Page 151 - Petroleum and Gas Field Processing

Frick, T. C., and Taylor, R. W., Petroleum Production Handbook, Vol. 1:
Mathematics and Production Equipment, 1962, Society of Petroleum
Engineers, Dallas, TX.
Primer of Oil and Gas Production, American Petroleum Institute, Washington, DC,
1976.
Production Facilities, SPE Reprint Series No. 25, 1989, SPE, Richardson, TX.

REVIEW QUESTIONS AND EXERCISE PROBLEMS

1. State whether each of the following statements is True (T) or False (F):

i. The knockout drum is used to separate the bulk of free water and
free gas from the produced stream.
ii. Separation of oil droplets from water is easier and faster than
separation water droplets from oil because the density of oil is
lower than that of water.
iii. In separator design, unless laboratory data are available, the
smallest water droplet size that should be removed from oil is
taken as 100 mm.
2. Circle the correct answers (note that more than one answer could be
correct):
i. In three-phase separators, the produced fluid is separated into the
following:
(a) Gas, oil, and water þ emulsion
(b) Gas oil þ emulsion, and water
(c) Gas, oil, emulsion, and water
ii. The formulation of emulsion in the separators may cause
(a) Improper oil–gas interface level control
(b) Reduction of oil and water effective retention times
(c) Blowby
(d) Plugging of mist extractor
iii. Separation of water droplets from oil compared to separation of
oil droplets from water is

(a) More difficult because oil density is less than that of water
(b) Easier because water viscosity is lower than oil viscosity
(c) More difficult because oil viscosity is higher than water
viscosity
(d) A more important criterion is designing the separator

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