SLIDE 1
Petron, 2013 Leak rate <1% ensures shale gas less of a GHG source than coal/oil
(e.g. World Resource Institute, 2012) CH4 GWP
- 72 (20 yr)
- 25 (100 yr)
Illangasekare et al., 2013 CH 4 GWP 72 (20 yr) 25 (100 yr ) - - PowerPoint PPT Presentation
Illangasekare et al., 2013 CH 4 GWP 72 (20 yr) 25 (100 yr ) - - PowerPoint PPT Presentation
Illangasekare et al., 2013 CH 4 GWP 72 (20 yr) 25 (100 yr ) Petron, 2013 Le ak rate <1% ensures shale gas less of a GHG source than coal/oil (e.g. World Resource Institute, 2012) Fisher and Warpinski 2012 Kohlbecker, GSI 2011
SLIDE 2
SLIDE 3
Fisher and Warpinski 2012
SLIDE 4
Kohlbecker, GSI 2011
SLIDE 5
Mixing between in-situ bacterial methane and thermogenic methane
from an accumulation at depth results in a wide variation in methane isotope signature
100 200 300 400 500 600 700 800 900 1000
- 90
- 80
- 70
- 60
- 50
- 40
- 30
Methane Concentration (mg/L) d13C (per mil)
THERMOGENIC END-MEMBER d13C=-38.3 0/00, C=931 mg/L BIOGENIC END-MEMBER d13C=-88.4 0/00, C=20 mg/L
Data from: Early and others (1996)
Kohlbecker, GSI 2011
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Kohlbecker, GSI 2011
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Low Frequency ….but many wells
Drilling Wells Completed Wells Wire- Line Logging Wells Well Workover Shallow Gas Drilling Wells Shallow Gas Exploration Wells Surface Blowouts Subsurface Blowouts Surface Blowouts Subsurface Blowouts 6.0E-05 9.7E-05 6.5E-06 1.8E-04 4.7E-04 7.4E-04 6E-04 9.8E-04
OGP, 2010
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