Return to Session Menu DYNAMIC POSITIONING CONFERENCE October 9-10, 2012 ARCTIC/ICE OPERATIONS SESSION DYPIC A Multinational R&D Project of DP Technology in Ice Peter Jochmann DYPIC Coordinator Hamburg Ship Model Basin
DYPIC A Multi-National R&D Project on DP Technology in Ice MTS DP 2012 October 9-10th, 2012, Houston, Texas USA Peter Jochmann DYPIC Coordinator On behalf of the DYPIC Partners
Presentation Content Introduction of Project Partners and Sponsors Objectives Project Structure Content t and Results of Work Task Model Tests Phase I Managed Ice Customized DP System for Model Basin Model Tests Phase II Conclusion 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 2
DYPIC MARTEC ERA-NET Project 7 th Framework Program 6 partner from 3 countries Duration 3 Years January 2010 to December 2012 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 3
DYPIC MARTEC ERA-NET Project 7 th Framework Program funded by the national governments Total Budget: 2.39 Mill. Total Grant: 1.48 Mill. Partner Contribution: 0.91 Mill. 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 4
Motivation Ongoing Developments in Arctic Regions Intensified Exploration of Oil and Gas Development of Oil and Gas Fields in Deeper Ice covered Waters DP System for Ice Model Tests allows Determination of Station Keeping Capability during an early stage of the Vessel Development 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 5
Background Arctic Oil and Gas Reserves 13 % of undiscovered Oil 30% of undiscovered Gas USGS 2008: Estimates of Undiscovered Arctic Oil and Gas 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 6
Background Arctic Sea Ice State in 2012 as reported by NSIDC 2012 year of lowest ice extent Decrease of multi-year ice Decrease of first year ice thickness 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 7
Background DP Operations in ice will be a future necessity Oil and gas exploration and production move into deeper waters Concept moored and/or DP with/without ice management support There is a need to firstly prove the applicability of automated DP and then to enhance its performance in ice 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 8
Project Layout Benchmark and Acceptance Test of DP System Development and Fabrication of a DP-System for Ice Model Testing Development of a Numerical Ice Model Definition of Characterization of Impact of Ice Scenarios State-of-the-Art the Application Needs on Station Keeping 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 9
State of the Art 1991/6 Int. Arctic Ocean Exp. 1999 First DP operation 2004 ACEX IODP 2005/6 SHALDRIL I/II 2008 Kanumas Learning from full scale expeditions: Current open water DP system lack ability of automatic control in ice Most critical scenario when ice drift speed tend to zero and drift direction changes Ice management (detection, tracking, forecasting) is crucial to ensure success Allowable offset due to great water depth was recognized as a key to success of IODP Expedition 302 ACEX Nozzle thrusters give extra force in low speed operations and are contributing to better station-keeping ti i capabilities 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 10
Ice Scenarios Ice Scenario Model Test Condition Remark Level ice yes H = 75 cm Only Drillship tested Managed ice yes Different PRV and ADS tested Pack ice no To be investigated Ridges no To be investigated Iceberg no To be investigated Phase 1 model tests were performed only in managed ice Phase 2 model tests were performed in managed ice and in level ice 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 11
Model Test Program Phase 1 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 12
Model Test Concept Phase 1 Free Floating Test Different Heading Angles Oblique Towing Test Different Heading Angles o Heading by Generic DP System o Const. Heading by Rotary Table o 6 DOF o 1 DOF (Heave) o Propeller Wash o Acting External Forces Measured o Acting External Forces Calculated from Measured System Thrust 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 13
