(a) A well drilled into a gas cap for gas recycling purposes is found to be in an isolated fault block. After injecting 50 MMSCF (14.7 psia and 60 oF), the pressure increase from 2500 to 3500 psia. Deviation factors for the gas are 0.90 at 3500 and 0.80 at 2500 psia and the bottom-hole temperature is 160 oF. What is the cubic feet of gas storage space in the fault block?
(b) If the average porosity is 16 percent, the average connate water is 24 percent, and average sand thickness is 12 feet, what is the areal extent of the fault block?