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Re: FW: Sequestration / nuclear option
At 11:30 PM 12/10/2003 -0600, Kai Kaletsch wrote:
>John,
>
>If this was permanent, wouldn't there be a lake of CO2 at the bottom of the
>ocean right now? It would have gotten there from undersea volcanic activity.
>
>My guess is that CO2 dissolves and diffuses to the surface.
>
>Kai
>
>From: "John Andrews" <andrewsjp@chartertn.net>
> > Seems to me the deep sea injection of the liquid CO2 would be simpler
> > and just as permanent. Perhaps mechanically simpler, too. As I
> > understand it, the CO2 is liquified, then injected at a depth where the
> > pressure is sufficient to keep it in liquid form. It then sinks to the
> > bottom because it is heavier than water. It is an interesting concept.
Kai: At the depths envisaged, I imagine the CO2 would form hydrates -
effectively dry ice - on the sea bottom. This would be pretty stable and
not prone to dissolution/diffusion.
In fact, there are many large "lakes" (rather icebergs!) on the ocean
bottom (including right here in the Gulf of Mexico!),containing not only
CO2, but methane, pentane and other light hydrocarbons! That are indeed at
the moment being seriously looked at as a source of energy!
If you "Google" hydrates you will find lots of information on naturally
occurring hydrates.
As for the comment that dumping the CO2 into depleted oil reservoirs, this
would have the potentially beneficial effect of maintaining the normal
pressure of the reservoir and stability of the formations above it. Surface
subsidence caused by oil and gas production is a significant problem in
many areas of oil production. E.G. the coast of parts of Lake Maracaibo
have had to be dyked, as the ground level is many feet below the lake surface!
Regards
Doug
Doug Aitken Schlumberger Drilling and Measurements QHSE
Advisor
Phone (Sugarland): 281 285-8009
Phone (Home office): 713 797-0919
Phone (Cell): 713 562-8585
Principal E-mail: jdaitken@earthlink.net
Schlumberger E-mail: daitken@sugar-land.oilfield.slb.com
Mail: 300 Schlumberger Drive MD2, Room 111
Sugar Land, TX 77478
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