OLGA for Wells - Aker Solutions

OLGA the Dynamic Multiphase SimulatorTransient Well Flow SimulationsDynamic Well Simulation, application areas and benefits usingOLGA for WellsJohn SundtSenior Vice President, SPT Group1

OLGA application areas andWellsWellControlFlowAssuranceEngineeringOperationSteady StateWorkflowOLGAIntegrationEngineeringOperationIntegratedSolutionsTrainingOTSOnlineMonitoring &Optimization2

Well ControlWellControl• 20 years of Well control simulation with OLGA• Well control specific interface for OLGA, (OLGA ABC)3

Well ControlEssential part of emergency response planning– Blowout rate estimation– Relief well design– Bull heading– Dynamic kill parameters• Kill Rate• Pump Pressures and capacityWellControl4

OLGA for WellsWells• Well interface to OLGA• Workflow and functionality for Dynamic simulation of well scenarios• Near Wellbore simulator ROCX5

Subsea and offshore Wells• High cost• Costly to work-over• High reliability required• Subsea wells have lower recovery rates6

Phenomena requiring dynamic modeling7

A well can be a single flow pathVerticalSlantedHorizontalUndulating888

ut can also be a complicated networkMulti-stringMulti-zoneMulti-lateralSmart999

Accurate performance modeling of the flow controlequipment/devices• Flow Control– Choke– Check valve– ESP and PDP– Gravitational separator– ESD– SCSSV– Gas-lift valves– ICV and ICD– DIACS– Sliding sleeves– Slotted liner– Sand screen• Controllers1010 10

Bottomhole flowing pressureReservoir variablesZ (Depth)Inflow performance relationship• Linear and non-linear mass-based IPR• Constant Productivity Index• Vogel equation– Saturated oil reservoir• Normalized Backpressure– Saturated reservoir (oil/gas)• Saturated oil wells• Backpressure equation– Gas wells• Forcheimer model– Low pressure gas wells• Single Forcheimer model– High pressure gas wells• User tabulated IPRs• Quasi-dynamic inflow performance– P R , T R , PI, k-h, S, D, n-C, GOR, WC… etc areavailable as time series for input• ROCX, Near Wellbore simulatorWater Saturation0204060QP RPISTime0.2 0.3 0.4 0.5 0.6 0.7 0.8801000 0.5 1 1.5 2X111111

Some examples12

Unloading Gas Lifted Well13

Well Clean-up / Start-up14

Clean-up to HostHostWell head15

Wellbore flowing pressure (bara)Wellbore flowing pressure (bara)Wellbore flowing pressure (bara)Completion Stinger Design200.0199.5200.0199.0199.5198.5 200.0199.0198.0 199.5198.5197.5 199.0198.0197.0 198.5197.5196.5 198.0197.0196.0 197.5196.5Completion design 1: cemented and perforated casingCompletion design 2: cemented and perforated casing + passive stingerCompletion design 3: cemented and perforated casing + active stingerCompletion design 1: cemented and perforated casingCompletion design 2: cemented and perforated casing + passive stingerCompletion design 3: cemented and perforated casing + active stinger0 250 500 750 1000 1250 1500 1750 2000 2250 2500Completion design 1: cemented and perforated casingDistance from heel (m)Completion design 2: cemented and perforated casing + passive stinger16

Production optimization/ ProceduresGas LiftRateGas LiftPipe: ID=8”, length 4.6kmRiser: ID:8”,depth: 120 mAnnulus: ID=0.216 mDepth: 2840 mTubing: ID=0.1143 m17

Modeling wells in OLGA has become easy.example; Dry-tree well geometryin minutes!18

Gas lift valves and ESP’s in OLGAin seconds!19

Gas lift valves and ESP’s in OLGAIn seconds!20

Application areasof transient well flow simulationsWell Flow AssuranceHydrateWaxWell Flow DynamicsDrilling HydraulicsCompletion DesignCleanupWell TestingArtificial LiftGas Well DeliquificationHorizontal & MultilateralsWell-Pipeline InteractionWell-Reservoir InteractionInjectionCO 2 StorageSAGDWell IntegrityWell SurveillanceHeavy OilAnnulus Pressure ManagementLeakageErosionCorrosionEquipment IntegrityTemperatureWell ControlDTSPLTOnline/Offline Soft SensingWater Monitoring21

Number of papers199019911992199319941995199619971998199920002001200220032004200520062007200820092010Publications: more than 70 papers publishedOLGA-for-Wells papers - yearly statistics (1990~)12111098GeneralControl and OptimisationValidationNear-WellboreLiquid Loading76543210Flow AssuranceTransient OperationSlugingArtificial LiftWell TestingCleanupSmart WellsWell ControlDrillingYear2222

Summary of Values• Dynamic simulation has proven value throughout the wells life cycle– Planning & Design– Start-up– Production optimization / trouble shooting• For Operators– Reduced risk, increased production and reduced down time• For Service Companies– New service offers and value added solutions• For Engineering companies– Extending Flow assurance to include the well and near wellbore– Offering further value to your client base using familiar tools23

e dynamicThank you for your attention and…24