Random Note: Vertical Wells Into the Sanish Pool

While updating Clarks Creek oil field data, I ran across these five vertical wells, just a few miles east of Clarks Creek, all in/near section 34-152-94, Antelope oil field:

• 4168, 51, Dakota-3, Drags Wolf 1, Sanish pool, Antelope field; t12/66; cum 159K 6/12; still producing 200 bbls/month -- producing for 46 years;
• 12019, 167, CLR, Rose 1, Sanish pool, Antelope field, t1/87; cum 189K 6/12; still producing 300 bbls/month
• 12198, 357, CLR, Fox 1, Sanish pool, Antelope field, t1/88; cum 267K 6/12; still producing 700 bbls/month
• 12643, 208, CLR, Wolf Federal 1, Sanish pool, Antelope field, t8/89; cum 206K 6/12; still producing 500 bbls/month
• 12979, 192, CLR, Gudbranson 1, Sanish pool, Antelope field, t11/90; cum 104K 7/12; still producing 500 bbls/month

Note the pool: the Sanish. For whatever it's worth, but note that the first well mentioned has been producing for 46 years; the others, at less than 25 years, are a lot younger.