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Despite of terminological similarity there is a big difference in the way Dynamic Modelling (DM), Well Flow Performance (WFP) and Well Testing define (WT) usually define formation pressure and productivity index. This difference is The most typical definitions (although they do not cover the full variety of definitions referred in petroleum literature) are summarised in the table below:
Field-average formation pressure estimate
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Sometimes the wrong estimations of flowrate stem form the wrong inputs (
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and sometimes liquid productivity index:
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Boundary-average formation pressure estimate
along the boundary of drainage area Ae
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p_e = \frac{1}{L_e} \int_0^{L_e} p(x,y,z) dl |
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Total sandface productivity index:
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See Also
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Petroleum Industry / Upstream / Production / Subsurface Production / Well & Reservoir Management
Subsurface E&P Disciplines / Production Technology / Productivity Index