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In some specific cases equation
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can be explicitly integrated with the accuracy sufficient for practical applications: | Low pressure dry gas |
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body | \{ \phi_e = {\rm const}, \ c_t = {\rm const} \} |
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body | c_t = c_r + \frac{1}{p} \sim \frac{1}{p} |
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| p(t) = p_i + \frac{\Delta Q(t)}{V_e \cdot c_t} |
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| p(t) = p_i \exp \left[ \frac{\Delta Q(t)}{V_e} \right] |
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The above approximations sometime allow using simple graphical methods for rough estimation of drainage volume
and associated
Hydrocarbon Reserves.
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