Offshore wind foundations design, installation and monitoring

Transcription

1 Offshore wind foundations design, installation and monitoring Innovation Day Clean Energy Seminar, Innovation Norway 28 September Millenium Hilton Seoul Yunsup Shin, Per Sparrevik Norwegian Geotechnical Institute (NGI)

2 Trondheim Oslo (HQ) Paris Houston NGI - Private independent foundation Established 1953 R&D and consultancy work National and international clients Cooperation with universities and research institutes Key figures No. of employees = 250 worldwide Around 35 nationalities Turnover = 430 million NOK 6 % from Norwegian Research Council About 1/3 Offshore Energy Kuala Lumpur 2009 (JV with G & P) Perth

3 History - projects Subway and railway through Oslo center Quick clay and slides Dams and power generation facilities Development of DSS Oil and gas adventure in Norway Establish and develop snow avalanche centre at Strynefjellet Development of the Q-method Develop geo-environmental technology Gullfaks C platform Tragic snow avalanche in Vassdalen

4 History projects Environmental work at Hærøya New OSL Gardermoen airport Snorre and Troll A platforms Suction anchor technology Lærdal road tunnel world s longest Ormen Lange - Storegga EM technology - EMGS Tsunami research Under water deposit in Oslo harbour 2010-now Large developments in offshore wind Reliability based design

5 Integrated ground model, Barents Sea Nearshore SI and design, Russia Geohazard site investigation, offshore Newfoundland Offshore windfarm, Maryland Numerous windfarms, North Sea Pile and anchor design, Norwegian Sector EQ and pipeline design, Azerbaijan Gas Hydrates, Black Sea Geohazard study, Gulf of Mexico Suction pile design, Egypt Anchor trenching studies, West Africa Jackup Assessments, Qatar Windfarm R&D study, Korea Offshore client support, India Manifold Design, Indonesia Geohazard Study, Brazil Geohazard study, East Africa Anchor Design, Australia Jetty and breakwater design, Uruguay Selected NGI projects worldwide last 12 months

6 Exploration Field planning Project development Part 1 Drilling hazards Geophysics Jack-ups Decomissioning Geohazard evaluation Integrated geomodel Site investigations Pipeline routing Offshore project life cycle NGI services Life extension Foundation design Pipelines and subsea Anchoring Seismic design Part 2 Operation Installation Suction anchors Piled foundations Pipelines Instrumentation Trenching Removal Re-use Foundation assessment Performance increase Mooring integrity Reliability based design Operational monitoring Shallow gas Conductor/riser performance

7 Part 1: Offshore wind foundations design Monopile foundation GBS foundation Bucket foundation/anchor Jacket foundation Others

8 Offshore foundation Monopile foundation

9 Monopiles NGI experience NGI optimising monopile design Track record of projects for major operators, including London Array, Anholt, Dudgeon Refined and efficient 3DFEA to calibrate analytical models Reliable modelling of cyclic response in sand, clay and chalk Large scale field testing of monopile installation and lateral response

10 Offshore foundation GBS foundation Generally governing for overall dimensions and weight

11 Ekofisk tank GBS NGI experience Dolwin 2 GBS First Offshore CPT in 1972 with NGI Troll A 16 concrete platforms Soil Investigation Lab testing Soil properties Foundation design Instrumentation

12 Offshore foundation Suction caisson

13 Timeline for evolution of suction anchors Permanent Suction anchors installed Water depth (m) Fixed platforms Gullfaks C Penetration test Snorre TLP Draupner jacket N'Kossa Troll GBS platform Floaters and subsea Njord/ Visund Aquila FPSO Marlim Semi/FPSO Hanze/ Ardmore Åsgard A &B Bonga Trent Northwest gateway Offshore wind? Diana GoM Girassol Horn mountain Nakita GOM Thunder horse Year

14 Suction caisson NGI experience Snorre model tests Jackets, tripods and monopods: Efficient foundation design Low-noise installation Track record in oil and gas sector (Sleipner, Draupner..) First installation for offshore wind turbine (Borkum Riffgrund) designed by NGI Pull-out (or push-in) failure Calculated Measured

15 Suction anchors Hywind Scotland Proven offshore anchoring technology pioneered by NGI and Statoil in the 1990s NGI performed FEED and detailed suction anchor design as well as advanced laboratory testing Installation in years of experience, competence and quality

16 Jacket foundation NGI experience Offshore piles for jackets: Full geotechnical design for concept, FEED and detailed design 3D FEA modelling of piles and pile groups to capture foundation performance Reliability-based design to improve understanding of risk

17 Site investigation NGI a reliable partner from the first day of your project Fully integrated and comprehensive project teams in geotechnics, geology and geophysics Leading the way with R&D application in projects

18 Marine Geohazards and earthquakes Geohazard site assessment Hazard mapping Integration of geophysics, geotechnics, geology Slope stability and debris flows Pipeline route optimisation Drilling hazard assessments Seismic response and EQ design Probabilistic seismic hazard assessment Site response analyses Dynamic soil-structure interaction Liquefaction

19 Advanced laboratory testing High quality and capacity: Triaxial testing (CAU, K0, small strain) Direct simple shear (DSS) Oedometer (IL and CRS) Cyclic testing Resonant column Ring shear Schmertmann Research Laboratory

20 Analysis solutions NGI market s broadest and most flexible array of analysis solutions for optimal design NGI s «DNA» = fundamental understanding of soil behaviour, including cyclic response Always «fit for purpose», everything from hand calculations to advanced 3D FEA with non-linear soil models Unique combination of optimised soil models and efficient analysis to provide accurate and good value