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Cowboy Up !

One Well, One Trillion Cubic Feet of Probable EUR


This photograph was taken near Boulder, Wyoming, I suspect looking northwest toward the Bridgers. Robert Flaherty is an old San Marcos, boy, actually. I bought lots of stuff from him but did not ask his permission to use this photo, sorry, Robert.


Not too far between here and the mountains is the Green River Valley that has some wild, tough fishing in it. Sublette County, Wyoming is not for weenies. It's hard country.


The Tetons and beyond is the country that Hugh Glass got chomped in.


If you catch a cutthroat trout in this area on a tiny fly, his great, great grandparents may not have EVER seen a human being before.


In this country to get anywhere, honorably, you walk, forever, or ride on horseback, forever, expecting the worse weather you can imagine hitting you smack in the face any minute. If your fingers freeze off holding reins in a blinding snowstorm, it must be early August in Wyoming.


Out there not too far away from where this photograph was taken is Exxon's Lake Ridge Gas Field, discovered in 1981, Field development was delayed for environmental reasons and location issues in the Bridger-Teton Park, for natgas price reasons, you name it. Exxon finally got around to putting these wells online in 1985 and Whoa Nellie! You are not going to beeelieve these wells.


All those Appalachian Basin dudes that think $12MM, 15 BCF wells are cause to howl at the moon will drool over these wells.


Or not. These wells will likely make them grumpier than they already are.


These are real gas wells...


Click to enlarge all this stuff
Click to enlarge all this stuff

Six (part-time) producing wells brought to bear since 1985 -1988, or thereabouts, completed in the Madison formation at 14,000 feet TVD, have produced a little south of 2.7 TCF. Think about that a second. Or just look at these cumprods to date:



No. 710. Yes, Martha, that is 570 BCF to date.
No. 710. Yes, Martha, that is 570 BCF to date.
There is 700 BCF well in this field that EURs out at 1 TCF; this one above is sort of mediocre.
There is 700 BCF well in this field that EURs out at 1 TCF; this one above is sort of mediocre.

Field decline?
Field decline?

I can't get my DCA stuff to work because I can't sort out what the decline rate is, if there is one. I tried a best fit and a modified hyperbolic fit, above. None of it looks right. I am familiar with the Madison formation in Wyoming, and these Exxon wells will still produce much needed natural gas for America when the Jetsons run out of fuel, whatever it was.


Exxon, I believe, has shut in some of these wells likely because they make too much gas for anybody downstream to manage, and all of its pending permits appear to be short-lateral HZ to deviated wells from common pads, I'm sure to please the Feds and limit its footprint in the park. When they are ready Exxon will drill all those approved permits.


I am not sure what these wells costs but 14,000 feet TMD is way shorter than the Marcellus wells they are drilling recently that decline like a black diamond ski slope. Remember, at over 6,000 feet of surface elevation the Madison formation in this field is only 8,000 feet below sea level. They would likely have had to clean these wells up with acid after perforating, that's all. No frac'ing required.


It must be nice to have this sort of gas field tucked away for a rainy day.


I've got some better gas wells to show you some day.

762 Views
Mike
Mike
2 days ago

I got negative comments about this post, actually; all from tight shale oil and tight gas folks who failed to see the correlation between 5-7 BCF Marcellus wells costing $10MM each... to these wells in the PRB.


Its a tough world out there when trying to show perspective. 😎

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