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MAXIMISING RECOVERY
FROM DEPLETED GAS FIELDS
IN THE NORTH SEA
RENE PETERS
INNOVATION PROGRAM
TKI UPSTREAM GAS2016-2019
CURRENT STATUS NATURAL GAS IN NL452 gas fields discovered (on- & offshore)
• 265 in production• 4 converted to gas storage• 62 depleted• 30 planned for production• 77 “stranded fields”• 148 platforms on the Northsea
Infrastructure (platforms and pipelines) are at maximum and will decline from now on!
Current reserves: 1090 BCM (25 jr domestic use)Of which ~779 BCM still in Groningen FieldOnshore: 144 bcmOffshore: 167 bcm
CHALLENGES OF THE DUTCH OFFSHORE SECTOR
Maximise recovery from mature oil and gas fieldsExplore and develop conventional and unconventional reservoirs (p.e. tight/shallow reservoirs)Minimise operational costs of offshore operationsSeek integration and reuse of oil and gas infrastructure (p.e. wind)Minimise cost of decommissioning and abandonmentReduce the impact to the environmentFast deployment of new technology
Innovation Program Upstream Gas
WHAT IS TKI-UPSTREAM GAS?
National Innovation Program on Upstream GasPart of the national Topsector Policy
First program 2012-2015Second phase 2016-2019
Budget ~3 Meuro / yr
Benefits
Leading consortium in NL on Upstream Gas InnovationStrong network of 28 oil and gas stakeholders
Platform for joint R&D programs and JIPsInvolvement of (small) operators and supply industry
Leveraging knowledge investmentAcceleration of Innovation process towards demonstration
Innovation policyNL
Top SectorsEnergy
TKI TKI Gas
InnovationCluster
Upstream Gas
Program line
Project
www.upstream-gas.nl
INNOVATION PROGRAM UPSTREAM GAS
UPSTREAM GAS CONSORTIUM
2016 – 2019
PROGRAM STRUCTURE
Scientific Advisory Board(Independent & international experts)
Scientific Advisory Board(Independent & international experts)
Program Manager(supported by program office)
Program Manager(supported by program office)
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General Assembly: All partners involved +
Representative of TKI Gas board
General Assembly: All partners involved +
Representative of TKI Gas board
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Basin and petroleum system analysisBasin and petroleum system analysis
Field Development & PerformanceField Development & Performance
Drilling and CompletionDrilling and Completion
Well PerformanceWell Performance
InfrastructureInfrastructure
Decommisioning & AbandonmentDecommisioning & Abandonment
Health, Safety, Security and EnvironmentHealth, Safety, Security and Environment
Program Line Steering committeeProgram Line Steering committee
Program Line Steering committeeProgram Line Steering committee
Program Line Steering committeeProgram Line Steering committee
Program Line Steering committeeProgram Line Steering committee
Program Line Steering committeeProgram Line Steering committee
Program Line Steering committeeProgram Line Steering committee
Program Line Steering committeeProgram Line Steering committee
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• Roadmap based• Strong industry involvement• Open for international participation• Discovery-development-deployment
PROJECTS 2012-2015
1. Basin Analysis k€ 3880
Focus on Upper Jurassic Sandstones k€ 550Geochemical composition k€ 330HYPO-LIAS k€ 450Integrated pressure information system for the onshore and offshore Netherlands k€ 650Lower Cretaceous west Netherlands Basin k€ 400Lower Cretaceous/Upper Jarassic compartmentalisation and connectivity k€ 450New petroleum systems in the Dutch northern offshore k€ 850Rotliegend k€ 200
2. Field Development & Performance k€ 2679
Clay Swelling k€ 50EGR technical and economical feasibility k€ 390Sweet spot identification k€ 400Tectonics, stress, fractures and productivity (University consortium) k€ 1682Tough Gas Targeting k€ 157
3. Drilling and Completion - - -
4. Well Performance k€ 3130
Coatings for gas well deliquificatin k€ 150Foamer selection for liquid loading mitigation k€ 990Real time production Optimization k€ 690Salt precipitation: modeling and experimental validation k€ 1100Unstable flow in liquid loading gas wells k€ 200
5. Infrastructure k€ 250 Integrated compression solutions k€ 2506. Decom & Abandonment K€ 250 Natural Sealing of Gas Wells k€ 250
7. Health, Safety, Security and Environment
K€ 1077High Frequency Dynamics Guideline for Rotating Equipment k€ 252Innovative water management and green fraccing fluids k€ 250Produced water treatment k€ 575
Collaborative Innovation Core workshopsSeminarsJoint InnovationPilots and demonstrationKnowledge transferHands-on training
Dissemination• Field Trips• Newsletters• Website• Training
TKI UPSTREAM GASPROJECT EXAMPLES 2012-2015
BASIN ANALYSIS
NORTHERN OFFSHORE
BackgroundCan we identify and evaluatethe reservoir and source rock potential in the dutch northern offshore?
