at 20-50 bcf in THIS well, the company has the acreage to sink...

at 20-50 bcf in THIS well, the company has the acreage to sink 30-40 wells, which would take the prospect to 2.5tcf or so

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finding a totally new additional 20~50bcf gas reserve on 30~40 wells while they are spaced 30~40ha?

it's a bit unrealistic. I'll rather expect to find 5 x 20~50bcf and drill 4~5 wells for the each reserve found. and prob. a couple of them hits a huge gas show at leadville and possibly double the reserve total.

that'll come to 300~500bcf for the whole.