Leo Gas Field

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USA Oil & Gas Fields

ENI Oil & Gas Fields

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Summary Information

  • Operator: ENI
  • Country: USA
  • Location: Mississippi Canyon Blocks 502, 503, 546 & 547, Gulf of Mexico
  • Production start:
  • Partners: ENI - 75%, Nexen - 25%
  • Type: Gas
  • Estimated Reserves:
  • Production Volume:


  • The field which is alternatively known as Longhorn, is located in 730 meters (2,400 feet) of water depth
  • Longhorn currently has four wells connected to an 8 slot manifold, with a 19-mile tieback to the Corral platform


  • UniversalPegasus: Detailed detailed engineering design services including: subsea, controls, umbilicals and flow-lines
  • Manatee: Subsea control system, umbilicals, subsea operating procedures, and created the B-MAP interactive manual for subsea and topsides operating procedures


  • 1986 - Leo Gas Field discovered
  • 1998 - Further successful appraisal wells drilled
  • 2008 - The development of Longhorn Phase II, sanctioned
  • 2009 - First gas produced



  1. Gulf Of Mexico Deepwater Natural Gas And Oil Qualified Fields
  2. Universalpegasus Subsea References
  3. Manatee Offshore References
  4. Spirit Energy 76 participates in deepwater discovery; first well in Leo prospect finds 200' of pay
  5. Eni starts development of the Longhorn gas field located in the Gulf of Mexico deepwater
  6. Eni sanctions two new projects in the Greater Longhorn Area
  7. Eni starts production of the Longhorn gas field, located in the Gulf of Mexico

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