connate water saturation of 23%. The gas volume factor at 4200 psia is 0.003425 and
ft³
SCF
ft³
SCF
at 750 psia is 0.01852
a) Calculate the initial gas in place (GIP) in standard cubic feet (SCF) on a unit basis.
b)
Calculate the initial gas reserve in SCF on a unit basis, assuming an abandonment
pressure of 750 psia.
Explain why the calculated initial reservoir depends on the abandonment pressure.
Calculate the initial reserve of a 640-acre unit whose average net productive formation
thickness is 34 ft, assuming an abandonment pressure of 750 psia.
e) Calculate the recovery factor based on an abandonment pressure of 750 psia.
c)
d)
4.1
Fig: 1