Longitude gets design role for latest WDDM subsea development offshore Egypt

Petroleum Marine Services (PMC) has contracted Longitude Engineering to perform detailed engineering and project management services for the Phase XI Deepwater Project of the West Delta Deep Marine (WDDM) concession.

Shell, via the joint venture Burullus Gas Co., operates the concession, which is about 90 km offshore northern Egypt in the northwestern Nile Delta region of the Mediterranean Sea.

WDDM included 17 discovered gas fields in water depths ranging from 300 m to 1,200 m. PMC is the EPIC contractor for the Phase XI project, which calls for the tie-in of three subsea twin deepwater natural gas wells.

Its work scope includes engineering, procurement, fabrication, installation and commissioning support for:

• Five subsea M-shape rigid jumpers, fitted with deepwater connectors, multiphase gas meters, and sand detection systems;
• Compact twin-well configurations (each subsea jumper spans about 25 m long), to be installed close to an existing deepwater gas pipeline system;
• A tie-in spool base, designed to accommodate multiple jumpers within a single subsea module. The intention is to provide enhanced production flexibility and allow for well allocation interchangeability; and 
• Subsea control system components to support well operation and chemical injection.

Longitude will manage detailed design of deepwater rigid jumpers, development of fabrication drawings, onshore and offshore handling procedures, offshore installation engineering, process and stress modeling, HSE studies and engineering workshops.

Longitude was previously involved in WDDM Phase X, which was awarded in January 2024.