structure integrity management for fixed structures rp 2sim system based risk rule based risk rsr...
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DNV GL © 2013 May 2016 SAFER, SMARTER, GREENERDNV GL © 2013
SOFTWARE
October 31, 2016Cangbo Zheng Head of Section - Fixed Structure Offshore Engineering Pål Dahlberg Product Manager Synergi Structure
Structure Integrity Management for Fixed Structures
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DNV GL © 2013 May 2016
The Situation: 3000+ Fixed Offshore Platforms in GOM
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Source: Wall Street Journal (2010)http://www.wsj.com/news/interactive/AGING101214
More than 50% of the platforms have exceeded the design lives
DNV GL © 2013 May 2016
The Situation: Oil Price
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Industry focus on Cost Cutting (OPEX & CAPEX)
DNV GL © 2013 May 2016
How DNVGL can help with data-smart SIM solutions
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Keep Control of your assets with reduced staff– Efficient Data Management
Lower data hand-over costs– Contractor <=> Operator
Lower data integration costs– In between SIM related applications
Optimize the SIM Program– Moving from time based to Risk based planning
– Smarter Structural Assessments
CAPEX related
OPEX relatedOPEX related
Asset Life Extension vs. New Field Development
DNV GL © 2013 May 2016 SAFER, SMARTER, GREENERDNV GL © 2016
SOFTWARE
Sesam user course SE-10
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Synergi Structure DNV GL’s Structural Integrity Management System
DNV GL © 2013 May 2016
DNV GL - Software
DNV GL is the world-leading providerof software for a safer, smarter and greener future
in the oil and gas, energy, maritime and process industries.
Ship managementand class
Asset simulationand optimisation
Design andengineering
Process Safety, risk and reliability
Asset integrityand performance
QHSE and enterprise risk
DNV GL © 2013 May 2016
DNV GL integrity management software packages
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SYNERGI PLANT• Facility management• RBI and RCM• Inspection and maintenance plan• Work packaging and execution• Integrity assessment and anomaly• KPI, traffic light, and report• Integration interface
SYNERGI STRUCTURE• Structure data and model• Structure RBI• Inspection planning and recording• 3D viewer• KPI, traffic light, and report• Integration interface
SYNERGI PIPELINE• Pipeline data management• Pipeline risk assessment• Inspection data management• Integrity and anomaly• GIS and spatial• KPI, traffic light, and report• Integration interface
SYNERGI DASHBOARD• Management overview• Risk summary and trend• Geographical risk view• Integration and drilldown
DNV GL © 2013 May 2016
SIMS in DNV GL – Timeline
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2004 2010 2013
SIMS ConocoPhillips Ekofisk
IIP SIMDNV Offshore Class
SIM for Statoil
Synergi Structure
Synergi Structure for Jacket Operators
DNV GL Merge
Galiom Structure
2012 2016
Synergi Structure Alignment of functionality
DNV GL © 2013 May 2016
Synergi Structure Applications as of 2016
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IIP In-service Inspection Programfor Mobile Offshore Units
Shared Web solution DNV GL – Client
300+ Units:
Semi-Subs, Jack-up, FPSO,++
DNV GL Offshore Class
DNV GL © 2013 May 2016
Synergi Structure Applications as of 2016
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Configurations for fixed & floating structures
Module for RBI for fixed platforms
Integration with Sesam Analysis Models
DNV GL © 2013 May 2016
Why SIM?
Ensuring fitness for purpose of offshore structure(s) throughout the lifetime
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”.”” The Operator shall throughout the lifetime of the installation ensure that the load bearing structures are suitable for the intended purpose.
The Operator shall monitor the condition of the operated offshore installation in a systematic manner.
NORSOK N-005
”The owner shall ensure that suitable arrangements are in place for monitoring and maintaining the integrity of a floating structure throughout its life cycle.”
”The purpose of the SIM system is to provide a formal process for ensuring the integrity of the structure throughout its intended design service life on a fit-for- purpose basis.”
ISO 19902 / 19904
”SIM is a process for ensuring the fitness for purpose of an offshore structure from installation through to decommissioning.
The process is a rational means for understanding the effects of degradation, damage, changes in loading, accidental overloading, changes in use, life extension, and the evolution of offshore design practice.
SIM provides a framework for the damage evaluation, fitness-for-purpose assessment, inspection planning, maintenance, and repair of a platform or group of platforms.”
