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  • CLS-3.1: Recommendations for the design of the structure

 

Recommendations for the design of the structure

CLS_OFF.3.1 : Recommendations on the design of the structure

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Challenge ID

CLS_OFF.3.1

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Title

Recommendations for the design of the structure

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Originator of Challenge

TECHNIP/SAIPEM

 

General description

 

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What data/products do you currently use ?

  • Profile of current for 95% occurrence, 1y, 10y and 100y return period
  • Extreme wave event data (H/T for 1y,10y,100y return period)
  • Wave scatter diagram (H/T) based on annual recording
  • Wind, Wave and current data

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When do you use this kind of dataset?

These extreme event data are useful during project development phase for the design of structures.

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What are your actual limitations and do you have a work around? 

Actual limitations:

  • Very low level of correlated data, i.e. we know well independently current velocities/directions, wave height/period/direction but have very low correlated data (which current to be associated to such extreme wave).
  • Current profile trough the water depth considered unidirectional.
  • Wave scatter diagram based on annual recording are often given omnidirectional (better for us to have one scatter per direction).

 

 

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Needs and expectations on EO data

Data provide by Company, so no work around as no way to act on it.

When no correlated data exist, we combine even in a conservative way (max value of everything in the most critical combination of directions)

 

Challenge classification

 

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Lifecycle stage

Pre license

Exp.

Dev.

Prod.

Decom.

Score from impact

 

 

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Geographic context/restrictions

All over the world but some parameters are more predominant in some region; exemple: current important in West Africa and wave predominant in Brazil

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Topographic classification / Offshore classification

Deep water to very deep water (around 1800m)

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Activity impacted/concerned

Design of Riser: Best estimation of environmental conditions could optimize Riser design, structural support design, Major cost impact

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Urgency

(How quickly does the user need the solution)

Immediate (0-2 yrs); Short term (2-5 yrs);

 

Information requirements

 

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Update frequency

Annual

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Temporal resolution

Every 1h/3h;

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Spatial resolution

1km

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Data quality

Geo-stationary referred to a specific location

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Data Coverage and extent

Geo-stationary

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Example formats

Text, excel, GEOTIFF, GIS…

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Timeliness

Around a week

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Existing standards

Yes, quality systems in place internally