For the life of me I could not figure out why no one has yet to drill horizontally in Ashtabula Co. when the maps show it a good area.
Been doing a lot of reading on the internet and came across this article from March 2002 in the Geotimes.
http://www.geotimes.org/mar02/NN_quakes.html I'm just wondering if this is why there hasn't been any drilling in Ashtabula? Is Ashtabula high risk for this type of deep drilling? I hope this isn't the case but after reading this it kind of makes me wonder.
I have seen this happen in northwest PA. Midina wells drilled deeper than the Marcellus. The frac migrated to the Midina wells. Had to stop the frac and plug Midina wells. Then frac the last stages of the Marcellus well.
ji and deer spotter,
I guess you fellas mean damage to the 'production string pipe' since it's also written above that there is no 'casing pipe' or 'cement' through the Utica (just the 'production string pipe').
I think I got it.
It sounds like there's no telling where any (older) gas / oil well vertical (passing through the Utica) may be jeopardized by a new Utica frac. operation (or any interval being frac'd. anywhere and not just in Ashtabula County).
J-O The damage was not to the Midina wells. Could not get pressure to frac the Marcellus do to the migration of the frac into the Midina wells.The Midina wells are a sandstone formation between the Marcellus and Utica here in northwest PA. Appox. 5000'.
OK, so you found loss of frac. pressure to be the problem (until your outfit plugged the Medina wells).
Then it was ji who expressed concern about damage (to the 'uncemented production pipe' or 'uncemented production casing').
Spelling award to J-O for "Medina". The Medina in PA and NY is the equivalent of the Clinton in OH. Thousands of Medina wells drilled for gas in western NY and NW PA, gets quite shallow near Buffalo, NY, maybe 2000 ft?
Based on all I've read, FWIW, my humble opinion is that Ashtabula County's earthquake risk (due to Utica Point Pleasant development) would be no greater than any other similar County's risk as I don't believe Ashtabula County is defined as being in an earthquake prone zone for one big reason.
Also IMHO and FWIW, the concern over hydrocarbon migration into other nearby shallower or deeper bores and / or damage to nearby gas and / or oil wells / production casings due to pressurizing and fracturing the Utica Point Pleasant to me poses no greater or lesser risk than has been taken and addressed elsewhere in the play.
Also IMHO and FWIW, damage to private domestic water wells / reservoirs / aquifers due to the fracturing processes is of greatest concern and that eventuality can't / shouldn't be permitted to occur and always needs to be precluded from occurring.