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Technical options for placement of CO 2 in the maritime area by Paul Freund www.ieagreen.org.uk
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Placement of CO 2 in marine area Overview Introduction Where will the CO 2 come from? How will it be brought to site? How could it be stored? Progress Conclusions
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Introduction Responding to Climate Change Wide variety of mitigation options Capture and storage of CO 2 is one method of reducing emissions No single technique can solve the problem of climate change Capture and storage of CO 2 has potential to reduce the cost of meeting climate goals Purpose of this talk is to introduce the technology of CO 2 storage
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Global sources of CO 2 Opportunities for Emission reduction Cost of capture depends on CO 2 concentration Early opportunities in NH 3 plant, H 2 plant, etc. Emissions, Mt CO 2 /y
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Capture & Store CO 2 Example: power generation Mainly N 2, H 2 O to atmosphere CO 2 Flue gases Compression Fossil fuel combustion Turbines CO 2 Separation Storage
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CO 2 capture at AES Warrior Run
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Capturing CO 2 Other methods are under development: Pre-combustion decarbonisation Pre-combustion removal of nitrogen
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Transporting CO 2 - pipelines Photo: Dakota Gasification CO 2 pipeline: 3100 km in use today Capacity > 110 Mt/y
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Transporting CO 2 - ships CO 2 tanker: Long distance shipping could be done by tanker Construction similar to LPG tanker Δ cost Similar to long distance pipeline
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Storage of CO 2 Must be Safe and secure Verifiable Of sufficient capacity to make a difference Capable of isolating the CO 2 for 1000s of years Natural reservoirs have sufficient capacity: Geological formations Deep ocean
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Ocean storage of CO 2 Options Injection onto sea-floor Dispersion at mid-depth Formation of CO 2 -hydrate at depth Mineral neutralization All just concepts Many outstanding issues This is NOT the subject of today’s meeting
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Geological Storage of CO 2 Storage options Deep saline aquifers Depleted oil fields Natural gas fields Unminable coal measures
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Geological Storage Capacity Global Storage Potential 40 Gt CO 2 <2% of Emissions to 2050 ~ 3000 Gt CO 2 ~ 150% of Emissions to 2050 920 Gt CO 2 45% of Emissions to 2050 Comparative potentials at storage costs of up to $20/t CO 2
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Geological Storage of CO 2 Component parts: Site selection Formation depth, capacity, rock properties, location Cap-rock, faults and other penetrations Environmental impact and Risk assessments Drilling injection wells Pressurisation and Injection of CO 2 Remediation in case of leaks Monitoring During injection Once CO 2 is in the reservoir
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CO 2 Enhanced Oil Recovery CO 2 Injection Production Well CO 2 Oil Recycled CO 2
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CO 2 Re-injection – Natural Gas If natural gas contains too much CO 2, it must be removed before the gas is sent to market Current application of CO 2 Capture Established practice is to vent CO 2 after capture Better environmental practice = store CO 2 Examples: Sleipner K-12B In Salah Snøhvit Gorgon
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Sleipner project Courtesy of Statoil
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Sleipner CO 2 Injection Courtesy of Statoil Sleipner T Utsira Formation Production and Injection Wells CO 2 CO 2 Injection Well Sleipner A Gas from Sleipner Vest
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Gorgon Gas Field Courtesy of ChevronTexaco
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Gorgon LNG plant with CO 2 capture Courtesy of ChevronTexaco
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Snøhvit CO 2 Injection Courtesy of Statoil
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Snøhvit - Pipelines Courtesy of Statoil Depth: 330 m Distance 160 km
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Monitoring CO 2 injection & storage Reason for monitoring include: Establish baseline conditions Ensure effective injection controls Locate the CO 2 plume Assess integrity of wells Confirm storage efficiency and calibrate models Detect and quantify seepage / assess impacts For accounting purposes In relation to legal disputes Reassure the public about storage of CO 2
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Monitoring of CO 2 Possible monitoring techniques: Pressure - Wellhead and/or Formation Injection Rate Well Logs, Fluid and Gas Composition Seismic Monitoring Electrical and Electromagnetic Monitoring Gravity Monitoring Tilt Measurements Airborne or Satellite Imaging CO 2 Flux Monitoring Atmospheric CO 2 Concentration Micro Seismicity
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History match courtesy of Sintef Petroleum Seismic Analysis
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Conclusions Geological storage of Captured CO 2 Offers significant capacity for avoiding CO 2 emissions Would make a difference to climate change Makes use of established technologies for injection and monitoring Several examples now in operation/planned These will serve as demonstrations which will influence attitudes.
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