SNG Canadian Superior Energy,

Canadian Superior Energy Inc. ("Canadian Superior" or the "Company") (TSX: SNG) (NYSE Alternext US: SNG) confirms that it has been advised by NYSE Alternext US LLC (the "Exchange" or "NYSE Alternext US") that it has reassessed its previous decision to halt trading in the Company's common shares, and that the shares resumed trading on the Exchange effective Wednesday, May 6, 2009. The Exchange stated that its decision to resume trading was based on its review of the Company's previously announced extension of CCAA protection by press release on May 5, 2009, and the filing of the Company's recently announced audited financial statements and related documents.

As previously announced, the Company's application of May 4, 2009 to the Court of Queen's Bench of Alberta for an Order under the Companies' Creditors Arrangement Act (Canada) ("CCAA") to extend its CCAA protection has been granted, allowing the Company to continue to prepare a plan of arrangement for its creditors, and staying all claims and actions against the Company and its assets. The extension under the Order granted will be in effect until June 4, 2009, at which time the matter will be reviewed by the Court.

Canadian Superior Energy Inc. is a Calgary, Alberta, Canada based diversified global energy company engaged in the exploration and production of oil and natural gas, and liquefied natural gas ("LNG") projects, with operations offshore Trinidad and Tobago, offshore Nova Scotia, Canada, in Western Canada, in the United States and in North Africa. See Canadian Superior's website at www.cansup.com to review Canadian Superior's operations in Western Canada, offshore Trinidad and Tobago, Offshore Nova Scotia interests, in the USA and its North Africa interests. Canadian Superior has approximately 20,000 shareholders worldwide, including some of the top institutional shareholders in North America.

This news release contains forward-looking information, including the potential sale of assets, the implementation of a plan of arrangement, and further Court review of CCAA proceedings. Forward-looking information contained in this news release is as of the date of this news release. The Company assumes no obligation to update and/or revise this forward-looking information "except as required by law". Actual results could differ materially due to the results of commercial negotiations with relevant parties.

Statements contained in this news release relating to future results, events and expectations are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements involve known and unknown risks, uncertainties, scheduling, re-scheduling and other factors which may cause the actual results, performance, estimates, projections, resource potential and/or reserves, interpretations, prognoses, schedules or achievements of the Corporation, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such statements. Such factors include, among others, those described in the Corporation's annual reports on Form 40-F or Form 20-F on file with the U.S. Securities and Exchange Commission.

Contacts: Canadian Superior Energy Inc. Investor Relations (403) 294-1411 (403) 216-2374 (FAX) Canadian Superior Energy Inc. Suite 3200, 500 - 4th Avenue S.W. Calgary, Alberta, Canada T2P 2V6 Website: www.cansup.com