ApproachBuild tectono-sedimentary hypothesis using
Sedimentology of cores
Biostratigraphic analysis of rock samples(Sequence) stratigraphic evaluation of logs
Interpretation of key seismic lines
ResultsThis multidisciplinary project has drastically improved our understanding of the Permo-Carboniferous in the Dutch Northern Offshore and has shown real exploration potential in the Rotliegend
FIELD DEVELOPMENT & PERFORMANCE
ENHANCED GAS RECOVERY POTENTIAL
BackgroundUsing results from literature that suggest additional recovery in the range of 5-10%, the potential additional volume from NL fields is 30-60 bcm.
Research questions1. (How) can we assess the potential for EGR in gas fields?2. What factors determine the feasibility of EGR?
ApproachTwo (offshore) fields studied: one gas field, one condensate-rich fieldHistory match of reservoir model, using existing configurationModelling EGR scenarios (injectors, volumes, timing)Study only considers feasibility EGR on basis of reservoir and wells
ResultsPreliminary conclusion: mainly benefits if condensates are presentOptimum injection and production scenario based on cost / benefitLower injection rate: higher ∆RF, but gas produced laterHigher injection rate: lower ∆RF, but gas produced earlierOther success factors include permeability, depth, field size
Condensate gas field
FIELD DEVELOPMENT AND PERFORMANCE
PRODUCTION OPTIMIZATION TECHNOLOGY
TNO-Statoil cooperation on workflows for robust optimization of field development strategies and well control
State of the art, ensemble based technology largely originating from ISAPP research consortium (TU Delft, Shell, Statoil, ENI, Petrobras)
Application to field cases (a.o. in North Sea)Well drilling order optimization (scheduling),
Well scheduling and CO2-WAG optimization
Well trajectory optimization and risk minimizationValue of information (optimization of monitoring strategies)
June 13 2016
WELL AND FLOWLINE PERFORMANCE
FOAMER SELECTION LIQUID LOADING MITIGATION
BackgroundEach chemical supplier has developed their own way to select foamers.Prediction of the effect of foamers in the field and therefore comparison to alternatives is difficult.
Research questionsHow can we select the best foamer for deliquification of a specific gas well?How can we quantitatively predict their effect on gas production?
ApproachExperimental studies at lab scale and intermediate scale to evaluate the effect of variousparameters on foamer performance (temperature, tubing size, foamer concentration, liquid-gas ratio etc.Construction of a foam flow model
ResultsProposed experimental (desk top) method for foamer selectionModel for prediction
HPHT DESKTOP SCALE SETUP FOAM QUALIFICATION
05 November 2015TKI Liquid loading highlights
WELL AND FLOWLINE PERFORMANCE
SALT (HALITE) DEPOSITION
BackgroundGas production in the Southern North Sea is often impaired by halite deposition in the near well bore area
Research questionsWhere and when does salt precipitate and what is the effect on gas production?How can we optimize mitigation on short and long term?
ApproachDevelopment of a model to predict salt deposion and mitigation techniquesExperiments in porous media to assess the effect of salt deposition on fluid flowModel runs to assess the influence of control parameters on short and long term production(water wash parameters, well head control)
ResultsA dedicated model (SaltMux) was developed to predict halite salt deposion, its effect on production the effects of mitigation techniques.Core experiments were designed and performed to asses effect of salt deposition on fluid flow.Parameter sensitivities were studies in model runs.
ABANDONMENT AND DECOMMISSIONING
NATURAL SEALING FOR RELIABLE ABANDONMENT
BentoniteBentonite
BentoniteBentoniteUse natural sealingcapacity of saltand shale for well abandonment
• Modelling• Well test in
offshore well
HEALTH, SAFETY, SECURITY AND ENVIRONMENTPRODUCED WATER TREATMENTBackground
In mature gas fields, increasingly chemicals are used (liquid laoding, corrosion, scaling, etc.)These (often surface active) chemicals can stabilize condensate-in-water emulsions and or pollute the water stream
Research questionsHow can we effectively (costs, footprint) clean produced water in an offshore environment?
Approach1. Development and experimental evaluation of novel (combinations of) technologies (electro-coagulation,flat sheet membrane contactors enhanced by electrical field etc. ) for water purification2. Relate chemical structure of additives to emulsion stability / separation problems
ResultsTwo technologies will be further explored in an (on shore) pilot
INFRASTRUCTURE
SYSTEM INTEGRATION OFFSHORE WIND AND GAS
E&PE&P
OffshoreWind
OffshoreWind
Offshore ServicesOffshore Services
SIOE
Integration offshore wind parks and offshore oil and gas infrastructure
Zero emission platformsPower balancing
Energy storage (P2G, G2W)
