Question

The following information is available on a volumetric gas reservoir: Initial reservoir temperature, $T_{\mathrm{i}}=155^{\circ} \mathrm{F}$ Initial reservoir pressure, $p_i=3500$ psia Specific gravity of gas, $\gamma_g=0.65$ (air $=1$ ) Thickness of reservoir, $h=20 \mathrm{ft}$ Porosity of the reservoir, $\phi=10 \%$ Initial water saturation, $S_{\mathrm{wi}}=25 \%$ After producing 300 MMscf , the reservoir pressure declined to 2500 psia. Estimate the areal extent of this reservoir.

   The following information is available on a volumetric gas reservoir:

Initial reservoir temperature, $T_{\mathrm{i}}=155^{\circ} \mathrm{F}$
Initial reservoir pressure, $p_i=3500$ psia
Specific gravity of gas, $\gamma_g=0.65$ (air $=1$ )
Thickness of reservoir, $h=20 \mathrm{ft}$
Porosity of the reservoir, $\phi=10 \%$
Initial water saturation, $S_{\mathrm{wi}}=25 \%$
After producing 300 MMscf , the reservoir pressure declined to 2500 psia. Estimate the areal extent of this reservoir.

Advanced Reservoir Engineering

Tarek Ahmed PhD PE,… 1st Edition

Chapter 3, Problem 1

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Step 1

To convert from Fahrenheit to Rankine, use the formula: \[ T_{\mathrm{i}}(R) = T_{\mathrm{i}}(F) + 459.67 \] \[ T_{\mathrm{i}}(R) = 155 + 459.67 = 614.67 \, R \] Show more…

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The following information is available on a volumetric gas reservoir: Initial reservoir temperature, $T_{\mathrm{i}}=155^{\circ} \mathrm{F}$ Initial reservoir pressure, $p_i=3500$ psia Specific gravity of gas, $\gamma_g=0.65$ (air $=1$ ) Thickness of reservoir, $h=20 \mathrm{ft}$ Porosity of the reservoir, $\phi=10 \%$ Initial water saturation, $S_{\mathrm{wi}}=25 \%$ After producing 300 MMscf , the reservoir pressure declined to 2500 psia. Estimate the areal extent of this reservoir.

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