Into Deepwater and Back Again: New Challenges for Current Profile Characterisation Dr Gus Jeans Oceanalysis Ltd
Into Deepwater and Back Again New Challenges for Current Profile Characterisation A key input to offshore energy projects: 1. Shallow water oil and gas 2. Deepwater oil and gas 3. Shallow water renewables ISO_19901 1 A.9.3
Prevosto et al (2012). Worldwide Approximations of Current Profiles For Steel Riser Design. OMAE2012 83348
Worldwide Approximations of Current Profiles Numerical Model Review Prevosto et al (2012). Worldwide Approximations of Current Profiles For Steel Riser Design. OMAE2012 83348
Deepwater Current Profile Data Sources The HYCOM Model http://hycom.org/dataserver
Deepwater Current Profile Data Sources Offshore Brazil Model (20m depth) and Measured (23.5m depth) Daily Current Speed Model (800m depth) and Measured (800m depth) Daily Current Speed Jeans et al (2012). Deepwater Current Profile Data Sources for Riser Engineering Offshore Brazil. OMAE2012 83400
Deepwater Current Profile Data Sources Offshore West Africa Jeans et al (2013). Deepwater Current Profile Data Sources for Riser Engineering Offshore West Africa. OMAE2013 10540
Deepwater Current Profile Data Sources West of Shetland Jeans et al (2014). Current Profile Data Sources for Engineering Design West of Shetlands. OMAE2014 24114
Deepwater Current Profile Data Sources Conclusions Global HYCOM performs differently in each region Statistical calibration factor varies through the vertical HYCOM does not represent all current processes In situ data remain primary source for riser engineering Models play useful supporting role if validated and calibrated Valuable for long term context and spatial trends Expect improved performance from regional models
Response Based Extreme Current Profiles Coherent Extreme Current Profiles Jeans et al (2012). The Use of EOF for Deriving Response Based Extreme Current Profiles. OMAE2012 83052.
Response Based Extreme Current Profiles Coherent Extreme Current Profiles Jeans et al (2012). The Use of EOF for Deriving Response Based Extreme Current Profiles. OMAE2012 83052.
Response Based Extreme Current Profiles Coherent Extreme Current Profiles Jeans et al (2012). The Use of EOF for Deriving Response Based Extreme Current Profiles. OMAE2012 83052.
Response Based Extreme Current Profiles Coherent Extreme Current Profiles Jeans et al (2012). The Use of EOF for Deriving Response Based Extreme Current Profiles. OMAE2012 83052.
Current Profile Characterisation for Riser Fatigue Data Reduction Techniques Gold Standard for riser fatigue calculation 8,760 profiles/year at one hour intervals 52,560 profiles/year at ten minute intervals 525,600 profiles/year at one minute intervals Reduce to a few hundred characteristic profiles Percentage occurrence of each profile Single ping data to investigate integrity issues Prevosto et al (2012). Worldwide Approximations of Current Profiles For Steel Riser Design. OMAE2012 83348
New Challenges for Current Profile Characterisation Back to Shallow Water for Tidal Energy Black, K., (2014). A proposed Framework for Turbulence Characterisation a Tidal Energy Sites. RUK Tidal Energy Conference.
Current Profile Characterisation for Tidal Energy Single Ping Data Management Black, K., (2014). A proposed Framework for Turbulence Characterisation a Tidal Energy Sites. RUK Tidal Energy Conference.
Current Profile Characterisation for Tidal Energy Comparison to the ISO Profile Acknowledgement to John Atkinson of Partrac
Current Profile Characterisation for Tidal Energy Comparison to the ISO Profile Acknowledgement to John Atkinson of Partrac
Current Profile Characterisation for Tidal Energy Comparison to the ISO Profile Single ping at one second intervals: 2,592,000 profiles/month 31,536,000 profiles per year Acknowledgement to John Atkinson of Partrac
Current Profile Characterisation for Tidal Energy Individual Single Ping Profiles Acknowledgement to John Atkinson of Partrac
Current Profile Characterisation for Tidal Energy Individual Single Ping Profiles Acknowledgement to John Atkinson of Partrac
Current Profile Characterisation for Tidal Energy Individual Single Ping Profiles Acknowledgement to John Atkinson of Partrac
Current Profile Characterisation for Tidal Energy Individual Single Ping Profiles Acknowledgement to John Atkinson of Partrac
New Challenges for Current Profile Characterisation Back to Shallow Water for Oil and Gas Turbulence can be an issue Example : Breaking internal waves Critical for seabed infrastructure Full profile often not measured
Into Deepwater and Back Again: New Challenges for Current Profile Characterisation Key challenges in deepwater oil and gas Reliable full water column data especially frontier regions Coherent characterisation for extremes and fatigue Joint probability with wind and waves Prediction of structural response especially VIV Key challenges in shallow water renewables Necessarily harsh metocean environments Single ping data management and quality control Characterisation of turbulence for turbine engineering
Characterisation of Ocean Turbulence For Tidal Energy Site Development Black, K., (2014). A proposed Framework for Turbulence Characterisation a Tidal Energy Sites. RUK Tidal Energy Conference.
IMarEST Operational Oceanography Special Interest Group