Fracture patterns and their origin in the Upper Devonian Antrim
Shale gas reservoir of the Michigan basin: A review Robert T.
Ryder Open-File Report 96-23 PATTERNS OF GAS PRODUCTION AND
CHEMISTRY OF ASSOCIATED RESERVOIR WATER The influence of
fractures on gas production is demonstrated by a plot of
fracture frequency, measured from fracture-detection logs in
three wells in Otsego County, against gas production from these
wells (Decker, 1992). The plot shows a direct relationship
between fracture frequency and gas production. The three wells
used in the plot were also used in fracture studies by Decker
and others (1992) and Caramanica (1993). Gas production from the
three wells, measured over 24 hours, ranged from 243 to 500
thousand cubic feet of gas per day (MCFGPD). Accompanying water
production from the wells ranged from 25 to 85 barrels of water
per day (BWPD). All the wells are vertical, received similar
stimulation treatment, and were tested for their gas yield at
similar times in their production histo