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[[File:Vol4 page 0242 eq 002.png|RTENOTITLE]]....................(2) | [[File:Vol4 page 0242 eq 002.png|RTENOTITLE]]....................(2) | ||
'''Fig. | '''Fig. 4''' shows how flow restrictions in the near-wellbore region can increase the pressure gradient, resulting in an additional pressure drop caused by formation damage (Δ''p''<sub>skin</sub>). | ||
<gallery | <gallery> | ||
File:Vol4 Page 242 Image 0001.png|'''Fig. | File:Vol4 Page 242 Image 0001.png|'''Fig. 4—Pressure profile in the near-wellbore region for a well with formation damage.'''<ref name="r2" /> | ||
</gallery> | </gallery> | ||
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[[File:Vol4 page 0243 eq 001.png|RTENOTITLE]]....................(5) | [[File:Vol4 page 0243 eq 001.png|RTENOTITLE]]....................(5) | ||
When ''x'' = 0, a linear IPR model is recovered; when ''x'' = 0.8, we obtain Vogel's IPR; and when ''x'' = 1, Fetkovich's IPR model is obtained. An example of a plot for the dimensionless hydrocarbon production as a function of the dimensionless bottomhole pressure (IPR) is shown in '''Fig. | When ''x'' = 0, a linear IPR model is recovered; when ''x'' = 0.8, we obtain Vogel's IPR; and when ''x'' = 1, Fetkovich's IPR model is obtained. An example of a plot for the dimensionless hydrocarbon production as a function of the dimensionless bottomhole pressure (IPR) is shown in '''Fig. 5''' for different flow efficiencies. It is evident that, as flow efficiency decreases, smaller and smaller hydrocarbon rates are obtained for the same drawdown [[File:Vol4 page 0243 inline 001.png|RTENOTITLE]]. | ||
<gallery | <gallery> | ||
File:Vol4 Page 243 Image 0001.png|'''Fig. | File:Vol4 Page 243 Image 0001.png|'''Fig. 5—Inflow performance relations for different flow efficiencies(F).'''<ref name="r3" /> | ||
</gallery> | </gallery> | ||
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