Shale gas and earthquakes

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bernardd
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Shale gas and earthquakes




by bernardd » 21/02/11, 10:49

Deep water injections are now well known for causing earthquakes, particularly for shale gas extraction:
http://www.dailymail.co.uk/sciencetech/ ... -days.html


This also applies to deep geothermal energy with fracturing. The last example was in Bern, Switzerland:
http://www.swissinfo.ch/fre/actualite/U ... id=5618194
http://resosol.org/SolGeo/Sol_geo07.html#suissejanvier
http://resosol.org/SolGeo/Sol_geo07.html#suissemars

In the event of an earthquake, who will be responsible for the damage and who will pay?
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by dedeleco » 21/02/11, 13:54

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by Former Oceano » 21/02/11, 18:12

This has been shown on a lot of seismic studies after the impoundment of the dam.

On the one hand there is the weight which varies in the impacted area (positive due to the weight of the water on the surface or injected into the soil) and on the other hand due to the lubrication that the water provides between the faces of a fault or crack.
It has been shown that the great earthquake a few years ago (Sichuan if I remember correctly) was due to the impoundment of a giant dam.

So there will necessarily be micro earthquakes, even earthquakes of low amplitude. It remains to be seen who will pay or whether we will have to adapt the construction standards.
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by jessle » 21/02/11, 22:40

Not far from Basel

The small town of Staufen in Baden-Württemberg sees these houses cracking following geothermal drilling. The basement has been swelling since 2007, and it goes on and on.

http://www.arte.tv/fr/Comprendre-le-mon ... 86544.html

we're talking about 50 million euros of damage
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by sherkanner » 22/02/11, 08:43

Finally, it's not just Basel, all the HBLs are affected (coal mines in the Lorrain basin).
http://www.liberation.fr/societe/010148 ... e-guingois

And shale gas is going to give us exactly the same problem.
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by bernardd » 22/02/11, 09:18

former oceanic wrote:This has been shown on a lot of seismic studies after the impoundment of the dam.

On the one hand there is the weight which varies in the impacted area (positive due to the weight of the water on the surface or injected into the soil) and on the other hand due to the lubrication that the water provides between the faces of a fault or crack.
It has been shown that the great earthquake a few years ago (Sichuan if I remember correctly) was due to the impoundment of a giant dam.


Thank you, I forgot then that it is still the most significant example.

former oceanic wrote:So there will necessarily be micro earthquakes, even earthquakes of low amplitude. It remains to be seen who will pay or whether we will have to adapt the construction standards.
that we will have to pay too ...

Long live biomass pellets and vacuum solar thermal collectors!
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by dedeleco » 22/02/11, 13:29

Long live the inter-season storage of summer solar heat (even with simple collectors without vacuum) underground to heat up in winter without ever more CO2, spending, in perpetuity, as it works in Canada see:
http://www.dlsc.ca/DLSC_Brochure_f.pdf
http://www.dlsc.ca/how.htm
http://www.dlsc.ca/borehole.htm
for a non-excessive price, without the risks of Chernobyl in France, radioactive waste, release of CO2, fuel prices which rise much faster than wages, heating appliances quickly broken down (case of heat pumps) , nor effects of earth movements, because at shallow depth locally without injecting water into the soil, unlike shale gas and deep geothermal energy.

It's the future decades ahead, because perpetual heating without CO2, without the expense of changing a dead boiler, usable without pushing the insulation to the maximum, collectively in small residences for a price comparable to current installations if developed and carried out commonly.

Since it is the end of the dependence of any centralized supplier, it is never presented in France and systematically disparaged by those, who would lose their power.
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by sherkanner » 22/02/11, 13:46

dede, I agree, this is the ideal solution, only the price of drilling at 35m deep is quickly prohibitive. The proposed solution requires a lot more (one every 2.25m).

(if I remember correctly, the price of a borehole varies from € 30 to € 200 per linear meter depending on the soil, earth, rock, etc.). A real investment to think about carefully. A preliminary soil study is necessary.
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by dedeleco » 22/02/11, 16:22

It is the price of a well at 90m, price which can be greatly reduced if we want to develop it, for almost nothing in research compared to the costs of a nuclear power station, for a perpetual heating energy !!
In clay or alluvial soil an auger drills quickly for not expensive at all (for soil study) and a soil study costs very little (a stove), and it is recommended for new house foundations anyway to avoid future cracks !!
The drilling diameter can be greatly reduced.
The price of drilling is above all the cost of workers' wages !!

The final benefit, for life, never again of CO2, nor of polluting heating, to change and maintain etc ... is worth it.

We will have to make this heating system in a few decades, with the seas rising inexorably, endlessly, if we continue to burn everything that can be burned in our underground, because there is enough to multiply by 10 the terrestrial CO2 (as 55 million years ago) and then the catastrophic warming will be irreparable.

So we have to stop saying it's impossible, too expensive, (the price of a well at 90m = 3x30), bad arguments that do not look at the immense possibilities of reducing the price, in large series, for perpetual heating.

BBC insulation is also too expensive (+ 20%) in my opinion comparable to that of this perpetual heating.

Personally the current solutions have a limited lifespan and therefore we look at it several times, since 10 years later we will have to pay full price, used or obsolete technology (my case experienced).

If, the solution is perpetual we will look less at the expense !!
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by the middle » 29/04/11, 08:00

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