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The major difference between cumulative offtakesproduction and cumulative production is offtakes is that cumulative offtakes recalculates produced surface volumes to sandface conditions and accounts for the shrinkage factors and cross-phase exchange coefficients which depend dependence on formation pressure
and
formation temperature and which may vary over time:
Cumulative | offtakesproduction (no reference to the fluid) | Cumulative productionofftakes (no reference to the fluid) |
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| {\rm off} | B(p(\tau), T(\tau)) | | LaTeX Math Inline |
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| body | Q^{\uparrow}_p {\rm off} = \int_0^t B(p_e(\tau), T_e(\tau)) q^{\uparrow}(\tau) d\tau |
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See Also
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