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Permalink Reply by Sylvester Deal on February 17, 2014 at 7:06am

Kathleen,

The units referred to on the completion report are qualitative in nature.  As the units go up the gas concentration is higher.   In mud drilled wells, units can be dependent on things such as drilling rate, formation quality, or crossing a fracture.  They are a first indicator of pay quality but not a final indicator of well production capability.  In this case, the lateral average of >1000u doesn't tell you much more than the lateral is in the pay and it's higher than other values from the vertical section.

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Permalink Reply by Kathleen on February 17, 2014 at 7:44am

Thanks. That's interesting.
I've never seen these reports placed on this site.
Just so people know, this type of report is on every well if they have a completion report.

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Permalink Reply by Brian Powers on February 17, 2014 at 8:17am

Kathleen -

The first thing that I noticed was the word "Preliminary" handwritten at the top of the page. I'd guess that this well was drilled but has not yet been fraced, flared or put into production ready status. As Sylvester correctly indicates, units of gas recorded by the mud loggers are qualitative, and probably measured the methane component only. If the gas phase were further broken down to measure ethane, propane, butanes and heavier phases, a presentation of the phases by depth can sometimes indicate if the hole is in the wet gas or oil window.

The report gives surface coordinates, a legal description of the well pad, and summarizes the casing/cementing used during well construction. It also gives a basic description of the drilling fluid, which was a water based gelled mud with shale chemical inhibitor and ground up walnut hulls (nut plug) to reduce or prevent mud seepage losses while drilling. Gas is much less soluble in water based drilling fluid than it is in oil based fluids; this supports Sylvester's comment about qualitative vs quantitative readings,

Brian 

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Permalink Reply by Kathleen on February 17, 2014 at 8:35am

Hi Brian,

That well was fracked before the stamp date and was done right about the time it was dated by the analyst. To my knowledge it was never flared.
Something else I don't understand, is why do some drillers offer up this info why others do not?
Gulfport so far from my research does not while CHK does. So far I've only looked at the Boy Scout wells, Wagner and I think Kinsley. The rest I've looked up,are CHK wells and they all,have this info.
I'm also noticing some wells have a lot more information submitted to the ODNR then others.

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Permalink Reply by Brian Powers on February 18, 2014 at 2:54am

Kathleen-

The regulators all have a minimum amount of required data for each completion form; some operators provide the minimum data, some don't. I've seen the civil servants in the regulatory agency reject these forms until their requirements were met.

In my last job, I reviewed and quality controlled these forms until they were ready to submit. We added some more information, including a simple wellbore schematic, to make the form even more useful.

Brian 

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