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Guo, Boyun / Computer Assited Petroleum Production Engg 0750682701_chap15 Final Proof page 233 22.12.2006 6:14pm

WELL PROBLEM IDENTIFICATION 15/233

Figure 15.6 Square-root time plot for pseudo-linear flow analysis.

Figure 15.7 Semi-log plot for horizontal pseudo-radial flow analysis.

models to describe the liquid-loading problem: the film- to the critical Weber number of 30. Turner et al.’s terminal
movement model and the entrained drop movement slip velocity equation is expressed in U.S. field units as
model. On the basis of analyses on field data, they con- 1=4
cluded that the film-movement model does not represent 1:3s 1=4 r L r g
the controlling liquid transport mechanism. v sl ¼ 1=4 1=2 : (15:23)
C
Turner et al.’s entrained drop movement model was de- d r g
rived on the basis of the terminal free settling velocity of According to Turner et al., gas will continuously remove
liquid drops and the maximum drop diameter corresponding liquids from the well until its velocity drops to below the