Development of Floating Exploration & Production Solutions for Remote and Arctic Environments

Transcription

1 Development of Floating Exploration & Production Solutions for Remote and Arctic Environments Intsok Seminar Recent Advances in Offshore Technology St. John s, Canada 1 October 2014 Jan Korsnes, VP Floating Production

2 Contents Introduction Arctic areas & resources Challenges to Arctic developments Ice management Floating exploration & production platform solutions for Arctic environments Winterization design Technology gaps

3 Moss Maritime Company Profile Engineering, product development Moss Maritime is a leading designer and provider of licensed technology for innovative floater designs for both exploration and production facilities and for solutions within the LNG industry Frontier and Technology Advanced Projects Exploration and production floater solutions and concepts for harsh and Arctic environments Early Involvement with Clients In early engagement in conceptual and field development studies Global EPC general contractor Targeting challenging and technological advanced projects Emphasis on maximizing local presence and content Superior capabilities for harsh, remote and difficult environments Floaters Offshore Onshore Drilling Feasibility Studies Concept selection, New Technology Project Definition Basic Design, FEED EPC Installation Commissioning Operation Moss Maritime Saipem

4 Moss Maritime Arctic Floater Solutions Arctic Production Units moss Arctic Disconnectable FPSO/FPU moss Octopus FPSO Ice Good open water sea keeping performance Good motion characteristics in open water Ice breaking bow and stern Axis symmetrical hull Severe ice conditions (high ice thickness, large ice ridges) Disconnectable risers and mooring system Excellent underwater ice transport No need of turret Moderate to severe ice conditions Winterized topside design Winterized topside design

5 Moss Maritime Arctic Floater Solutions Arctic Exploration & Drilling Units moss CS50 Arctic Shallow Deep waters (30 1,500 m) moss Arctic Drillship Shallow Deep waters (50 1,500 m) moss Octopus Drilling Ice Shallow Deep waters (30 1,500 m) Light ice conditions (ice flows) and/or seasonal drilling Remote location, severe ice conditions and year around drilling Light to medium ice conditions and/or seasonal drilling Ice protected mooring equipment, ice protection of risers etc. Two units delivered to Gazflot (Polyarna Zvezda & Severnoe Syanie) Icebreaking capabilities Concept design based on development of Shtokman FPU Axis symmetrical hull

6 Moss Maritime Arctic Floater Solutions Arctic LNG and Service Vessels moss Arctic LNG Carrier Spherical Moss LNG containment system for icebreaking operations Documented through several technological studies Ramming during icebreaking operations Vibrations during icebreaking collisions with iceberg moss 808 moss Icebreakers 3 vessels delivered Combined anchor handler and icebreaking support vessel moss 828 MISV 2 vessels delivered Multipurpose icebreaking service vessels

7 Arctic Geographical Regions Different geographical regions different environmental impacts and challenges

8 Challenges to Arctic Developments Arctic resource development and operation is both high cost and high risk: Technical challenges Harsh environment (extreme temperatures & darkness) Mechanical (steel brittleness) and freezing liquids (drain systems, fire water systems, cooling water systems etc.) Working environment (heating, shielding, etc.) & Evacuation (heli deck, life boats, escape routes) Ice loads from sea ice/drifting ice floes & ice bergs Global and local load effects Ice management Remoteness Limited or no infrastructure Logistical challenges Sensitive environment Long project lead times Country specific laws and regulations Political stability/predictability Economic sovereignty claims

9 Ice Management Objectives of ice management: Detection and evaluation of potential ice threats and prediction of ice features Alerting the floating installation Reduce ice loads on facilities in case of sea ice breaking and clearing Avoid ice actions in case of iceberg deflection Facilitate re connection in ice Assist EER in ice if needed

10 Ice Management Ice management philosophy must be established prior to concept selection Comprehensive use of ice management is considered a key factor for creating an operational environment for Arctic offshore floaters Key challenge: How can the effect of ice management systems be incorporated in design of offshore structures? Load levels without ice management Disconnection Effect of ice management Disconnection Level of ice loads Design ice load level Level of ice loads Ice management Design ice load level? Time Time

