SNG Canadian Superior Energy,

Canadian Superior Energy Inc. ("Canadian Superior", the "Company") (TSX: SNG) (AMEX: SNG) announced today that Canadian Superior, along with its partners, BG International Limited ("BG"), a wholly owned subsidiary of the BG Group plc (LSE: BG.L) and Challenger Energy Corp. ("Challenger") (TSX VENTURE: CHQ) (AMEX: CHQ), having drilled the "Endeavour" well offshore Trinidad to a depth of approximately 17,063 feet subsea in the final section of the well and into the main target zone for the well, have decided to re-drill the final section of the well with a mechanical sidetrack. Further drilling in the previously drilled final section is no longer practicable due to well bore damage that occurred during recent well control operations. Well control operations were initiated to manage an uncontrolled flow into the well that occurred during routine drilling operations while replacing a worn drill bit.

Speaking today, Mike Coolen, Canadian Superior's President & CEO, said, "The geological data obtained from the drilling to date of 'Endeavour' is very encouraging. When drilling was stopped to replace a worn drill bit, the data indicates that we had encountered, and were still drilling in, the main targeted zone for this well. Logging While Drilling ('LWD') data indicates that we have penetrated the main targeted zone; and, that the 'Endeavour' well has encountered approximately 162 feet of gross reservoir quality sands over a 168 foot interval to this point. While the data in hand is very useful; it is preferable to drill further into the main target zone to better determine the full extent of the reservoir and to obtain additional information, including full wireline logs, to further evaluate the various reservoir parameters and to have timely data in hand for forward scheduling of any possible appraisal work required. The sidetrack drilling is planned to start just as soon as the blowout preventer ("BOP") undergoes a necessary repair to allow drilling to proceed."

The "Endeavour" well was spudded on August 28, 2008 and has a planned approximate final total depth ("TD") of about 18,000 feet. The "Endeavour" well is being drilled by the Kan Tan IV semi-submersible drilling rig in about 1,000 feet of water, which also drilled the "Victory" and "Bounty" natural gas discovery wells on this block; and is the 3rd well, in an initial 3 well program, being drilled by Canadian Superior and its partners on the "Intrepid" Block, Block 5(c), located approximately 60 miles offshore, off the east coast of Trinidad. "Endeavour" is being drilled on a separate prospect determined from the analysis and evaluation of extensive 3D seismic on the "Intrepid" Block 5(c). Earlier this year, Canadian Superior announced two separate natural gas discoveries on Block 5(c); in the "Victory" well, announced on January 14, 2008; and, in the "Bounty" well, announced on August 13, 2008.

Daily Updates of drilling progress at "Endeavour" can be viewed on Canadian Superior's website www.cansup.com.

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.

Canadian Superior is paying 26-2/3% of the Block 5(c) exploration program cost to maintain a 45% working interest in Block 5(c), with its partners, BG International Limited, a wholly owned subsidiary of the BG Group plc, paying 40% for a 30% working interest and Challenger Energy Corp. paying 33-1/3% for a 25% working interest through Canadian Superior.

BG Group plc (LSE: BG.L) is a world leader in natural gas, with a strategy focused on connecting competitively-priced resources to specific, high-value markets. Active in 27 countries on five continents, BG Group has a broad portfolio of exploration and production, Liquefied Natural Gas (LNG), transmission and distribution and power generation business interests. It combines a deep understanding of gas markets with an excellent track record in finding and commercialising reserves. See www.bg-group.com for information on BG Group plc.

Challenger Energy Corp. is a Calgary, Alberta, Canada based oil and gas exploration company which is currently focusing on "high impact" oil and gas plays offshore Trinidad and Tobago. See www.challenger-energy.com for information on Challenger.

This news release contains forward-looking information, including estimates, projections, interpretations, prognoses and other information that may or relates to future production, resource potential and/or reserves, project start-ups and future capital spending. 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, estimates, projections, resource potential and/or reserves, interpretations, prognoses and/or estimated results could differ materially due to changes in project schedules, operating performance, demand for oil and gas, commercial negotiations or other technical and economic factors or revisions. This news release may contain the reference to the term "undiscovered natural gas resources", which are those quantities of natural gas estimated to be contained in accumulations yet to be discovered. There is no certainty that any portion of undiscovered resources (oil, natural gas, natural gas liquids or other hydrocarbons) will be discovered and that, if discovered, in this or any other discovery, the discovered resource may not be economically viable or technically feasible to produce.

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 Corporations' 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) Website: www.cansup.com Canadian Superior Energy Inc. Suite 3200, 500 - 4th Avenue S.W. Calgary, Alberta, Canada T2P 2V6