Canadian Superior El Paso ``Mariner'' I-85 Well Site Operations Complete Rowan Gorilla V Jack-Up Towed To Halifax Harbour.

HALIFAX, Nova Scotia--(BUSINESS WIRE)--March 25, 2004

Canadian Superior Energy Inc. ("Canadian Superior") (AMEX: SNG)(TSX: SNG) reported today that all operations, including the permanent abandonment of the well bore, at the Canadian Superior El Paso "Mariner" I-85 well site have been completed and the Rowan Gorilla V jack-up drilling rig has been towed to Halifax. The Rowan Gorilla V rig, under tow, entered Halifax Harbour, Nova Scotia on Wednesday, March 24, 2004.

Speaking from Calgary today, Mike Coolen, Canadian Superior's Vice President and Director, East Coast Operations commented, "Operations on the Canadian Superior El Paso 'Mariner' I-85 well have been performed in a very safe and effective manner. Zero Lost Time Injuries and zero Environment Incidents/Spills occurred while drilling this challenging High Temperature High Pressure 5408 m (17,743 feet) well, in the middle of the harsh North Atlantic, this past fall and winter. All involved are to be complimented on their attention to safety and the environment; and also to cost, schedule and budget. At the appropriate time, as soon as possible, we will comment further on the 'Mariner' project, including, if possible, Partner Confidential information. We are pleased to report that our expenditure tracking indicates that the well costs have met budget expectations, within normal industry tolerances; and we are confident that the overall well cost will be lower than those of comparable High Temperature High Pressure wells in the area, in part due to the favourable service contracts that were negotiated for the well.

"We are proud of the work accomplished by the Canadian Superior El Paso Well Construction Team, including the many local, national and international vendors that have assisted us with this first 'Mariner' Project well. At this time, we wish to acknowledge the hard work and outstanding contributions made by the management and staff of several of our major contractors; the Drilling contractor, Rowan Drilling Companies, Inc.; the prime Helicopter contractor, CHC Helicopters International and the Vessel contractors, Atlantic Towing Limited, Karlsen Shipping Company and Secunda Marine Services."

Speaking further, Coolen said, "Interested parties should visit our website www.cansup.com, to listen to our March 15th WEBCAST, where we discuss the 'Mariner' I-85 well, the 'Mariner' Project and our further drilling plans relating to our offshore Nova Scotia."

The "Mariner" I-85 well is one of the deepest wells that will be drilled offshore this year in North America. The exploration well location is approximately 290 kilometers (180 miles) southeast of Halifax, Nova Scotia. Three excellent prospects have been identified for drilling on the "Mariner" block (EL 2409) utilizing high-resolution seismic. The block encompasses a total area of 101,800 acres and directly offsets five significant discoveries near Sable Island including the ExxonMobil Venture natural gas field. The "Mariner" well is a High Temperature High Pressure (HTHP) well and was drilled and evaluated utilizing the latest in proven drilling technology.

Canadian Superior is a Calgary, Alberta based oil and gas exploration and production company with operations in western Canada, offshore Nova Scotia and offshore Trinidad. The Company is one of the largest acreage holders offshore Nova Scotia, with interests in 1,293,946 acres offshore Nova Scotia (See: Canadian Superior's website at www.cansup.com to review Canadian Superior's "Marquis, Mariner, Mayflower, Marauder and Marconi Offshore Projects" and to view the "Table of Major Offshore Nova Scotia Acreage Holders" and "Offshore Nova Scotia Maps", to review information on the Company's Western Canadian operations and for information and detailed maps regarding Canadian Superior's new Trinidad "Tradewinds" Offshore Project).

Statements contained in this press 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 and other factors which may cause the actual results, performance or achievement of the Company, 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 Company's annual report on Form 40-F on file with the U.S. Securities and Exchange Commission. The Toronto Stock Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release.