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DNV GL © 2013 SAFER, SMARTER, GREENERDNV GL © 2013
SOFTWARE
Integrating logistics operations to RAM analysis: how does it improve the supply chain performance
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Transport logistic modelling
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Transport logistic
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Logistics operations
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An oil tanker is a ship designed for the bulk transport of oil.
There are two basic types of oil tankers: the crude tanker and the product tanker.
– Crude tankers move large quantities of unrefined crude oil from its point of extraction to refineries.
– Product tankers, generally much smaller, are designed to move petrochemicals from refineries to points near consuming markets.
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Exporting Berthing Ships Berthing Importing
Export system
Approach, Berthing and Transfer
Oil carriers•Carry the oil from platform to customer delivery point
Approach, Berthing and Transfer•Operation of approaching the port and start the transfer operation
Import Terminal•Customer delivery point
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Exporting Berthing Ships Berthing Importing
Oil carriers•Fleet size•Ship size•Route Delays•Rejected cargos•Waterway constraints / Traffic
Approach, Berthing and Transfer•Metocean conditions•Tugs•Transfer method and thresholds•Weather forecast•Threshold for safe berthing and unloading
•Allocated window•Berthing rights•Early / Late arrivals•Loading / Unloading•Daylight limitations
Import Terminal•Multiple shippers operations•Storage and inventory•Design configurations•Reliability•Planned maintenance•Peaking capacity / Annual entitlement
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What impacts on a supply chain?
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Asset Performance
Terminal reliability
Process configuration
Berthing operations
Utilities Availability
Maintenance Strategies:• Terminal strategy• Vessel strategy
Production profiles
Planned Maintenance
Unit Capacities
Tank Size
Routes
Export Limits
Plant Characteristics
Inspection, Maintenance and
Reliability
Operations
Market
Logistics
Demand Limits
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RAM analysis
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Why RAM analysis?
RAM
Preferred design concept?
Overall system availability?
Downtime contributors?
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Decision support
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Plant-Wide Reliability Analysis
Evaluate impact of equipment/unit reliability on the ability to supply products to customers, by considering all relevant parameters:
– Network configuration
– Equipment/Unit performance
– Facilities capacity / maximum capacity
– Storage (feed, intermediate, and export)
– Logistics Issues
– Operations strategies
– Maintenance strategies
Enables complete integrated studies capturing plant reliability, facilities capacity, storage, and logistics issues
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Plant-Wide Reliability Analysis
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Plant-Wide Reliability
Unit Utilisation
Unit Availability
Equipment Availability
Component Reliability
•Individual Product Efficiency•Individual Product Volumes•Criticality
•Operational Flexibility•Unit Interdependency•Sales Strategy•Storage•Processes
•Unit Configuration•Maintenance Strategy
•MTTR
•MTTF•RCA•FMEA
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Benefits of Plant-Wide Reliability approach
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Benefits
Support financial investment decisions.
Helps validating send-out guarantees in contract negotiations
Allocating the responsibilities and liabilities to the key stakeholders
Sparing of selected equipment can be optimised.
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Oil carrier model
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Objective
An analyst is looking into understanding the impact logistics constraints to the supply chain
Objective
– To analyse the number and size of oil carriers
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Challenges
What is the impact of vessel motion to the system performance?
What is the influence of bottlenecks in the export operations?
What is the optimum size of my storage tanks?
What is the optimum size of my oil carriers?
What is the optimum number of oil carriers?
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Study description
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The FPSO includes a large range of different systems such as oil processing, gascompression and dehydration, produced water, flare, vent and power generation.
Wells have a similar systems
The maintenance is handled by a maintenance crew located on site at the FPSOand extra resources are needed depending on the equipment failing.
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Exporting Berthing Ships Berthing Importing
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Storage modelling allows operating rules to be placed upon nominated tanks. These rules are triggered by changes in the levels within the tank.
– Volume, Initial volume, Tank transfer rate – Tank level management: Call Up BT, Suppress BT and Trigger
Berths are gathering point for import or export of products. – Arrival and departure time control through berthing constraints, e.g. only berthing during day light hours (vary by month)– Variable operating times, loading/unloading rate– Transfer equipment failures, operational interruptions, berthing delays
Oil carrier covers all types of transport systems that involve movementof batches of products from Suppliers to Customers.
– Size and number, Berthing and disembarking times– Loading/unloading rate– Transport times with variability / Transport failure modes
Transport Logistics modelling
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Infrastructure is largely the same!
The basic definition is: Storage >> Berth >> Bulk transport
Variations on this configuration can be done:
Infrastructure modelling
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Supply chain modelling
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Oil carriers: Export branch
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Type: Berth Name: Oil export berth Load rate: 200 mbbls/day Dock = export
Type: Ship Name: Oil carrier Max transfer rate: 200mbbls/day Vessel size: 300 mbbls/day
Type: Storage
Name: Oil export tank
Tank transfer rate: 150 mbbls/day
Max Volume: 300 mbbls
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Oil carriers: Import branch
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Type: Berth
Name: Oil import berth
Load rate: 150 mbbls/day
Dock = Import
Type: Storage
Name: Oil import tank
Tank transfer rate: 150 mbbls/day
Max Volume: 300 mbbls
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Suppliers/Customers
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Right-click on Oil carriers and select properties
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Results
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Results
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Criticality
Production efficiency
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What is the best design option?
What is the impact of different
maintenance strategies?
What are the optimum
operational procedures?
Discussion
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Logistics operations work for a range of years
The logistics operations of base case cannot cope for years of peak capacity
So what could we do to change this?
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What could we change to enhance the performance?
Increase the number of Oil carriers?
Increase the export rate? Decrease the export rate?
Increase the size of the storage tank?
What are the limitations to these changes?
