Page 67 - Petroleum Production Engineering, A Computer-Assisted Approach

Guo, Boyun / Petroleum Production Engineering, A Computer-Assisted Approach 0750682701_chap04 Final Proof page 58 22.12.2006 6:07pm

4/58 PETROLEUM PRODUCTION ENGINEERING FUNDAMENTALS
of a gas reservoir at a depth of 8,000 ft. At the tubing
Tubing shoe depth: 6,000 ft head, the pressure is 1,000 psia and the temperature is
Tubing inner diameter: 1.995 in. 120 8F; the bottom-hole temperature is 180 8F. The
Oil gravity: 30 8API relative roughness of tubing is about 0.0006. Calculate
Oil viscosity: 2 cp the flowing bottom-hole pressure with three methods:
Production GLR: 500 scf/bbl (a) the average temperature and compressibility factor
Gas-specific gravity: 0.65 air ¼ 1 method; (b) the Cullender–Smith method; and (c) the
Flowing tubing head pressure: 100 psia four-phase flow method. Make comments on your re-
Flowing tubing head temperature: 80 8F sults.
Flowing temperature at tubing shoe: 140 8F 4.6 Solve Problem 4.5 for gas production through a K-55,
Liquid production rate: 1,500 stb/day 17-lb/ft, 5 ⁄ 2 -in casing.
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Water cut: 20% 4.7 Suppose 2 MMscf/d of 0.65 specific gravity gas is
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Interfacial tension: 30 dynes/cm produced through a 2 ⁄ 8 -in. (2.259-in. inside diameter)
Specific gravity of water: 1.05 H 2 O ¼ 1 tubing string set to the top of a gas reservoir at a depth
of 5,000 ft. Tubing head pressure is 300 psia and the
temperature is 100 8F; the bottom-hole temperature is
4.4 For the data given below, calculate and plot pressure 150 8F. The relative roughness of tubing is about
traverse in the tubing string using the Hagedorn– 0.0006. Calculate the flowing bottom pressure with
Brown correlation: the average temperature and compressibility factor
4.5 Suppose 3 MMscf/d of 0.75 specific gravity gas is method.
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produced through a 3 ⁄ 2 -in. tubing string set to the top