Test Set-Up Fixed Mode - Oblique Towing - Adjustable Heading Angle 5 Steps Model Fixed in 5 DOF but free to Heave Forces and Moments determined d by 6-Component Scale 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 14
Test Set-Up Free Floating Mode - DP Controlled - Model under control of a generic DP system o Station Keeping Mode o Constant Heading Angle Model free to move in 6 DOF Photo: Trond Isaksen - Statoil Acting forces calculated from azimuth propeller thrust 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 15
Test Matrix - Ice Fields Tested (Target Values; FS) Field 1 IC= 9/10 LFloe= 15/30/45 m Field 2 IC= 7/10 LFloe= 15/30/45 m Field 3 IC= 7/10 LFloe= 7.5/15/22.5 m Field 4 IC= 9/10 LFloe= 7.5/15/22.5 m 1 2 3 4 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 16
Managed Ice Preparation Cutting Plan 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 17
Managed Ice Preparation Initial Ice Sheet Step 1 Step 2 0 12 62 72 Step 3 Step 4 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 18
Managed Ice Cover 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 19
Managed Ice Documentation stitching Example of Analysis Results of the whole basin test area Preparation of Photos for Image Analysis 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 20
DP System Layout 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 21
Customized DP System for Model Testing Arctic Polar Drill Research Ship Vessel 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 22
Customized DP System for Model Testing Several menus and status information are available Intuitive system control Data displayed are either full or model scale 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 23
Sample Results Heading changes with drill ship model Pos North [m] ] 5 4 3 2 1 0-1 -2-3 -4-5 6 5 4 3 2 1 0-1 Pos East [m] -2-3 -4-5 -6 10 Ship Set Point Circle of 5m 5 eg] [de [m] [m] 0 2 0-2 2 0-2 Heading 1000 2000 3000 4000 5000 Time (s) Pos North 1000 2000 3000 4000 5000 Time (s) Pos East 1000 2000 3000 4000 5000 Time (s) [% %] [%] [%] 30 20 10 std : = 0.14deg, median = -0.03deg 0-0.4-0.2 0 0.2 0.4 Heading ( ) std : = 0.91m, median = 0.08m 15 10 5 0 15 10 5-1 0 1 2 X(m) std : = 1.41m, median = -0.27m 0-3 -2-1 0 1 2 3 Y (m) Heading X-Axis Y-Axis Heading changes with research vessel model Pos North [m] 5 4 3 2 1 0-1 -2-3 -4-5 6 5 4 3 2 1 0-1 Pos East [m] -2-3 -4-5 -6 Ship Set Point Circle of 5m [deg] [m] [m] 10 5 0 4 2 0-2 -4 2 0-2 Heading 500 1000 1500 2000 2500 3000 3500 Time (s) Pos North 500 1000 1500 2000 2500 3000 3500 Time (s) Pos East 500 1000 1500 2000 2500 3000 3500 Time (s) [%] [%] [%] 10 5 std : = 0.56deg, median = 0.09deg 0-1.5-1 -0.5 0 0.5 1 Heading ( ) std : = 1.56m, median = 1.00m 15 10 5 0-2 -1 0 1 2 3 4 5 X (m) std : = 1.63m, median = 0.85m 10 5 0-3 -2-1 0 1 2 3 Y (m) Heading X-Axis Y-Axis 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 24
Model Testing Phase II Test Setup 1 Arctic Drill Ship operating in level l ice, h=75cm, Totally wireless under DP control Ice drift direction controlled by DP Ice drift speed controlled by carriage 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 25
Model Testing Phase II Test Setup 2 Arctic Drill Ship operating in managed ice, h=75cm,c=9/10 Totally wireless under DP control Ice drift speed and direction controlled by main carriage 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 26
Model Testing Phase II Test Setup III Station Keeping Mode, Ice drift created by wind Model is placed in the middle of the basin Model is under full control of the DP System Ice is pushed by the main carriage 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 27
Summary & Conclusion A full scale DP System was successfully customized by DCNS/Sirehna for model testing in HSVA s ice model basin The DP System was tested for 2 vessel types, PRV and ADS, in level el ice and different managed ice conditions System enables check of station keeping ability regarding All kind of ice scenarios Operation strategies Vessel design Hull lines Propulsion system Further work should focus on DP strategy 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 28
Thank you very much for your attention 10/10/12 DYPIC - A Multi-National R&D Project of Dynamic Positioning in Ice - 29