API- RP-2SIM
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Structural Integrity Management Process
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DATA EVALUATION STRATEGY PROGRAM
Evaluation ofstructural integrity
and fitness-for purpose;
development ofremedial actions
Managed systemfor the archivaland retrieval ofSIM data and
other pertinentrecords
Detailed work scopes for inspection activities and offshore execution to obtain quality data
Overall inspectionphilosophy andstrategy andcriteria for in-
service inspection
DNV GL © 2013 May 2016
SIM Process in Synergi Structure
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DATA EVALUATION STRATEGY PROGRAM
Managed systemfor the archivaland retrieval ofSIM data and
other pertinentrecords
DNV GL © 2013 May 2016
Visualisation Models in Synergi Structure:
• From FEA Sesam (Entire Structure or substructure) reusing Sesam names
• Sesam Models mapped to a hierarchical breakdown
• Hybrid Model (Sesam + CAD components) mapped to a hierarchical breakdown
Synergi Structure Asset Condition Tracker Models
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DNV GL © 2013 May 2016
Synergi Structure Asset Condition Tracker Models
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Visualisation Models in Synergi Structure:
• From FEA Sesam (Entire Structure or substructure) reusing Sesam names
• Sesam Models mapped to a hierarchical breakdown
• Hybrid Model (Sesam + CAD components) mapped to a hierarchical breakdown
DNV GL © 2013 May 2016
Synergi Structure Asset Condition Tracker Models
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Visualisation Models in Synergi Structure:
• From Sesam (Entire Structure or substructure) reusing Sesam names
• Sesam Models mapped to a hierarchical breakdown
• Hybrid Model (Sesam + CAD components) mapped to a hierarchical breakdown
DNV GL © 2013 May 2016
SIM Process in Synergi Structure
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DATA EVALUATION STRATEGY PROGRAM
Evaluation ofstructural integrity
and fitness-for purpose;
development ofremedial actions
DNV GL © 2013 May 2016
Structural RBUI: Risk Evaluation
Consequence of Failure (COF)• Consequence band derived from Company Risk Matrix. (Configurable 5x5 Matrix)
COF defined as the most severe of:
• Health and safety• Environmental• Business• Reputation
Probability
1 2 3 4 5
Con
sequ
ence
A 15 12 12 10 8
B 12 10 9 7 5
C 12 9 7 5 5
D 10 7 5 5 3
E 8 5 5 3 3
Probability of Failure (POF)• Probability (likelihood) of failure can be categorized
by either
• Qualitative (rule based) method
• RSR semi-quantitative method
• Refined quantitative methods
Platform Risk = COF x POF Inspection interval is determined from interval matrix. (3-15 years)
DNV GL © 2013 May 2016
Structural RBUI – Probability of Failure (Rule Based)
• Rules have been developed to produce a score that defines the relative Probability of failure of the platform based on:
• Baseline platform Design (characteristic) data
• Present condition of the structure
• Load susceptibility rules
• To capture the relative importance of each rule, a weighting system is used.
• The summation of the product of the weight and score for each rule gives the overall Probability of failure score for each platform.
– Stotal = Total score for Probability of failure
– Wi = Weighting attributed to rule i
– Si = Score attributed to rule i
• The resulting Probability severity level (1-5) is determined based on a calibrated score range band for each severity level.
DNV GL © 2013 May 2016
Utilising Reserve Strength Ratio (RSR)
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• RSR: Measure of Platform Robustness
Displacement (Delta)
Rati
o o
f B
ase S
hear
to 1
00-y
ear
load
set
Ductile Collapse
Design
First Yield(primary framing)
Ultimate Strength
Linear Response Non-Linear Response
Major DamageServiceability Limit?
100 yr (Code Req.)
WAVE & CURRENT
∆
1.0
2.0
Robustness(defect tolerance)
X
Target X
• Ratio of the base shear at ultimate capacity to the base shear from the ULS 100-year load
• Derived from Non-linear progressive collapse “Pushover” analysis by e.g. Sesam Usfos
> Important that analysis models truly reflect the current condition
(Ref. Analysis Portal)
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RBUI Assessment in Synergi Structure
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DNV GL © 2013 May 201622
PoF Scorecard Calculation Drilldown
DNV GL © 2013 May 2016
RBI in Synergi Structure: PoF Calc. with RSR Override
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DNV GL © 2013 May 2016
Portfolio Risk Overview
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DNV GL © 2013 May 2016
SIM Process in Synergi Structure
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DATA EVALUATION STRATEGY PROGRAM
Evaluation ofstructural integrity
and fitness-for purpose;
development ofremedial actions
DNV GL © 2013 May 2016
SIM Assessment Process
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Data Evaluation ProgramInitiatorTriggered?
