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The major difference between cumulative offtakesproduction and cumulative production is offtakes is that cumulative offtakes accounts 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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Petroleum Industry / Upstream / Production / Subsurface Production / Field Study & Modelling / Production Analysis
Cumulative Offtakes, Cumulative Intakes, Cumulative VRR