:

http://www.tethyspetroleum.com/tethys/announReports.action

2. The following announcements were made during the period to the Toronto Stock Exchange via SEDAR.

Announcements made during the period were:

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15/05/12 Q1 Financial Results and Conference Call Details
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16/05/12 Kazakhstan Oil Resource Upgrade
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16/05/12 New Oil Field Acquired in Uzbekistan
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29/06/12 Tethys Secures Loan Facility Provided by a Kazakh Bank
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09/07/12 New Director Appointed
----------------------------------------------------------------------------
11/07/12 Appointment of Tethys Vice Chairman to Uzbek-British Trade &
Industry Council
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19/07/12 Tajikistan Resource Upgrade 27.5 Billion BOE
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30/07/12 New CEO and Chairman of Tethys Appointed
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14/08/12 Q2 Financial Results and Operations Update
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10/09/12 Organisational Changes
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10/09/12 Operations Update
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18/09/12 Dr. David Robson to appear on BNN-Canada's Business News Network
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12/10/12 AKD07 in Kazakhstan Preliminary Results
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18/10/12 AKD07 in Kazakhstan to be Tested
----------------------------------------------------------------------------
26/10/12 Tethys signed MOU with an IOC to Acquire Interest in Tajikistan
PSC
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13/11/12 Operations Update
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14/11/12 Q3 Financial Results and Conference Call Details
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21/12/12 Total and CNODC Farm-in to Tethys' Tajikistan Assets
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31/01/13 Tethys Doubles Gas Price in Kazakhstan
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28/02/13 Tethys Extends Kul-Bas Contract in Kazakhstan
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02/04/13 2012 Annual Results and Operations Update
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The above documents are available at: http://www.sedar.com/

2.1 The following filings were made during the period onto SEDAR:

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15/05/12 Notice of Meeting
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15/05/12 Management Information Circular
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15/05/12 Form of Proxy
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15/05/12 Interim Financial Statements/Report
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15/05/12 MD&A
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15/05/12 52-109F2 - Certification of interim filings - CFO
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15/05/12 52-109F2 - Certification of interim filings - CEO
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25/05/12 Material Change Report
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14/06/12 Report of Voting Results
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27/06/12 Material Document
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27/06/12 Material Document
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27/06/12 Material Document
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27/07/12 Material Change Report
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03/08/12 Material Change Report
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14/08/12 Interim Financial Statements/Report
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14/08/12 MD&A
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14/08/12 52-109F2 - Certification of interim filings - CFO
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14/08/12 52-109F2 - Certification of interim filings - CEO
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23/08/12 MD&A (amended)
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23/08/12 Cover Letter
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23/08/12 52-109F1R - Certification of re-filed annual filings - CFO
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23/08/12 52-109F1R - Certification of re-filed annual filings - CEO
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14/11/12 Interim Financial Statements/Report
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14/11/12 MD&A
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14/11/12 52-109F2 - Certification of interim filings - CFO
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14/11/12 52-109F2 - Certification of interim filings - CEO
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28/12/12 Material Change Report
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05/02/13 Material Change Report
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28/03/13 ON Form 13-502F3B (Class 3B Reporting Issuers - Participation
Fee)
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28/03/13 Audited annual financial statements - English
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01/04/13 MD&A - English
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01/04/13 Annual information form - English
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01/04/13 52-109F1 - Certification of annual filings - CFO (E)
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01/04/13 52-109F1 - Certification of annual filings - CEO (E)
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01/04/13 Notice of filing of 51-101 F1 Information (Form 51-101 F4)
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The above documents are available on the Company's website at:

http://www.tethyspetroleum.com/tethys/announReports.action

3. Announcements which were made during the period to the Kazakhstan Stock Exchange can be located here:

http://www.kase.kz/en/emitters/show/GG_TPL_#section-7

For more information please contact:

North America Europe

Sabin Rossi Veronica Seymour
Vice President Corporate
Vice President Investor Relations Communications
Office: +1 416-941-1257
Office: +44 1481 725911
+1 416-947-0167 (FAX)
+44 1481 725922 (FAX)

Corporate Brokers:

FirstEnergy Seymour Pierce
Hugh Sanderson / David Van Erp Richard Redmayne / Stewart Dickson
Office: + 44 207 448 0200
Office: +44 207 107 8000

Asia Pacific: Quam IR FTI Consulting

Anita Wan Ben Brewerton / Natalia Erikssen
Office phone/fax: +852 2217 2999

Office: +44 207 831 3113

info@tethyspetroleum.com

Web: http://www.tethyspetroleum.com

Mobile site: m.tethyspetroleum.com

Notes to Editors:

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 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, 2012 for a description of risks and uncertainties relevant to our business, including our exploration activities (which are incorporated herein by reference). 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.

Contact: Tethys Petroleum Limited