Trenton Limestone

 If a well permit list the target area as the Trenton does that mean they are going to drill through the Utica  into the Trenton or just to the Trenton.

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Permalink Reply by Bill Barnaby on October 29, 2014 at 8:59am

Without knowing exactly where the trenton is, your question confused me, if they go to the trenton they have to go through the utica. Do you mean, are they going to drill horizontally on the utica and trenton?

Permalink Reply by Bob on October 29, 2014 at 12:28pm

Most wells being drilled around here are Utica wells,  The Utica shell is above the Trenton, so if a request for a permit list the Trenton as the target area are they bypassing the Utica with the vertical  runs and going vertical in the Trenton.?

Permalink Reply by Robert Alexander on October 31, 2014 at 11:43am

Rumor is seismic testing will be occurring in March testing a shale below the Utica that may be the Trenton Black River. Testing being done in Carroll, Harrison, Tusc..., Belmont etc...

Permalink Reply by Philip Brutz on October 29, 2014 at 1:29pm
Permalink Reply by jason irvine on October 29, 2014 at 12:38pm
I heard they are going to explore the deeper trenton. Were is this permit for?
Permalink Reply by Bob on October 29, 2014 at 1:26pm

This is for a Eclipse well that is suppose to be a Utica well in Monroe county. Just didn't understand why the target area was Trenton.  Do all the Utica permits say Trenton?

Permalink Reply by KAR on October 29, 2014 at 3:18pm
Do you have a copy of the application? If you do, check to see if it is marked as stratigraphic for the permit type. Operators apply for Stratigraphic permits so they can drill straight down and run logs on the rock in that area. Usually they'll do this for wildcat wells. They do not plan to produce this and most likely will plug back and then drill
the horizontal in the Utica/Pt. Pleasant formation to produce gas and oil.
Permalink Reply by Bob on October 30, 2014 at 3:34am

It does say stratigraphic.  Thanks

Permalink Reply by Jack Straw on October 29, 2014 at 5:08pm

Re: "If a well permit list the target area as the Trenton does that mean they are going to drill through the Utica  into the Trenton or just to the Trenton."

My take on the above:

The Trenton Limestone lies directly below the Utica Shale.

To know at exactly what depth the base (bottom) of the Utica Shale resides, you have to log a full suite of logging tools through the base of the Utica; to do that you have to drill into the Trenton.

Also, there will be debris that falls into the bottom of the hole.

So, you tend to drill 60 - 90 feet below the deepest rocks that you are interested in.

This last bit of hole (beneath your maximum area of interest) is lovingly referred to as the "Rat Hole"; just some additional hole to accommodate logging tools and a repository for anything that might slough off into the hole.

All IMHO,

                 JS

Permalink Reply by Nancy Mosley on October 30, 2014 at 3:30am

Thanks Jack. You are very good at explaining things. And I had heard the term "rat hole" but now I know what it means!

Permalink Reply by Bob on October 30, 2014 at 3:36am

Thanks Jack

Permalink Reply by Nancy LeNau on October 30, 2014 at 2:50pm

Thank you Jack.

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