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Mandy Development- Matterhorn TLP

Location: Gulf of Mexico (GOM), MC-199 and MC-243

Client: LLOG Exploration & W&T Offshore

Mandy Development-Matterhorn TLP | Audubon Companies

Audubon Companies provided topsides engineering support and modifications to W&T Offshore’s Matterhorn TLP production system and integrated the system with LLOG Exploration’s Mandy development and topsides equipment. Topsides facilities modifications were completed to receive, separate, and meter Mandy production prior to commingling with existing Matterhorn production. Our engineering, design, and installation services supported two risers to tie back three Mandy wells that were combined into a 4-slot subsea manifold prior to flowing to the Matterhorn TLP.


  • Brownfield Topsides Modifications
  • Deepwater Floating Installation
  • ABS Interface for Safety Systems Expansion
  • Additional Mandy Development Capacities:
    • 20,000 BOPD
    • 12 MMSCFD
  • Mandy Development – in 2,446 ft of water, MC-199
  • Matterhorn TLP – in 2,789 ft of water, MC-243


  • Specification and Design of the Mandy Production Systems
  • Removal of Existing Equipment and Piping
  • Expansion of the Fire Water and Safety Systems
  • Design for Capacity of Existing Topside Systems to Support Mandy Production
  • Integration of Mandy Subsea Equipment with Matterhorn Topside Systems
  • ABS and USCG Permitting Support
  • Design of a Temporary Deck Extension and Installation Plan

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