How many wells are in a section?
I am trying to get an understanding of how large a 40 acres plot is vs. a 640 acre section.
When I plot the well coordinates on Google earth for several wells that are in a section, It gives me the impression that 40 acres go all the way up to Shreveport. But when I plot the coordinates for a well in say another section, it appears to be only .95 miles away.
Does Sonris list every well that is in a section? Or could there be 100s of wells in a particular section?
For example, does section 24-12N-12W have anything to do with section 19-12N-11W? Can both those section be included in two different 640 acre units?
Thanks, just trying to get some clarity.
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Replies to This Discussion
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Permalink Reply by adubu on
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Ken--- 40 acres = 1,728,000 Sq Ft or 0.0625 Sq mile-- 640 acres = 27,878,400 Sq Ft or 0ne Sq mile----- the question how many well in a 640 acre unit depends on the allowable spacing for well formation drilled--- if spacing is 80 acres then 8 wells can be drilled or if 160 acres only 4 wells in unit can be drilled. Hope this answers your question
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Permalink Reply by Les Bamburg on -
Ken, Sonris lists every well that has a surface location in that section. One or more of those wells could be horizontal with the lateral drilled and producing from an adjacent section.
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Permalink Reply by dbob on
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To add, hopefully not the the confusion, you may have multiple formations that are productive in a section, such as Cotton Valley, Haynesville, and Bossier. Assuming each formation is produced on 80 acre spacing, you could have 640/80x3 = 24 wells in a fully developed section.
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Permalink Reply by Andrew on
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A 640 acre square section is 1 mile on each side. A 40 acre portion of that would be 1/4 of a mile on each side.
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Permalink Reply by dbob on
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Ken,
The surface facility for a well can be just about any size. Shallow wells generally require smaller pads, while deeper wells can require larger pads exceeding 5+ acres. Where possible and practical, multiple wells may be drilled of the same pad, such that in high density scenarios, a single, say seven acre pad, might support 6-12 wells, with net 1 acre required per well. In really high density scenarios (uncommon) you can approach 1/4 acre per well on a pad.
Or did you mean how much of the sub surface has to be allocated to a well?
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Permalink Reply by adubu on
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Ken---most well in texas have avg 40-80 acres spacing unless very tight sands --- most Horz wells are at least 80-160 acres spacing some tight sands like the CV in East Texas are 20 acre spacing--- it is base on geology of what a well can drain to deplete the formation ---this is set by the RRC of Texas
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