Hi All, Dave, Thanks for the Horvorka paper and thanks go to her for the work. I will work my way through the offered links. On first impression, I believe this type of systematic evaluation of potential sites is a good start. However, what I can see down the road is the need for continuous high level monitoring of sites which have past/current/future local fracking activity. Fracking does represent a geological wild card which can come into play long after the fracked well is shut down. The media report of seismic activity related to fracking that Andrew brought to the list http://www.bbc.co.uk/news/uk-england-lancashire-13599161
<http://www.bbc.co.uk/news/uk-england-lancashire-13599161>is a real world example of the longterm hazard. Such induced geological activity will set up longterm stress in the area that may or may not accumulate/dissipate. The potential long-term stress effect can be significantly greater, in area, than the immediate fracked well area. Also, keep in mind that if a highly pressurized sequestration "pocket" is suddenly "decompressed", that alone could trigger seismic activity in neighboring sequestration sites. I may find the following observation in the links listed and apologize in advance for speaking before reading. With that said, I would like to see the tools and methods listed in the Horvorka report used in association with well fracking. Particularly, in and around a test sequestration site that is subjected to local fracking activity. The potential cost of such a large study would seem reasonable in view of the longterm issues. Small leak detection is the mouse in the elephant herd. It was good to find that issue being addressed with specific tracers. Deep ocean sequestration has to be more reliable at geological time scales than oil fields at on a number of levels. Should a path to creating CO2 Hydrates be considered for deep ocean sequestration? http://en.wikipedia.org/wiki/Carbon_dioxide_clathrate <http://en.wikipedia.org/wiki/Carbon_dioxide_clathrate>Thanks, -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To view this discussion on the web visit https://groups.google.com/d/msg/geoengineering/-/cE5UREM2Q0JHb3NK. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