No
Yes
Assessment
Strategy
Triggers Structural Analyses
Modifications
Metocean Criteria
Weight Change
Damage/Deterioration
Regulatory Compliance
Analysis Portal :
Managing Change for As-Is Analysis Models
DNV GL © 2013 May 2016
Structural Analysis As-Is Models
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As-is = As-built + CHANGES
Modifications
Deterioration
Damage/Accidental Events
Foundation (Scour)
Metocean Criteria New Codes/Regulations
Air-Gap/ WiD
Exceedance of design life
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Analysis Portal – Analysis Model Tracker
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• Showing compliance status ,which Analysis models are required, and the status, whether the present as-is models are in compliance with all changes
• As-Is Model registerfor all Structural Analysis Models
• Safe controlled storage of Model data including geometry, loads & execution scripts+ all design basis documents
• Full version history with historical models
• Tracking Changes for As-Is Models
• Change Register with audit trail
• Overview of all affected models
• Holds all pertaining documents
• Workflow with email notifications
DNV GL © 2013 May 2016
SIM Process in Synergi Structure
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DATA EVALUATION STRATEGY PROGRAM
Overall inspectionphilosophy andstrategy andcriteria for in-
service inspection
DNV GL © 2013 May 2016
Alternatively, Long Term Plan based on quantitative RBI
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DNV GL © 2013 May 2016
Condition Monitoring – Inspection Management Supported
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Type Methodology Description Applicability
DNVGL Offshore ClassIn-service Inspection program
DNVGL-RU-OU-0101 Component Based
Periodic Inspection5 year renewal cycle
Scope pending on type, age, Class Notation
Mobile Offshore Units
(All vessels in DNVGL Offshore Class)
Qualitative RBUI In accordance with API RP 2SIM
System based
Risk Rule BasedRisk RSR Override
API RP 2SIM Default
Fixed Structures
JacketsJackets
Monopods
Quantitative RBI DNVGL-RP-C210 Component based
Calc. of PoF & CoF based on fatigue
Fixed & Floating Offshore Structures w/fatigue exposure
DNV GL © 2013 May 2016
Utilizing Qualitative & Quantitative RBI
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(Fleet of structures)Risk Ranking & Initial Assessment
(A selected or a fleet of structures)Data Gathering
Risk Matrix
Import Framework Inspection Plan into Synergi Structure
Prepare IMR Program(Selected structures(s))
(Selected structures)
Perform RBI Analysis• Risk Screening
• Refined Fatigue Analysis
Target probability level
1E-04
1E-03
1E-02
1E-01
1E+00
1E-04 1E-03 1E-02 1E-01 1E+00
Conditional probability of failure
Acc
umul
ated
failu
re p
roba
bilit
y
No inspections
Inspections required
DNV GL © 2013 May 2016January 201433
Quantitative RBI:Based on DNVGL RP-C210
DNV GL © 2013 May 2016
The Fatigue Analysis and RBI vs. Synergi Structure
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Fatigue Analyses
Inspectionhistory
RBIInspection Plan
Inspection Planning (RBI)
Inspection Program
Evaluation of findingsModels SIMS
Synergi StructureMember Importance Analyses
Inspection Results
Data
Integrity statusWhere to inspect ?
When to inspect ?
How to organize information?What inspection method ?
DNV GL © 2013 May 2016
SIM Process in Synergi Structure
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DATA EVALUATION STRATEGY PROGRAM
Detailed work scopes for inspection activities and offshore execution to obtain quality data
Inspection Workflow:
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© Det Norske Veritas AS. All rights reserved
Slide 36
09 November
Inspection Workflow
• Creating Inspections
• Scheduled
• Unscheduled – Special
• Historic
• Selecting Scope from LTIP
• Creating Work-Packs
• Recording wizard or Excel Templates
• Finally import of Inspection results into Asset Condition Tracker
DNV GL © 2013 May 2016
Inspection Workflow – Asset Condition Tracker
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• 3D View from Sesam Model
• (alt. import from Sacs)
• (alt generated from CAD)
• Multiple Viewing features
• Filtering on all attributes
• Trending of Inspection Data
• Assignment of Mitigations
• Follow-up until closure
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Synergi Dashboard
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Synergi Risk Dashboard: Demonstrate you are in control
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DNV GL © 2013 May 2016
Configurable Risk Maps – Offshore Field 1
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DNV GL © 2013 May 2016
Risk Map – Drill Down to Structure Dashboard
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Click
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Summing up
One central data management system holding all SIM data readily available
Instant overall KPI overview with easy drill down
Efficient tool for planning & executing Risk Based Inspections
Anomaly Management including 3D-View visualisation models
Analysis Portal – Change Management of Analysis models
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Synergi Structure provides:
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SAFER, SMARTER, GREENER
www.dnvgl.com
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[email protected]+47 416 12 764
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