Geologic storage02

322 views
268 views

Published on

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
322
On SlideShare
0
From Embeds
0
Number of Embeds
6
Actions
Shares
0
Downloads
14
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Geologic storage02

  1. 1. Geologic Storage of CO 2 : Leakage Pathways and Environmental Risks <ul><li>Michael A. Celia, Catherine A. Peters, and Stefan Bachu </li></ul>Princeton University and Alberta Geological Survey May 2002
  2. 2. CO 2 Injection and Trapping Mechanisms Stratigraphic Trapping Solubility Trapping Mineral Trapping Hydrodynamic Trapping Precipitated Carbonate Minerals ~800 m Confining Layer(s) Injection Well Supercritical CO 2 Dissolved CO 2
  3. 3. Research Questions <ul><li>How effective are the various trapping mechanisms? </li></ul><ul><li>What is the likelihood and magnitude of CO 2 leakage? </li></ul><ul><li>What are the environmental impacts of CO2 leakage? </li></ul><ul><li>Today: Solubility trapping </li></ul><ul><li>Today: Abandoned wells </li></ul><ul><li>Today: Mammoth Mtn, and groundwater quality </li></ul>
  4. 4. Simulation of Injection of Supercritical CO 2 <ul><li>TOUGH2 Simulator </li></ul><ul><li>Radial symmetry </li></ul><ul><li>Isothermal conditions </li></ul><ul><li>Confining layer permeability of 0.1 mD </li></ul><ul><li>Target formation porosity 10% and permeability of 100 mD. </li></ul>CO 2 injection = 20 kg/s 50 m 10 m 790 m CO 2 Brine
  5. 5. Simulation of Injection of Supercritical CO 2 <ul><li>After 4 years of CO 2 injection </li></ul><ul><li>CO 2 injection combined with injection of brine above the confining layer </li></ul>Radial distance [m] Depth [m] Mass of CO 2 /Volume [kg/m 3 ] Q brine = 40 kg/s Radial distance [m] Depth [m] Mass of CO 2 /Volume [kg/m 3 ]
  6. 6. Simulation of Injection of CO 2 Dissolved in Water <ul><li>After 1 year </li></ul><ul><li>After 50 years </li></ul>seal Total Mass CO 2 injected = 3.1x10 7 kg seal Total Mass CO 2 injected = 1.2x10 9 kg Mass of CO 2 /Volume [kg/m 3 ] Mass of CO 2 /Volume [kg/m 3 ]
  7. 7. Leakage Pathways and Trapping Mechanisms Injected Carbon Dioxide Surface Ecosystems Confining Layer(s) Atmosphere lateral migration Localized vertical migration fractures, faults, wells Potable Water
  8. 8. Leakage Pathways: Abandoned Wells in the Alberta Basin
  9. 9. Simulation of leakage through a single abandoned well <ul><li>Permeability of a typical well cement ~ 10 -17 m 2 </li></ul><ul><li>Permeability of a medium sand ~ 10 -10 m 2 </li></ul>Depth [m]
  10. 10. Potential Effect on GW Quality -50 50 150 250 distance, m 2 yr. 4 yr. 6 yr. 8 yr. 10 yr. groundwater flow CO 2 leakage deep brine aquifer drinking-water aquifer 0.0E+00 3.0E-08 6.0E-08 9.0E-08 1.2E-07 Pb 2+ concentration, mol/L
  11. 11. <ul><li>On the Long Valley Caldera in eastern California </li></ul><ul><li>Soil gas surveys revealed CO 2 concentrations as high as 95%. (CO 2 concentrations > 10% toxic to humans.) </li></ul>Mammoth Mountain
  12. 12. Changes in Metal Uptake in Plants Elevated soil CO 2 Ca 1989 Zn Mn c b 2001 Ambient soil CO 2 Mn Zn Ca 1989 2001
  13. 13. Acknowledgements <ul><li>Funding from BP and Ford . </li></ul><ul><li>Equations of State: R. Bruant </li></ul><ul><li>TOUGH2 Simulations: A. Guswa, S. Gasda </li></ul><ul><li>Leakage Estimates: A. Duguid </li></ul><ul><li>Groundwater Simulations: P. Jaffe, S. Wang </li></ul><ul><li>Mammoth Mountain: S. Myneni, S.J. White </li></ul>

×