reply to post by Labrynth2012
All I can say, living in the West Texas Oil Fields for most of my life, is that FRACKING gets the job done. I have yet to see any hard tangible
proof that FRACKING causes earthquakes. All I have seen so far is a "liberal" view of possibilities but no proof to back it up or support
Indeed fracking does get the job done, no one is denying that. If by "liberal" you are referring to people with a certain political viewpoint then all
I can say is I see no political references in the data that shows me that the authors are "liberals"
From Texas - The University at Austin.
Fracking Earthquakes: Injection Practice Linked to Scores of
Unusual Dallas Earthquakes Linked to Fracking, Expert
Most earthquakes in the Barnett Shale region of North Texas occur within a few miles of one or more injection wells used to dispose of wastes
associated with petroleum production such as hydraulic fracturing fluids, according to new research from The University of Texas at Austin. None of
the quakes identified in the two-year study were strong enough to pose a danger to the public.
- this looks like it is an update to the first.
Fracking Tied to Unusual Rise in
Earthquakes in U.S.
Researchers from the U.S. Geological Survey said that for the three decades until 2000, seismic events in the nation’s midsection averaged 21 a
year. They jumped to 50 in 2009, 87 in 2010 and 134 in 2011.
I am not sure if these people are liberals or not, but really it is sort of irrelevant as the facts are that fracking, or rather the disposal of waste
fracking water in old wells, does cause earthquakes. I rather think that yours or anyone else's political views have very little to do with it.
While I would agree that if you empty a cavern full of oil out of the ground and replace it with nothing, leaves an empty open pocket for the
ground to sink into. Backfilling that empty cavern with fluid or solid material would keep it from caving in.
Apparently although you live in one of the major oil producing regions of the world and the place where VERTICAL fracking was invented (in the Barnet
shale fields) you seem to have taken very little time to learn about oil and the geological formations in which it occurs.
In the US most of the oil production is from shale fields. This is gas and oil trapped in pervious rock (shale) that can be easily fractured and which
is prevented from rising to the surface (as in oil/tar sands) by a layer or layers of impervious rocks above it. There is no cavern. The oil is borne
IN the rock.
Oil can be extracted from shale without fracking. Fracking is used to squeeze the barrel. Just wanted to make that clear.
It opens up fields that would otherwise unobtainable or uneconomic.
I offer you a very good site about oil shale in Kimmeridge, Dorset, England. This not an area that is hydraulically fractured, the oil is extracted
buy using 'nodding donkeys'. I know this site well and have studied it myself.
Kimmeridge oil shale
The reason I am posting this is because it demonstrates clearly the layers needed for oil shale entrapment.
Oil/gas trapped due to synclines/anticlines (think of sine waves in the rock) may well be in a 'cavern'. Oil/gas trapped due to faulting is similar,
but note this is a fault trapping oil and pressure differentials may affect the fault.
Google images for oil in anticline
should be the third entry.
Earthquake techtonics are alot different and go very deep into the ground.
Earthquakes occur anywhere between (generally) 0.5km and 70 km. There are much deeper ones of course. Oil/gas fracking wells are between (generally)
3000ft and 25000 ft or around 0.5 to 5 miles deep which is 0.8 to 8 km deep and well within earthquake range.
A little research on a subject goes a long way to preventing yourself from making statements that are patently wrong.
edit on 24/10/2012 by PuterMan because: to add more information