The wells I'm thinking of would have been offsets to existing production, in-field drilling, or even wildcats. Production gradually reduces formation pressures, resulting in less future production. We were working at quite a bit greater depths and hence had greater pressures to start with. I tried to peddle prospects in eastern Kansas to our company (prospected as far east as the Winterscheid pool, which is still west of Hemi's area) but this part of the state was derided as the "stripper area", i.e. too shallow, full of decrepit old non-productive wells, and not worth botheering with.
I wasn't involved with well completions but I don't believe they did much more than acid treat formations like the Mississippian (limestone, dolomite). I believe that Hemi's modern completion/stimulation techniques are what make all the difference.
As I understand it, Hemi is focused on old-field redevelopment rather than wildcat drilling. If they can bring in a 68 BOPD well in an 80 year old field, they don't need to do very much wildcatting at long odds.
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