Offshore and coastal technology for petroleum production and transport from arctic water.
The objective of the project is to increase the knowledge of Arctic/cold climate technology for safe and sound petroleum production and transport from the Arctic region. The project aims in particular towards sustainable development and exploitation of petroleum resources in Arctic waters. The project will enhance the competitiveness of Norwegian oil industry active in Arctic waters.
The project comprises 9 different topics – all relevant for the oil industry and especially applicable for the offshore petroleum production and transport in the ice-infested part of the Barents and Pechora Seas. However, the research is also relevant for the petroleum development in the Kara Sea, the Caspian Sea and off Sakhalin. The research project comprises the following tasks:
- Task 1: Ice ridges
- Task 2: Dynamic ice actions on structures
- Task 3: Marine units in ice
- Task 4: Ice gouging and protection of sub-sea installations
- Task 5: Berm breakwaters and ice barriers in cold waters
- Task 6: Ice actions on jack-ups
- Task 7: Thermal stresses in ice and inhomogeneity
- Task 8: Collection of ice pilot experiences from sealers
- Task 9: Miscellaneous (work shops, printing of books)
Task 1: Ice ridges
To increase the understanding of the temporal and spatial development in ice ridges in full-scale and model-scale, and to investigate the effect of structure geometry on loads from first-year ice ridges on structures.
Task 2: Dynamic ice actions on structures
The purpose of this task is to increase the knowledge about the occurrence of ice-induced vibrations on vertical and conical offshore structures.
Task 3: Marine units in ice
The purpose of this task is to increase the understanding of structural safety and serviceability of icebreaking vessels in pack-ice. The task is five-fold:
1. To study dynamics of moored icebreaking ships in pack-ice.
2. To study dynamics of dynamic positioned (DP) icebreaking ships in pack-ice.
3. Methods to diminish lateral ice pressure.
4. Sea ice dynamics and ice management.
5. Analysis of the ice transport around offshore structures.
Task 4: Ice gouging
To increase the understanding of ice ridge gouge processes and its influence on sub sea installations and buried pipelines. The aim is to develop a fully coupled 3D Arbitrary Lagrangian Eulerian (ALE) Finite Element (FE) model of ice ridge – soil – pipeline/template interaction.
Task 5: Berm breakwaters and ice barriers in cold waters
The purpose of this task is to establish improved design criteria for breakwaters/ice barriers in cold waters.
Task 6: Jack-ups in ice
The purpose of the task is to increase the knowledge of design of jack-ups intended for operations in ice. Theories and algorithms will be implemented in the finite element program USFOS and made available to the industry.
Task 7: Thermal stresses in ice and inhomogeneity
The purpose of the task is to characterise level ice thermo-mechanical properties by in-situ stress measurements and examining of spatial variation of properties (strength, temperature, salinity and porosity). A second part will be to provide mechanical analysis and a Finite Element Model (FEM) and then estimate ice actions on structures in landfast ice covers. Finally the influence of inhomogeneous ice has on the size effect will be studied.
Task 8: Collection of ice pilot experiences from sealers
The purpose of this task is to collect experiences with sailing in ice from ice pilots and sealers that have operated in Arctic waters for decades.
Task 9: Miscellaneous (work shops, printing of books)
The purpose of this task is to disseminate results from the project.
(27/05-2010) Ada Repetto, Arne Gürtner, Ove Tobias Gudmestad and Knut Høyland were awarded best session paper at the 28th International Conference on Ocean, Offshore and Arctic Engineering 2009 in Honololu, USA for the paper: "Shoulder Ice Barrier Ice Tank Testing: Part I — Qualitative Description of a Shoulder Ice Barrier-Ice Interaction During Model Tests".