A cylindrical crude oil reservoir with a radius of 3000 ft is under water influx from a cylindrical aquifer with an estimated radius of 9000 ft. The reservoir has the following properties.
\(\text{Aquifer thickness, } h = 40 \, \text{ft}, \text{ Porosity, } \phi = 15%, \)
\(\text{Formation compressibility, } C_f = 4.5 \times 10^{-6} \, \text{psi}^{-1}, \text{ Water compressibility, } C_w = 4.0 \times 10^{-6} \, {psi}^{-1}.\)
Assuming a pot reservoir model with fractional encroachment angle as unity, the water influx into the reservoir for a pressure drop of 700 psi is \(\underline{\hspace{2cm}}\) MMbbl (million barrels) (round off to two decimal places).
A cylindrical crude oil reservoir with a radius of 3000 ft is under water influx from a cylindrical aquifer with an estimated radius of 9000 ft. The reservoir has the following properties.
\(\text{Aquifer thickness, } h = 40 \, \text{ft}, \text{ Porosity, } \phi = 15%, \)
\(\text{Formation compressibility, } C_f = 4.5 \times 10^{-6} \, \text{psi}^{-1}, \text{ Water compressibility, } C_w = 4.0 \times 10^{-6} \, {psi}^{-1}.\)
Assuming a pot reservoir model with fractional encroachment angle as unity, the water influx into the reservoir for a pressure drop of 700 psi is \(\underline{\hspace{2cm}}\) MMbbl (million barrels) (round off to two decimal places).
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Correct Answer: 1.36
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