Page 244 - Petroleum Production Engineering, A Computer-Assisted Approach

Guo, Boyun / Computer Assited Petroleum Production Engg 0750682701_chap15 Final Proof page 242 22.12.2006 6:14pm

15/242 PRODUCTION ENHANCEMENT
nosseir, m.a., darwich, t.a., sayyouh, m.h., and sallaly, 15.2 Consider a gas well producing 50 bbl/day of water
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m.e. A new approach for accurate prediction of loading and 0:2ft of sand through a 2.441-in. ID tubing
in gas wells under different flowing conditions. SPE against a wellhead pressure of 600 psia and tempera-
Prod. Facilities November 2000;15(4):245. ture of 80 8F. Suppose the tubing string is set at a
turner, r.g., hubbard, m.g., and dukler, a.e. Analysis depth of 9,000 ft and geothermal gradient is
0.01 8F/ft, estimate the minimum gas production
and prediction of minimum flow rate for the continu- rate before the gas well gets loaded.
ous removal of liquids from gas wells. JPT November 15.3 Consider a gas well producing 80 bbl/day of water
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1969, Trans. AIME 1969;246:1475. and 0:1ft of sand through a 1.995-in. ID tubing
against a wellhead pressure of 400 psia and tempera-
ture of 70 8F. Suppose the tubing string is set at a
Problems depth of 7,000 ft and geothermal gradient is
0.01 8F/ft, estimate the minimum gas production
15.1 Consider a gas well producing 50 bbl/d of condensate rate before the gas well gets loaded.
and 0.1 cubic foot of sand through a 2.441-in. I.D. 15.4 Consider a gas well producing 70 bbl/day of oil and
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tubing against a wellhead pressure of 500 psia. Sup- 0:1ft of sand through a 1.995-in. ID tubing against a
pose the tubing string is set at a depth of 8,000 ft, use wellhead pressure of 600 psia and temperature of
the following data and estimate the minimum gas 80 8F. Suppose the tubing string is set at a depth of
production rate before the gas well gets loaded. 6,000 ft and geothermal gradient is 0.01 8F/ft, esti-
mate the minimum gas production rate before the gas
Gas-specific gravity: 0:75 (air ¼ 1) well gets loaded.
Hole inclination: 0 degrees
Wellhead temperature: 60 8F
Geothermal gradient: 0.01 8F/ft
Condensate gravity: 60 8API
Water-specific gravity: 1:07 (water ¼ 1)
Solid-specific gravity: 2:65 (water ¼ 1)
Oil–gas interface tension: 20 dyne/cm
Tubing wall roughness: 0.000015 in.