The following reservoir data were estimated from subsurface maps, core analysis, well tests, and fluid samples obtained at several wells in a dry gas reservoir with water influx. use these data with the volumetric method to calculate the gas reserve and the gas recovery factor if sgr=35% at pa=750psia and the volumetric sweep efficiency is 60%. (35 points)

pi = 2,500 psia.

a=1,000 acres.

zi = 0.860.

swi = 25%.

pa = 750 psia.

h = 10 ft.

za = 0.550

sgr = 35%.

ø=20%

t=180°f

ev=60