Medusa (MC582) - Murphy

Medusa (MC582) - Murphy Oil and Gas Asset Profile

Location

The Medusa oil and gas field is located in the Federal offshore waters of the United States, specifically in the Mississippi Canyon protraction area of the Central Gulf of Mexico. The exact coordinates are 28.3935, -89.4665, and it is situated approximately 100 miles south of New Orleans in water depths of around 2,223 to 2,485 feet.

Project Details

• Operator: Murphy Exploration & Production Company, a subsidiary of Murphy Oil Corporation.
• Ownership: Murphy Oil Corporation holds a 60% working interest, Agip Petroleum Co. Inc. (an affiliate of ENI SPA) holds 25%, and Callon Petroleum Co. holds 15%.
• Discovery Year: 1998.
• First Production: November 2003.

Infrastructure

The Medusa field is developed using a truss spar floating production facility.

• Spar Platform: The platform was designed, fabricated, and installed by J. Ray McDermott SA (a subsidiary of McDermott International Inc.). The hull is 586 feet long, 94 feet in diameter, and weighs over 12,800 tonnes. The topsides, weighing over 6,000 tonnes, were prefabricated in subassemblies at McDermott's facility in Veracruz, Mexico, and assembled and outfitted at the Harbor Island facility near Corpus Christi, Texas.
• Installation: The spar was installed using Derrick Barge 50 and the Shearleg crane.

Production and Reserves

• Production Capacity: The Medusa field is capable of producing 40,000 barrels of oil per day (b/d) and 110 million cubic feet of natural gas per day (MMcfd).
• Cumulative Production:
  • As of 2019, the field had produced 72.3 million barrels of oil and 2,290.81 million cubic meters of gas.
  • Annual production rates as of 2020 were 0.99 million barrels of oil per year and 26.98 million cubic meters of gas per year. By 2022, these rates had adjusted to 0.66 million barrels of oil per year and 24.2 million cubic meters of gas per year.
• Remaining Reserves:
  • As of 2019, the remaining reserves were estimated at 13.9 million barrels of oil and 370.95 million cubic meters of gas.

Field Development

• Initial Producers: The field was developed with six initial producers.
• Subsea Tie-back: The W&T-operated Gladden (MC 800) field was developed as a subsea tie-back to the Medusa spar, coming online in late February 2011.

Economic and Operational Outlook

• Production Life: Based on economic assumptions, production from the Medusa field is expected to continue until it reaches its economic limit in 2027, having recovered approximately 98.14% of its total recoverable reserves by that time.
• Capital and Operating Costs: Detailed cost analyses, including capital costs pre-2011 to 2019 and operating costs from 2024 to 2030, are available in more comprehensive reports.

Additional Information

• Regulatory Compliance: The project adheres to the regulatory guidelines set by the US Department of the Interior's Minerals Management Service, including requirements for exploration plans and development operations coordination documents.