tips to perform a ram study webinar presentation_tcm4-539661
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Victor Borges, RAM Product Manager
Tips to perform a RAM study
DNV Software - Webinar materialFeb 28 2013
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Tips to perform a RAM study
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AgendaWhat is advanced RAM analysis?Quantitative picture of Performance
DNV solutionTop 5 tips to perform an effective RAM Study
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Tips to perform a RAM study
“Defeat is ensured for the one who beforehand does not have all things in order,
people call it misfortune. While victory is ensured for the one who beforehand has
learned to be prepared, people call it luck.”
Roald AmundsenWe call it RAM!
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DNV calls it…
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Tips to perform a RAM study
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What is Advanced RAM
Analysis?
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Tips to perform a RAM study
What is Advanced RAM analysis?
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What is Advanced RAM analysis?
RAM is a methodology used to predict asset performance for a given configuration in terms of Reliability, Availability and Maintainability
Our products go beyond traditional RAM analysis by adding capabilities related to operationstailored to the Oil and Gas industry which provides as result utilisation and productionefficiency.
Takes into consideration all factors affecting production in order to forecast performance overthe life of the asset
Examples of factors are Equipment Performance, Redundancy, Maintenance Strategies,Logistics, Demand Requirements etc.
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Tips to perform a RAM study
Simulation
How it works
- The user specifies a configuration in terms of equipment reliability and dependencies, aswell as the associated asset operations
- By discrete event simulation using a MonteCarlo method, a number of life cycles giventhe specified configuration are simulated
- By performing a large enough number of lifecycle simulations a reliable prediction of the
asset performance is produced
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The benefits with simulation are
- It can be used with process complexities
and uncertainties where exact analyticalsolutions are not possible
- It allows for easy extension of the analysisto include large inventories & sensitivitystudies (‘what-ifs’)
- It highlights the weak links in theconfiguration (equipment criticality) andallows you to optimise asset configurationand operations
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Tips to perform a RAM study
Why are we doing this?
Slide 7
Maximizing Plant efficiency / reliability levels Product generation/throughput
Minimizing manning costs
materials costs maintenance work load transportation and support downtime affecting revenue/operating costs
whilst
Maintaining
contractual nominations safety case requirements
and
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Tips to perform a RAM study
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Quantitative picture of
Performance
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Tips to perform a RAM study
Quantitative Picture Of Performance
Slide 9
Reliability Equipment performance data
(failure frequencies)
System configuration
Maintainability
Maintenance resources
Shift constraints
Mobilization delays
Spares const raints
Availability
Equipment/System uptime
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Tips to perform a RAM study
Availability
Slide 10
Pump onPump failed
Pump onPump failed
Pump on
Actual
Pump always on
Potential
Time
%
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Tips to perform a RAM study
Quantitative Picture Of Performance
Slide 11
Reliability Equipment performance data
(failure frequencies)
System configuration
Maintainability
Maintenance resources
Shift constraints
Mobilization delays
Spares const raints
Availability
Equipment/System uptime
Operability
Plant interdependencies
Plant re-start times
Production/demand rates
Storage Size
Tanker Fleet and Operations
Production Efficiency
Achieved product ion
Production losses
Criticality
Contract shortfalls
Delayed cargoes
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Tips to perform a RAM study
Production Efficiency (Utilization)
Slide 12
Time
Production Rate
Pump always on
Potential
Volume
Pump onPump failed
Pump onPump degraded
Pump on
Actual
Volume
%
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Tips to perform a RAM study
Quantitative Picture Of Performance
Slide 13
Reliability Equipment performance data
(failure frequencies)
System configuration
Maintainability
Maintenance resources
Shift constraints
Mobilization delays
Spares const raints
Availability
Equipment/System uptime
Operability
Plant interdependencies
Plant re-start times
Production/demand rates
Storage Size
Tanker Fleet and OperationsUnit Costs/Revenue
Product price
Man-hour/spares costs
Transport costs
Discount rates
Net Present Value
Lost Profit Opportunity
Production Efficiency
Achieved product ion
Production losses
Criticality
Contract shortfalls
Delayed cargoes
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Tips to perform a RAM study
Operational Expenditure (OPEX) / Lost Revenue
Slide 14
Maintenance
Expenditure Lost Profit Opportunity
Pump onPump off
Pump onPump degraded
Pump on
ActualVolume
Lost Revenue
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Tips to perform a RAM study
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Products
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Tips to perform a RAM study
Maros
Maintainability Availability ReliabilityOperabilitySimulation program
Tool of choice for analysis of upstream andLNG assets for the past 25 years
In use since 1984 with continuousdevelopment efforts
Provides functionality for modelling of allissues pertinent to process equipment and
units in the upstream market
Features include time varying productionflow profile, multiple products, productionrecovery techniques, tanker exportoperations, financial modelling and more
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Tips to perform a RAM study
Taro
Total Asset Review & Optimization
Specialised for modelling of refinerycomplexes
Developed since in 1995
Provides capability for the integration of shipping and storage into performancemodels
Features include multiple streams, unit
interdependencies, yield rates, blending
rules, advanced storage and more
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Tips to perform a RAM study
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Top 5 tips to perform an effective
RAM Study
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Tips to perform a RAM study
Top 5 tips to perform an effective RAM Study
1. Definition
- Define the objectives and scope
- Define boundaries for the study
2. Collecting- Collate all required data
3. Preparation
- Prepare a study basis
- Build the model in stages- Verify model operation at each stage
4. Results
- Compare over all results with expectations
- Perform sensitivity analyses- Generate reports
5. Document and archive model files
Slide 19
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Tips to perform a RAM study
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Definition
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Tips to perform a RAM study
Define Objectives and Scope
Most common objective is “what production efficiency can we expect from this
design”
Some other examples:
- What reliability should we specify for the export compressor?