11 Disconnectable Floating Production Unit Technical challenges for Arctic floater design: Robustness to meet harsh Arctic environment Sea keeping performance Hull design for ice infested water (ice breaking/ice vaning capabilities) Winterization/topside design against sea spray and atmospheric icing Disconnection and re connection Remoteness Safety and rescue Large topsides Durable materials and minimum maintenance Offloading

12 Moss Arctic Disconnectable Floating Production Unit Why select a ship shaped floating production unit? FPU Ice load: tonnes Hull weight: 45,000 tonnes Spar Ice load: 10,000 15,00 tonnes 16 mooring lines 36 mooring lines Hull weight: 60,000 tonnes Simple disconnecting and reconnection feature (proven solutions) Easy access to disconnecting part Efficient relocation and return to field using own propulsion Ample and flexible topside load capacity and deck space for process equipment Offshore Storage of Processed Products Design flexibility (e.g. in case of expansion and/or upgrading requirements) Quay side integration and commissioning Availability of a number of fabrication yards for hull & topside modules easier to fulfil significant local content requirements

13 Moss Arctic FPU Hull Design Technology Development Hull form characteristics Designed for Shtokman conditions: Icebreaking bow and stern Sloped sides in ice belt Turret fwd of parallel mid body Deep draft Excellent underwater ice transport Performance in Ice: Icebreaking capability superior to the most powerful existing nuclear icebreakers and excellent ice vaning capability Can passively turn in ice drift reversal scenarios without icebreaker assistance Several ice Model tests performed at KSRI and HSVA

14 Disconnectable turret design Turret design challenges: FPU being able to stay connected in severe ice conditions Risers to be protected against ice damages Very short emergency disconnection time

15 Moss Arctic FPU Winterization Philosophy : Personal protection equipment to crew members to ensure their health, safety and performance Technical design as a means of eliminating or reducing cold climate effects to the greatest extent possible Operational procedures to reduce undesired effects and ensure a safe and reliable operation of the unit Winterization design challenges: Wind chill effect caused by low temperature and wind Enclosed spaces Power demand Ice and snow loads (dropped ice, slippery surfaces) Drain systems

16 Moss Arctic FPU Winterization Shelter concept Developed for Shtokman: Active panels maintain sufficient natural ventilation Protect operators from cold wind & snowfall Manage risk of overpressure in case of blast

17 Arctic Floating Exploration and Drilling Units moss Arctic CS series A proven solution for Arctic Conditions Several recent studies for Oil majors Different Arctic regions Very shallow to mid water depth s ( m) Light ice conditions (ice flows) Extended seasonal drilling

18 Arctic Exploration and Drilling Semisubmersible Units Technical challenges and development for extended seasonal drilling units: Hull design and General layout Manage ice conditions (ice flows), ice class and design temperatures Ice protection of risers & mooring equipment Station keeping system Disconnection/reconnection Drilling & Subsea systems

19 Arctic Exploration and Drilling Semisubmersible Units Key advantages of Arctic drilling semisubmersible unit: Capable of operating in light to moderate ice conditions with active ice management Good shallow water capability Proven operability in harsh open water environment can work off season in other regions Unit optimized for maximum drilling efficiency Existing moss CS50 Arctic drilling semisubmersible units: Severnoye Siyanie (Northern Light) Polyarnaya Zvezda (Polar Star)

20 Technology Gaps For Arctic Exploration & Production Structures Environmental protection Environmental data Statistical data (Wind, temperature, sea conditions) Environmental Protection Essential Ice data prediction Ice effects and ice management technology Characterization and mechanical properties of ice and ice structure interaction Environmental data Ice effects Winterization Stationkeeping in ice Ice management Arctic drilling R&D can reduce gaps and uncertainties Development can significantly impact future development Models and methods to calibrate/establish ice loads Evacuation & rescue Disconnection & reconnection Existing design codes do not provide clear recommendations regarding how to include effects of ice management Escape, evacuation and rescue technology CONCLUSION: The industry still needs new technology to be developed in order to bridge technology gaps and thus reduce development costs and risk

21 Thank You!