using arcgis to identify environmental risk factors
TRANSCRIPT
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U.S. Department of the Interior
U.S. Geological Survey
Using ArcGIS to Identify Environmental Risk Factors
Associated with CO2 Storage
Mayur A Gosai & Christopher P Garrity
USGS Energy Resources Program
12 July 2011
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Energy Independence & Security Act 2007
1. The geographical extent of all potential sequestration formations in
all states;
2. The capacity of the potential sequestration formations;
3. The injectivity of the potential sequestration formations;
4. An estimate of potential volumes of oil and gas recoverable by injection and
sequestration of industrial carbon dioxide in potential sequestration
formations;
5. The risk associated with the potential sequestration formations; and;
6. The work done to develop the Carbon Sequestration Atlas of the United
States and Canada that was completed by the department.
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Carbon Capture & Storage
Geological storage:
• CO2 is injected at depths of 3,000 ft to 13,000 ft
• Storage formation must be sealed to retain buoyant CO2
• Assessment addresses buoyant and residual trapping
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Assessment
Open File Reports
Methodology • OFR 2010-1127
Individual basins • OFR 2011-xxx-A
• Series (OFRs)
• ~30
Final report • Scientific Investigations Report
• Calculations
Digital data…
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Well Density (modeling purpose)
• Automation
• Location of wells
• Leakage risk
• Geologic risk
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Well Density ¼ sq. mile aggregation
Total well count 462
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Well Density ¼ sq. mile aggregation
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IHS Energy Group
• Production & Exploration data
• Daily updates available
• Petroleum Information & Dwights (PIDwights)
• Proprietary data agreements
Information Handling Services (~1960)
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Nationwide Well Database
• 32 states (subset)
• Eastern & central (some) US
• 899,090 wells
• Gulf Coast & western US not
included…
• Large volume!
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Well Data Compilation
* Well information collected through research & literature
investigation
Database codes:
• Known to bottom in the SAU formation (K)
• Assumed to penetrate through to older rocks (A)
• Unknown bottom but known driller's total depth (U)
• No total depth (null)
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Well Density Model (ArcToolbox)
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Well Density Model Workflow
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Well Density Model Workflow (part I)
• Grid cell created
• Well data projected
• SAU projected
• Cells that intersect
SAU
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Well Density Model Workflow (part II)
• 1 to 1 join of well data
and grid cells
• “Density” field added
• Count of wells that fall
within the cell is
calculated
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Well Density Model Workflow (part III)
• Feature class is created of cell
that have a density count >1
• Output location specified
• “WELL_DENSITY.shp” created
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Well Density Model (AVI “run entire model mode”)
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Cloverly
Formation
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Crow Mountain
Formation
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Ervay
Formation
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Tensleep
Formation
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Data Availability
• Storage Assessment Units (SAUs)
• ¼ square mile well density (nationwide)
• Assessed sedimentary basins boundary
• Total Petroleum Systems (TPS)
• NOGA modified
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Web mapping deliverables
• ArcGIS API for Flex
• http://energy.usgs.gov
• Health and Human…
• Geologic CO2 Sequestration…
• Data tab
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http://energy.usgs.gov
For more information contact:
Mayur A Gosai [email protected]
703-648-6524
Christopher P Garrity [email protected]
703-648-6426
956 National Center
12201 Sunrise Valley Drive
Reston, VA 20192