- What platform availability gives an acceptable overall security of oil supply?
- What is the most cost effective way to improve security of gas supply?
- What is the impact of alternative maintenance strategies?
Slide 21
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Tips to perform a RAM study
Define Boundaries For The Study
Model core system
Can external influences be synthesised or must they be explicitly included
Can we estimate the influence of external factors? If so we can decide which to
include and which to exclude
A good model contains the minimum amount of detail that still yields a valid answeri.e. most complex is not necessarily the best
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Tips to perform a RAM study
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Collecting
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Tips to perform a RAM study
Collate All Required Data
What is unique to this study??
Reservoir data
Gas sales agreements
Basis of design document
PFDs, P&IDs, schematics, cause and effect charts
Maintenance logistics and strategies
Reliability data
Etc……….
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Tips to perform a RAM study
Reliability data
Getting the right data is a crucial step in a RAM Study
Sources
- Generic Reliability Data
- In-House Reliability Data- OREDA Offshore Reliability Data
- AEA Reliability Databank
- European Reliability Industry Data Bank Handbook (EIReDA)
- RAC Reliability Data books
- CCPS Process Equipment Reliability Database (PERD)
- Cox, Lees & Ang
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Tips to perform a RAM study
Generic data Versus In-house data
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Data Sources Advantages Disadvantages
Generic-published Easy to obtainNon-specific boundaries and
assumptions unknown
Generic-applied Can be produced relativelyquickly
Requires detailed knowledge of
proposed application andfactors influencing reliability
Collected-maintenance data Uses existing records
Many not have data in thecorrect form or detail required,
or sufficient amount of data
Collected-formal scheme
Very detailed reliability
parameters can be obtained onspecific items and in correct
formLong term project in order tocollect sufficient experience
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Preparation
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Tips to perform a RAM study
Prepare The Study Basis
Assumptions
Objectives
Description of model to be built
Reliability Block Diagrams (RBDs)
Data Register
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Tips to perform a RAM study
Typical Model Development Path
Slide 29
Final model runs
Run model, review results, reconfigure
Operational considerations
Maintenance strategies
Maintenance resources - manpower, spares, tools
Equipment configuration and reliability data
Flow/Reservoir Deliverability
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Results
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Tips to perform a RAM study
Compare Results With Expectations
Can the results be explained?
Are there any areas of unexpectedly low or high criticality?
If necessary generate and check log files to investigate further
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Tips to perform a RAM study
Analysis Results
Availability (uptime)
Production Efficiency
Production Statistics
Complex / Platform / Equipment Criticality
Frequency of Shutdowns
Maintenance Resource Expenditure
Utilization
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Tips to perform a RAM study
RAM Applications (Study Types)
Conceptual Design Screening Studies
Facilities Optimization
Detailed Engineering
Development of Operations Reference Plan / Asset Reference Plan
Maintenance Strategy Evaluation (RCM)
Manning Studies
Workload Assessments (e.g. Vessel utilization)
Risk Analysis (e.g. Well Risk)
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Tips to perform a RAM study
RAM Applications (Asset Types)
Subsea (Remote & Deep water)
Normally Unmanned Installations (NUIs)
Minimum Manned Platforms
Central Processing Facilities
Onshore Oil & Gas Processing Terminals
LNG Plants
Refinery Unit and Site Optimisation
Co-generation Power Plants
Petrochemical Plants
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Tips to perform a RAM study
Life Cycle Performance Analysis
Analysis is not just about producing one availability figure, which can then be quoted
as the performance figure for the development.
Analysis is about a picture of performance (transparency) which the project team canuse to make decisions
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Tips to perform a RAM study
Life Cycle Performance Analysis
Performance assessed to a number of criteria - build a picture of performance
Transparency of performance criteria leads to confidence in the assessment
Analysis is best in a comparative assessment of competing designs or operating
scenarios
Utilize sensitivity scenarios to understand risk or uncertainty in the performancefigures
Where absolute figures are required some degree of calibration or benchmarking isrequired
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For further interest, trial version, software demo or aquotation please do not hesitate to contact us:
Best regards,
DNV Software
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Tips to perform a RAM study
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and the environment
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