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Excerpt Include
Aquifer Drive
Aquifer Drive
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Inputs & Outputs

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water influx from aquifer at time moment

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bodyt

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InputsOutputs

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bodyp(t)

field-average formation pressure at time moment

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bodyt

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bodyQ^{\downarrow}_{AQ}(t)

Cumulative subsurface water influx from aquifer

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bodyp_i

initial formation pressure

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bodyq^{\downarrow}_{AQ}(t) = \frac{dQ^{\downarrow}_{AQ}}{dt}

Subsurface water flowrate from aquifer

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bodyJ_{AQ}

aquifer Productivity Index





LaTeX Math Inline
body\sigma

aquifertransmissibility

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body

Q_{AQ}(t)

\displaystyle \tau = \frac{V_{AQ} \, c_t}{J}

aquifer relaxation time
Detailing Inputs

LaTeX Math Inline
bodyV_{AQ}

aquifer volume

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bodyA_{AQ}

aquifer area

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bodyA_e

pay area


Assumptions

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Pseudo Steady State Flow

Oil field performs as single well with 

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bodyA_e
 cross-sectional area in 

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bodyp_{AQ}(t)=p_i = \rm const

Aquifer pressure is constant

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bodyJ_{AQ} = \rm const

Aquifer Productivity Index is constant

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