responce forecasting gangway

Response Forecasting

StormGeo has state-of-the-art technologies to forecast weather-influenced motions and provide decision support.

StormGeo has state-of-the-art technologies to forecast weather-influenced motions and provide decision support.

Contact us for more information and schedule a call with a StormGeo representative.

StormGeo has state-of-the-art technologies to forecast weather-influenced motions and provide decision support.

Whereas previously in marginal weather states we have perhaps disconnected too early, now we have the necessary information to optimize connectivity while still adhering to the highest safety standards.
Captain Suffield
key benefits

Safety of Crew

Our Response Forecasting services provide decision support to a safe passage for personnel between the flotel and the host installation.

Reduce Downtime

Our systems give you the necessary information to optimize connectivity while still adhering to the highest safety standards.

Safeguard Operations

Our system allows users to plan and schedule the disconnect according to procedures.

Details and Specifications

The operation of offshore floating units is greatly affected by weather-influenced motions. StormGeo has combined state-of-the-art technologies from meteorology and hydrodynamics to forecast these motions and provide decision support, enabling you to increase uptime and safeguard operations. 

Response Forecasting Features:

  • Forecast expected responses, based on hydrodynamic models and forecasted weather, for the vessel.
  • Forecast heave, surge, sway, pitch and roll of the drilling deck.
  • Forecast heave, pitch and roll of the helideck.
  • Simulate multiple headings in a pre-defined sector.

Response Forecasting Benefits:

  • Predict vessel behaviour and rig response to optimize critical response operations.
  • Optimize drilling operations and save costs.
  • Enhance helicopter logistics and save costs.
  • Maximize gangway availability to accurately and safely schedule procedures.
ResponseForecast

Predict Rig Movements

Undesirable movements in floating offshore installations can be the origin of potentially dangerous situations and expensive shutdowns of operations.

StormGeo’s Response Forecasting is designed to predict the movements of the rig and drilling deck by combining accurate weather information with detailed knowledge of the predicted response of each floating unit. This increases the accuracy of operational planning and logistics, reducing risk and drilling costs.

Hydrodynamic Analysis and Modeling Forecast Critical Response

State-of-the-art technology and advanced hydrodynamic models forecast motions of offshore floating units to improve performance and ensure cost-effective operations.

  • Rig and Drilling Deck Forecasts predict heave, sway, surge, pitch and roll motion tailored to each floating structure.
  • Helideck Motion Forecasts predict the helideck’s heave, pitch and roll movements, then give the appropriate green, red or yellow light to support planning a more optimal helicopter schedule.
  • Forecasted Modeling optimizes positioning of a flotel, by forecasting the relative movement of the flotel and the gangway stroke to the attached platform. It simulates multiple headings in a predefined sector, ensuring maximum availability of the gangway connection. This ensures scheduled disconnections according to procedures, avoiding disconnecting in high seas or worst case an auto-disconnect. Other typical modelling involve mooring lines, DP system and thrusters, and lifting lines.
  • Information available in a customizable online portal for both onshore and offshore users, supported by a 24/7/365 team of forecasting specialists at StormGeo.
  • StormGeo’s forecasts increase HSE performance, using SIMO or MIMOSA models, which receive information from ECMWF wave models and allow operators to make knowledge-based decisions to save costs.

Availability Analyses

Availability Analyses reduce the uncertainty of downtimes caused by rig motion, resulting from weather (wind and waves) interaction with the drilling rig.

StormGeo uses hydrodynamic analysis together with high-quality hindcast weather data to calculate the probability of occurrence of a defined rig motion or the likelihood of breaching a certain motion limit criteria.

The results are used to estimate the operational availability of a specific drilling rig in a specific location when considering rig motion limitations, e.g. heave amplitude limitations due to heave compensating system.

Availability Analysis graph2

With StormGeo's Availability Analyses, you will be able to answer questions such as:

  • What percentile of days are we likely to experience heave < 2.5m on the project location during the months of March through to September?
  • What is the frequency of heave >1.5m for my rigs at various locations?
  • What is the calculated number of days waiting on weather for my rig on location ‘Z’?

Forecast of critical responses

In principle, decisions regarding drilling planning should be based on rig response forecasting rather than weather criteria. It is not only wave height that affects the heave, pitch and roll of a semi-sub drilling rig. Wave period, the direction of waves to the hull and the design characteristic of the rig are critical to rig responses. Response forecasting reduces drilling costs by increasing the accuracy of operational planning and logistics.

Response Forecasting minimises the need for using over-conservative limits based on wave height only. It allows for planning around a more accurate prediction of when heave compensation systems will no longer cope with weather conditions.

The basis of the technology is to combine the advanced hydrodynamic models of the vessel with weather forecasts. The result is accurate forecasts of rig motions for the planning of drilling and helideck operations.

Rig motion forecast

Flotel and Gangway Continuous Decision Support

When operating offshore, your crew need to be able to rely on their connection to the flotel. We help you achieve a controlled disconnection during calm weather rather than during high seas or, worse, experiencing an auto-disconnect.

StormGeo offers Flotel and Gangway Continuous Decision Support to increase the availability of the gangway connection from the platform to the flotel and avoid situations where crew changes cannot take place as scheduled.

The system uses StormGeo’s high-quality weather information, in combination with advanced rig dynamics modeling (from Deep Sea Mooring), to simulate and forecast the relative movements of the flotel, gangway and attached platform. It simulates multiple headings in a predefined sector, allowing for the easy planning of optimal positioning of the flotel, which ensures maximum availability.

In situations where a disconnect cannot be avoided, the system allows users to plan and schedule to disconnect according to procedures.

Airbus helicopter sea ocean platform aviation offshore

Helideck Motion Forecasts

Cancelled or missed helicopter landings due to uncertain helideck conditions are costly and affect work progress. Offshore operators need to know whether a helicopter can land or not, based on a clear picture of helideck motions.

StormGeo’s Helideck Motion Forecasts predict the helideck’s heave, pitch and roll movements, then give the appropriate green, red or yellow light to support planning a more optimal helicopter schedule.

All information is available in a customizable online portal for both onshore and offshore users, supported by a team of specialists at StormGeo, available 24/7, year-round. We help you make knowledge-based decisions, increase your HSE performance and ensure cost-effective operations.

Helideck heave velocity Vs day and night time heave velocity thresholds

Operational Support

StormGeo offers a fully manned operational forecasting desk 24/7 from our office in Bergen, Norway.

Telephone assistance is available 24/7 in English, whenever clarifications and/or interpretation of weather forecast/scenario is required.