8T. Removal, Life Extension & Redeploy of Floating ... · CASE STUDY (NAUTICA MUAR DECOMMISSIONING)...
Transcript of 8T. Removal, Life Extension & Redeploy of Floating ... · CASE STUDY (NAUTICA MUAR DECOMMISSIONING)...
� Introduction.
� Crude Assay & Production Profile.
� Technical Assessment.
� Asset Integrity.
� Interface Structures.
� Noise & Vibration.
� Harmful Substances & Collision Protection.
� Changes in performance Standards & Requirements.
� Regulatory Compliance.
� Project Execution Strategy.
� Transportation Aspects.
� Long Term Lay-Up Issues.
� Contractual Considerations.
� Case Studies.
� Conclusions.
PRESENTATION SUMMARY
IMEC INTRODUCTION
http://www.ime-consultants.com
• Established in 2010.
• IMEC is licensed under PETRONAS ‘SWEC’ code system.
• Approved under Petronas Block BAR MWS Policy.
• Marine Assurance & Engineering Support Services.
• ISO 9001:2008 certified company.
� Trends in Floating Production Market.
� Advantages of Floating Production Facilities.
� Factors Affecting Life Extension & Redeployment.
� Life Extension & Redeployment Options:
� Same Field.
� Different Operating Area.
� Long/short term lay-up.
INTRODUCTION
� Crude oil composition, gas/oil/water ratios, production volumes and duration.
� Can all have a Significant Impact on the functional specification (topsides
weight, power requirements, field life, corrosion protection etc.) .
� No such thing as a standard FPSO – certain modifications required for each
new production application.
CRUDE ASSAY & PRODUCTION PROFILE
� Essential that basis of design is clearly understood at the outset.
� Hull Elements.
� Production Facilities.
� Mooring System.
TECHNICAL ASSESSMENT
� Depends greatly on how the unit has
been operated.
� Fatigue Assessment.
� Rotating Equipment & Pipelines.
� Thickness Gauging.
� Surveys.
ASSET INTEGRITY
� Interface between Equipment Modules
and Hull Structure.
� Important due to Significant Topsides
Size and Weight.
� Stringent Noise Limits now Apply to
Accommodation Area.
INTERFACE STRUCTURES, NOISE & VIBRATION
� Insulation such as asbestos are still
present on many units.
� Decision to encapsulate or remove.
� Asbestos Management Plan.
� Adoption of high standards of
collision protection.
� Use of Sponsoons, Collision Frames & Internal Strengthening on Side Shell.
HARMFUL SUBSTANCES & COLLISION PROTECTION
� Challenges such as Deck Space Limitation, Power Availability.
� Changes to Process Performance Requirements.
� Regulatory Changes Specific to Floating Units.
PERFORMANCE STANDARDS, REGULATORY COMPLAINCE
� Critical towards the success of any life extension / redeployment project.
� Will influence the scopes that may be achieved, methodology and
operational issues.
� Factors such as statutory inspections, class survey cycles and material
availability are to be considered.
� Effective Planning minimizes disconnection time and loss of production.
PROJECT EXECUTION STRATEGY
� The Floating Unit will most likely be towed
to the intended location (unless it has
its own propulsion system).
� Attention to structural loading as towing
period may undergo the most severe
loading condition.
� Manned or Unmanned.
� Weather Impact on tug efficiency and
effective bollard pull.
TRANSPORTATION ASPECTS
� Safety, Security and Assurance for
Units Removed From Location.
� Exposure such as
� Breaking Free of Mooring.
� Fire.
� Watertight Integrity.
� Collision.
� Frequent follow up and inspection
as opposed to “lock and leave”.
� Seek same level of support
engineering & documentation
as other phases of asset lifecycle.
LONG TERM LAY-UP ISSUES
� Early Termination of FPSO lease contracts
has been an area of potential legal dispute.
� Termination for cause or convenience.
� Independent Reviews conducted in
advance can save time and money
compared to lengthy arbitration processes.
� Decisions on redeployment are key areas of underwriter exposure.
CONTRACTUAL CONSIDERATIONS
� Unique Construction, Modification &
Operating History.
� Fast tracked FSO Life Extension to
increase design life by 6 years.
� Actual structural details were different
from drawings in several locations,
presenting an engineering challenge.
� A total of 260 tonnes of Steel
replaced at Remontowa Shipyard,
Poland.
� An example of how early preparation
is key.
CASE STUDY (APOLLO SPIRIT)
� Engineering Support towards Decommissioning
of Nautica Muar FSU & redeployment of
Mampu 1 FSO.
� Limited storage capacity main driver for
decommissioning.
� Currently being executed and various types of
engineering analysis and assessments were
required before the project could commence.
CASE STUDY (NAUTICA MUAR DECOMMISSIONING)
� Drivers for success include:
� Proper Scope Management.
� Safety & Risk Management.
� Firm Communication Protocols.
� Effective Management of Change.
� Clear Definition at the outset.
� Collaboration & Communication.
� Floating Units have the right level of flexibility.
� Effective Redeployment of units can be more attractive than new build units
provided that the associated risks are identified and managed.
� Critical to ensure that the marine assurance aspects are adequately
covered.
CONCLUSIONS