Lessons Learned: IEAGHG Weyburn-Midale CO2 Monitoring ... and Steel Presentations/1… · Lessons...
Transcript of Lessons Learned: IEAGHG Weyburn-Midale CO2 Monitoring ... and Steel Presentations/1… · Lessons...
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Lessons Learned: IEAGHG Weyburn-Midale CO2 Monitoring & Storage
Research Project
Steve Whittaker, PTRC/GCCSI Neil Wildgust, IEAGHG/PTRC
Industry CCS Workshop, Dusseldorf, November 2011
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CO2 Source: Great Plains Synfuel Plant
• 250 mmscfd CO2 by-product of coal (lignite) gasification
• approx. 8000 tonnes/day suitable for EOR
• CO2 purity 95% (less than 2% H2S)
• 180 mi pipeline (14 in & 12 in) built & operated by Great Plains
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Research Project Objectives
Technical Components • Site Characterization • Monitoring • Wellbore Integrity • Risk & Performance
Management
Policy Components • Regulatory Issues • Public
Communications & Outreach (www.ccs101.ca)
Best Practice Manual Sept 2011
Transition of CO2-EOR
Operations to CO2-storage
Pre-injection, Operations,
Post-injection, Closure
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SITE CHARACTERIZATION
ALBERTA MANITOBA
MONTANA
WYOMING SOUTH DAKOTA
NORTH DAKOTA
EDMONTON
SASKATOON
WINNIPEG REGINA
HELENA
BISMARCK
PIERRE
CALGARY
WILLISTON BASIN
HUDSON BAY
SASKATCHEWAN
WEYBURN
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Weyburn Midale
6500 tonnes/day new CO2 6500 tonnes/day recycled
CO2 2.4 MT/year
~ 18 MT Stored
1250 tonnes/day new CO2 400 tonnes/day recycled
CO2 0.46MT/year
~ 2.5 MT Stored
Weyburn-Midale Area
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Reservoir
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• Industrial amounts of anthropogenic CO2 can be injected into geological formations
• ~ 5.6 MT annually (new & recycle)
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Storage Estimates
18
Weyburn & Midale will store CO2 equivalent to removing about 9 million cars off the road for a year
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Multiple Stakeholders
• Region is comfortable with CO2-EOR
• Long-term storage, however, still an uncertain concept
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Key Stakeholder Questions
• Where will CO2 go after injected?
• Can it escape?
• How will it be monitored?
• If it migrates, can it be contained?
• Will it cause or be affected by earthquakes?
• Liability – Regulation
• Effect on reputation of the area
• How will community be engaged?
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The One Stakeholder
• the influence of a single stakeholder may have significant impact on project (and beyond)
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Communications
• Have a plan
• Press is ready to sensationalize
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Monitoring
• usefulness (necessity?) of baseline surveys
• seismic
• reservoir fluids
• soil gas
• groundwater
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Seismic Monitoring
• 4D seismic can be successfully deployed on land
• can describe CO2 distribution in subsurface
• Still a challenge to quantify amounts
• Reservoir specific rock physics an asset
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Time-lapse 3D seismic
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Passive Seismic
• Continuous monitoring since 2003
• Little microseismic activity resulting from injection of CO2
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Reservoir Fluid Monitoring
• monitoring of brine chemistry can identify movement of CO2
• changes in brine chemistry provide insight into rock-CO2 interactions in the storage complex
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Site Characterization
• Regional perspective critical for understanding long-term storage
• Natural Analog
• Hydrogeology of storage complex is important
• Discontinuities are difficult to characterize
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Regional Hydrogeology
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Performance Assessment
• variety of methods of RA used: probabilistic & deterministic; FEPs - Expert Judgment – Bowtie – Percolation Modeling: all are instructive exercises
• Weyburn has a very favorable risk profile
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Wells
• Wells are the highest risk
• Wells are a manageable risk
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Well Integrity Program
• Logging
• Cement samples
• Pressure Transient Tests
• Mini-frac
• Fluid sampling
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What Else?
• how to most effectively monitor large land areas - what spacing - what frequency?
• what are threshold detection levels for different monitoring techniques
• How to re-engage press and public
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THANK YOU
ACKNOWLEGEMENTS
• ALL SPONSORS
• ALL RESEARCHERS INVOLVED DURING THE PAST 10 YEARS