The Hydrographic Society In Scotland
Sophie Salway
Geo Information Analyst
Shell Geomatics, Europe
Development Projects
Goldeneye Case Study
The Hydrographic Society In Scotland
GOLDENEYE
ST. FERGUS
• Gas Condensate Field
• Located in Outer Moray Firth, 100km NE of St Fergus Gas Terminals
• Low safety risks due to normally unmanned operations offshore
• Total lifetime production expected to be in excess of 500 Billion scf Gas and 17 Million barrels Condensate over a 10 Year period
• Greatest water depth (120 metres) in which a Jack-Up rig will be used for production well drilling
Goldeneye Case Study
The Hydrographic Society In Scotland
Project Timeline
Activity / Year 1 2 3 4 5 6 7 8 9 10 11
Exploration Seismic Acquisition
Interpretation
Exploration Drilling
Appraisal
Final Investment Decision
Concept Select
Route Survey + Site Investigation
Front End +Detailed Design
Offshore Construction
Development Drilling
Production Start Up
The Hydrographic Society In Scotland
• Geology and reservoir characteristics
• Restrictions (Legal, Environmental, Physical)
• Proximity to infrastructure
• Location of markets
• Technology
• Prevailing MetoceanConditions
Concept Select
The Hydrographic Society In Scotland
Construction Operations
• Pipe Lay – Shore Pull – Near shore / Offshore Operations
• Trenching
• Backfilling
• Platform Installation
• Tie-In and Pre-Commissioning Works
• Rock dumping – Crossings and Pipeline Protection
• Drilling Phase
The Hydrographic Society In Scotland
Survey Support for Construction Operations
• Pre-Award Survey Input
• Pre-Construction Survey Activities
• Landfall Preparation and Plant Construction
• Pipe lay Barge Navigation
• Tug Management
• Shore Pull
• Pipeline crossing
• Pipe lay down
• Trenching and Backfill for service line
• Heavy lift vessel positioning
• Acoustic positioning USBL or LBL of structures
• EDM (Total Station) positioning of structures
The Hydrographic Society In Scotland
Pre Installation Survey
• Ensures route / site is free of obstructions
• Side Scan Sonar and MBES
• ROV centre line / site visual survey
• Digital Terrain Model
• Route Topography Analysis
• Array visibility Analysis
The Hydrographic Society In Scotland
Pipe Lay
• Semi submersible pipe lay barge
• Deep and shallow water capability
• Dedicated pipe lay ramp
• Dual lay and piggyback lay
• Large diameter pipe lay capability
• Lay rate up to 7km/day
• Semi automatic welding system
• Self propelled vessel
• 12 point mooring system
The Hydrographic Society In Scotland
Decommissioning• Infrastructure Assessments
• Debris Surveys
• Identify dropped objects
• Pipeline depth of cover
• Well positions for P&A
• Rig move planning for P&A
• Environmental surveys
The Hydrographic Society In Scotland
Summary
• Pipe Lay – Shore Pull – Near shore / Offshore Operations
• Trenching
• Backfilling
• Platform Installation
• Tie-In and Pre-Commissioning Works
• Rock dumping - Crossings and Pipeline Protection
• Drilling Phase
• Decommissioning
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