Mandy Development/Matterhorn TLP

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Mandy Development & Matterhorn TLP

Mandy Development-Matterhorn TLP | Audubon Companies


LLOG Exploration & W&T Offshore


Gulf of Mexico, MC-199 and MC-243

Project Summary:

Audubon provided topsides engineering support and modifications to W&T Offshore’s Matterhorn TLP production system. We also integrated the production system with LLOG Exploration’s Mandy development and topsides equipment.

Modifications to the topsides facilities were completed to receive, separate, and meter production on the Mandy prior to merging with production at Matterhorn. Our engineering, design, and installation services supported two risers that tied back to three Mandy wells and combined a four-slot subsea manifold prior to flowing to the Matterhorn TLP.

Project Overview:

  • Brownfield topsides modifications
  • Deepwater floating installation
  • ABS interface for safety systems expansion
  • Additional Mandy development capacities:
    • 20,000 BOPD
    • 12 MMSCFD
  • Mandy development : 2,446 ft. water depth, MC-199
  • Matterhorn TLP: 2,789 ft. water depth, MC-243

Scope of Work:

  • Specification &design of the Mandy production systems
  • Removal of existing equipment & piping
  • Expansion of the fire, water, & safety system
  • Design for capacity of existing topside systems to support Mandy production
  • Integration of Mandy subsea equipment with Matterhorn topside systems
  • ABS & USCG permitting support
  • Design of a temporary deck extension &installation plan