Offshore concrete structures for the Arctic · “Concrete Structures for Oil & Gas Fields in Hostile Marine Environments” ” The object of the report is to support the concrete

Tor Ole Olsen, Dr.techn.Olav Olsen, Norway St.Petersburg 2011

9-ая

Российско-норвежская

конференция

понефти и газу

"Разработка

нефтегазовых

месторождений

всложных

климатических

условиях

“

| 25 -

27 ЯНВАРЯ

2011 г. |

ГОСТИНИЦА

«КОРИНТИЯ», Г. САНКТ-ПЕТЕРБУРГ, РОССИЯ

|

Offshore concrete structures for the Arctic

Tor Ole Olsen, Dr.techn.Olav Olsen









LoadingLoading


StructuralStructural testingtesting

Full scale joint test


Field trialsField trials




Shell section analysisLinear FE analysis

ShellDesign

Iterative non-linear analysis and design

F = kII ∙

ε

Stress resultantsStress resultants Element stiffnessElement stiffness

Stiffness formulation

Global analysisGlobal analysis


LightweightLightweight concreteconcrete in in floatingfloating structuresstructures

1975 1980 1985 1990 1995

Heidrun TLPConoco

LWAC 1 950 kg/m3

Troll BNorsk Hydro

MND 2 250 kg/m3

YognUS Navy

LWAC 1 720 kg/m3




Sakhalin II Phase 2 Reservoir

- 4 billion barrels Oil

- 20 trillion c.f. Gas

- PA-B is Oil Field

- LUN-A is Gas Field

w/ ass. Condensate

& multiphase to OPF.

Water depth- PA-B = 30,8 m

- LUN-A = 48,2 m

00

Vostochny Port

Detail Map next slide

Tow 960 not. miles to Sakhalin II

Field location in 18 Days at 2,5 knots



From ExxonMobil homepage From ExxonMobil homepage http://http://mms.businesswire.com/bwapps/mediaserver/ViewMedia?mgidmms.businesswire.com/bwapps/mediaserver/ViewMedia?mgid =193037&vid=5&download=1=193037&vid=5&download=1






HiberniaHibernia•• Grand Banks 315 km south Grand Banks 315 km south

East of St. JohnEast of St. John’’s s NewfoundlandNewfoundland

•• Design capacity of 135Design capacity of 135’’ to 150 to 150 000 barrels a day000 barrels a day

•• Ice management strategy: Ice management strategy: –– Approaching icebergs are Approaching icebergs are

towed away by platform towed away by platform support vesselssupport vessels

–– Small pieces of sea ice are Small pieces of sea ice are redirected by water redirected by water cannons on supply vesselscannons on supply vessels



Confederation Bridge, PEI, CanadaConfederation Bridge, PEI, Canada


Hammerfest LNG Plant Hammerfest LNG Plant –– Large Quantity Winter ProductionLarge Quantity Winter Production

•• Delivered quantity has been high during winter months, approx. 6Delivered quantity has been high during winter months, approx. 6 -- 8 000 m8 000 m³³/month/month•• Crucial with appropriate insulation and large capacity heating oCrucial with appropriate insulation and large capacity heating on the plant, 1 MW capacity n the plant, 1 MW capacity

on eachon each•• Delivery of heated concrete throughout the winter season, 20 Delivery of heated concrete throughout the winter season, 20 –– 3030°°CC•• Necessary to control supply of heat to get desired temperature oNecessary to control supply of heat to get desired temperature on concreten concrete


25% of undiscovered reserves of oil and gas?

•• Robust & Robust & flexibleflexible solutionssolutions

•• ConcreteConcrete is is suitablesuitable for for hostilehostile environmentenvironment

•• ConcreteConcrete platformsplatforms suitablesuitable for for locallocal contentcontent


The fib StateThe fib State--ofof--thethe--Art Report Art Report ““Concrete Structures for Oil & Gas Fields in Hostile Marine Concrete Structures for Oil & Gas Fields in Hostile Marine EnvironmentsEnvironments””

The object of the report is to support the concrete industry The object of the report is to support the concrete industry in developing sustainable solutions, help to promote their in developing sustainable solutions, help to promote their products in the arctic regions and foster constructive products in the arctic regions and foster constructive dialogues with clients and authorities sometimes lacking dialogues with clients and authorities sometimes lacking relevant background knowledge. Another purpose of the relevant background knowledge. Another purpose of the report should be to provide a guide to current design and report should be to provide a guide to current design and construction principles and Codes, and to identify areas for construction principles and Codes, and to identify areas for future development.future development.


Main characteristics of concrete structuresMain characteristics of concrete structures

•• High degree of inshore completionHigh degree of inshore completion•• High load carrying capacity High load carrying capacity •• Adaptability to changing functions and conditions during Adaptability to changing functions and conditions during

operationsoperations•• Ample space for (and access to) risers and conductors Ample space for (and access to) risers and conductors

inside the structureinside the structure•• Any unforeseen leakage contained inside the structureAny unforeseen leakage contained inside the structure•• Large oil storage capacity Large oil storage capacity •• Instant installation (a matter of days) and simple Instant installation (a matter of days) and simple

foundations. foundations.


Main characteristics of concrete structures Main characteristics of concrete structures –– contcont’’dd

•• Installation of topside on to the GBS in one swift Installation of topside on to the GBS in one swift operationoperation

•• Low maintenanceLow maintenance•• High resistance to accidental loadsHigh resistance to accidental loads•• Low Life Cycle Cost (LCC)Low Life Cycle Cost (LCC)•• Known technologyKnown technology•• Local contentLocal content•• Proven record of predictable construction schedule and Proven record of predictable construction schedule and

costcost


SummarySummary

•• 25 % of the world25 % of the world’’s undiscovered reserves of oil and gas s undiscovered reserves of oil and gas are believed to be in the Arcticare believed to be in the Arctic

•• Concrete structures have excellent characteristics:Concrete structures have excellent characteristics:–– In remote areasIn remote areas–– In severe climatesIn severe climates–– When need for storage is requiredWhen need for storage is required–– Great robustness with respect to environmental Great robustness with respect to environmental

challenges and extreme loadschallenges and extreme loads–– When appreciation of local content is importantWhen appreciation of local content is important

•• Key factor to success: Key factor to success: PROPER AND COST EFFICIENT DESIGN AND CONSTRUCTION!PROPER AND COST EFFICIENT DESIGN AND CONSTRUCTION!







Documents

Offshore concrete structures for the Arctic · “Concrete Structures for Oil & Gas Fields in Hostile Marine Environments” ” The object of the report is to support the concrete