Q2: Q3:A volumetric dry gas reservoir has an initial pressure 2000 psia and constant temperature of 120 ºF the reservoir pressure drop to 1125 psia After half of the moles of the gas of reservoir are produced .the gas compressibility factor was 0.8 at 2000 psia .what is the gas compressibility factor at 1000 psi? estimate the coefficient of gas isothermal compressibility in 1125 psia?

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