SNG Canadian Superior Energy,

Clean, Safe and Efficient JERSEY CITY, N.J., May 20 /PRNewswire/ -- Excalibur Energy (USA) Inc., a 50/50 joint venture company between Canadian Superior Energy Inc. ("Canadian Superior") (TSX: SNG) (AMEX:SNG) and Global LNG Inc., a New York based privately held company, announced today the launch of its $550 million Liberty Natural Gas Transmission Project ("Liberty Natural Gas") as a new source of natural gas to meet the growing energy demands of the Northeast region. Liberty Natural Gas will be a deepwater pipeline system that receives gas fifteen miles offshore New Jersey, which subject to regulatory approvals, is expected to begin to deliver up to 2.4 billion cubic feet per day of natural gas by late 2011. Speaking in Jersey City today from Excalibur's head office, Roger Whelan, President and Chief Executive Officer of Excalibur, said, "We are launching our Liberty Natural Gas Project to meet the growing energy needs of the Northeast US by delivering clean, safe and efficient natural gas to New Jersey without compromising safety or the clean waters off the Jersey shore. We will not create any unsightly infrastructure visible from the shore. Energy shortages will occur over the next few years unless new energy supplies are provided before 2012. The US Energy Information Administration projects that the region's growing population will need an additional 30% more energy in the coming decades relative to the current demand, with energy shortfalls beginning as soon as 2012. On shore, Liberty Natural Gas would reach consumers through existing or expanded natural gas infrastructure." Whelan further commented, "We believe the Liberty Project is the energy project of choice and has the public's concerns in mind. Our Liberty Project has been developed over the last two years and included an independent survey of 1,000 New York and New Jersey residents and discussions with several key stakeholders in the area. We believe we have identified the optimal low impact energy supply solution for the Northeast region." Whelan continued, "Liberty Natural Gas has been planned with great care for the air, greenhouse gases, the water, marine life, and equally important, the safety of our workforce and local residents in the region. This project is essentially an offshore pipeline which will provide approximately $550 million of new investment and needed jobs in the New Jersey area to provide the area with clean, safe and efficient energy. There are about 190,000 miles of onshore and offshore interstate gas pipelines in the US; so, our approach is not groundbreaking in the use of natural gas, but rather how we safely reach this rapidly growing and important market to the US using a simple design. Liberty Natural Gas is a bellwether project for the region. Excalibur's management has a full complement of natural gas development and commercial structuring experiences and the integrated team that we have assembled for this project is one of the best, if not the best in the Nation." 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, obtaining regulatory approvals and other factors which may cause the actual results, performance, estimates, projections, 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 Canadian Superior's regulatory filings and annual reports on Form 40-F or Form 20-F on file with the U.S. Securities and Exchange Commission. EXCALIBUR'S LIBERTY NATURAL GAS PROJECT FACT SHEET 1. The Project consists of a fully-submerged, offshore gas importation turret anchored to the seafloor 15 miles off the coast of New Jersey, fifty miles of 36" offshore pipeline, a directionally drilled underground shoreline approach near South Amboy, and eleven miles of onshore pipeline in an existing industrial corridor to Linden, New Jersey, where the pipeline interconnects with existing gas pipelines. 2. Gas transmission in the Linden, New Jersey, area totals more than 4 billion cubic feet per day. 3. The project, expected to cost $550 million, will have the capacity to provide up to 2.4 billion cubic feet per day of natural gas and be ready by late 2011, will not include any permanent floating vessels or artificial land masses or rotating structures or storage facilities. 4. Excalibur will submit the necessary government and regulatory applications in early 2009. 5. In 100 feet of water 15 miles offshore New Jersey, Liberty Natural Gas will receive its supply of imported gas through liquefied natural gas ("LNG") transport ships. These ships will temporarily connect to permanently anchored turrets. The LNG will be re-gasified to ambient temperatures onboard the ships and pumped through the turrets into the pipeline. There will be no visible structures from the shoreline, including the LNG ships that are temporarily connected. 6. The natural gas offloading is accomplished using a closed loop regasification system and marine life will not be subjected to any temperature variances associated with the process. Also, the seabed will only be disturbed during the installation of the pipeline. Environmental impact surveys and route selection studies to minimize this temporary impact are ongoing. FOR FURTHER INFORMATION CONTACT: CAPITAL PUBLIC AFFAIRS, INC. Steven E. Some - Jon R. Bombardieri Three Mapleton Road Princeton, NJ 08540 (609) 514-2600 office (609) 933-5385 mobile DATASOURCE: Excalibur Energy (USA) Inc. CONTACT: Steven E. Some or Jon R. Bombardieri, both of Capital Public Affairs, Inc., +1-609-514-2600 office, +1-609-933-5385 mobile

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