Replies to This Discussion

Permalink Reply by Steven A Joliat on January 5, 2012 at 9:50am

This means that based on an analysis of samples of organic material present in the rocks, they do not expect significant quantities of oil and gas to be present.  The boundaries of any area are somewhat uncertain since usually the analysis is based on a limited number of samples from the area.  Temperature and pressure act on organic materials buried with sediment to create oil and gas over extremely long periods of time.  Source rocks are the material that allow the oil and gas to be created, it can then be trapped in the source rock itself, or migrate to a somewhat nearby reservoir rock where it is captured and can be produced later.  Advances in technology have allowed economic production of oil and gas from shale formations which had previously been considered as source rocks, but not reservoir rocks.   The maturity index from the map is also describing the maturity of the source rocks in the area, it does not always mean that other rock formations in the area do not have oil and gas present that could be a result of migration from a different source rock.  MIgration of oil and gas can occur both vertically and horizontally through suitable rock to arrive in a reservoir.

Permalink Reply by 0i7okn54zwbdo on January 5, 2012 at 4:23pm

Terrific explanation, Steven. As an additional note I'll point out that Devon is drilling a well in Ashland county on the furthest edge of the oil window. In fact, most maps show their well to be about a mile inside the immature zone. Once that well is drilled there will be a new data point.

Permalink Reply by 0i7okn54zwbdo on January 5, 2012 at 4:28pm

Morgan county should still be in the oil window.

Permalink Reply by brynmore on January 15, 2012 at 3:15pm

 where does ashtabula fall in this oil window?

Permalink Reply by 09bp5t05myjl3 on January 16, 2012 at 3:58am

Brynmore there are actually three areas in Ohio, the Dry gas area, (natural gas) Wet gas area & the oil area all 3 have value, dry gas is noy as desirable right now due to a glut from Marcellus in PA & WV and price around $3.00 MCF, while oil is @ $100 barrel & wet gas has to be processed but is actually the most valuable,

attached is a map ot the Area but still pretty outdated I believe it has changed several times in last year & will change 4 or 5 more times in next year as they drill, no one really know the exact boundaries

Attachments:

• Map Marcellus & Utica.pdf, 339 KB

Permalink Reply by 09bp5t05myjl3 on January 16, 2012 at 4:20am

Marcellus is more dry gas & Utica is the wet gas & Oil as I understand it

Permalink Reply by brynmore on January 23, 2012 at 12:56pm

thanks tom for your insight. i know that there are pockets that are going to be better than others but is it safe to say if you have marcellus and utica you would have greater production of the gas and oil ?

Permalink Reply by 0i7okn54zwbdo on January 23, 2012 at 4:06pm

The Marcellus and Utica overlap. In Washington county, PA there is a lot of dry gas in the Utica. In Ohio it's mostly oil and condensate. As was previously mentioned those two liquids are far more valuable than gas right now. Wet gas production looks great in Carroll county but Mahoning, Columbiana and Jefferson are lining up to be next. Marcellus in Ohio isn't nearly as desireable and production from it will be paltry compared to Utica condensate and oil.