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Permalink Reply by jffree1 on July 21, 2019 at 2:55

I've noticed it but don't know what it designates. I thought it was just a BP thing, at first, but then Aethon permitted one with that same HU. I'll send an e-mail to RRC and see what they tell me.

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Permalink Reply by James L. Williams on July 21, 2019 at 3:48

Thanks. I recall that when Cabot Oil and Gas drilled the vertical well von Goetz #1 about two miles north of the Thomas cemetery on HWY 21 about 9 or 10 years ago, that on the next earnings call the President of Cabot said in response to a question that the shale was over 900 feet thick and had 9% gas bearing porosity. And that they couldn't tell the difference in the Bossier shale and the Haynesville shale. That made me think that it might be possible to have wells at three different levels instead of just two.

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Permalink Reply by Skip Peel - Mineral Consultant on July 27, 2019 at 5:09

There is usually about 500' of separation between the Bossier which is the basal member of the Cotton Valley Sand Group and the Haynesville.  Where either is sufficiently thick, say 300' or more, it is possible to have more than one "landing zone".  As operating companies learn how their frac cylinders propagate, the may adjust their lateral landing zones.  In some parts of NW LA there are upper and lower Haynesville wells.  At first it seemed that operators might be labeling the Bossier as upper Haynesville but that does not appear to be the case now as there is insufficient separation between the two zones.As far as I know these instances are not wide spread.  It should be noted that the current completion designs with high intensity stimulation can break more rock and create a larger frac cylinder.  This also informs the preferred landing zones.

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Permalink Reply by William C. Morrison on July 27, 2019 at 4:35

Check out the SONRIS dictionary.  It may have the answer for you.

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