Page 112 - Petroleum Production Engineering, A Computer-Assisted Approach

Guo, Boyun / Computer Assited Petroleum Production Engg 0750682701_chap08 Final Proof page 104 20.12.2006 10:36am

8/104 PETROLEUM PRODUCTION ENGINEERING FUNDAMENTALS
Summary
Time (yr) Production Rate (stb/day)
This chapter presents empirical models and procedure for
using the models to perform production decline data ana- 0.1 9.63
lyses. Computer program UcomS.exe can be used for 0.2 9.28
model identification, model parameter determination, 0.3 8.95
and production rate prediction. 0.4 8.64
0.5 8.35
0.6 8.07
References 0.7 7.81
0.8 7.55
arps, j.j. Analysis of decline curves. Trans. AIME 0.9 7.32
1945;160:228–247. 1 7.09
golan, m. and whitson, c.m. Well Performance, pp. 122– 1.1 6.87
125. Upper Saddle River, NJ: International Human 1.2 6.67
Resource Development Corp., 1986. 1.3 6.47
economides, m.j., hill, a.d., and ehlig-economides, c. 1.4 6.28
Petroleum Production Systems, pp. 516–519. Upper 1.5 6.1
Saddle River, NJ: Prentice Hall PTR, 1994. 1.6 5.93
1.7 5.77
1.8 5.61
Problems 1.9 5.46
2 5.32
8.1 For the data given in the following table, identify a 2.1 5.18
suitable decline model, determine model parameters, 2.2 5.05
and project production rate until the end of the tenth 2.3 4.92
year. Predict yearly oil productions: 2.4 4.8
8.2 For the data given in the following table, identify a suit- 2.5 4.68
able decline model, determine model parameters, predict 2.6 4.57
the time when the production rate will decline to a mar- 2.7 4.46
ginal value of 500 stb/day, and the reverses to be recov- 2.8 4.35
ered before the marginal production rate is reached: 2.9 4.25
3 4.15
3.1 4.06
3.2 3.97
Production Rate 3.3 3.88
Time (yr) (1,000 stb/day) 3.4 3.8
0.1 9.63
0.2 9.29 8.3 For the data given in the following table, identify a suit-
0.3 8.98 able decline model, determine model parameters, predict
0.4 8.68 the time when the production rate will decline to a
0.5 8.4 marginal value of 50 Mscf/day, and the reverses to be
0.6 8.14 recovered before the marginal production rate is reached:
0.7 7.9
0.8 7.67 Production Rate
0.9 7.45 Time (mo) (Mscf/day)
1 7.25
1.1 7.05 1 904.84
1.2 6.87 2 818.73
1.3 6.69 3 740.82
1.4 6.53 4 670.32
1.5 6.37 5 606.53
1.6 6.22 6 548.81
1.7 6.08 7 496.59
1.8 5.94 8 449.33
1.9 5.81 9 406.57
2 5.68 10 367.88
2.1 5.56 11 332.87
2.2 5.45 12 301.19
2.3 5.34 13 272.53
2.4 5.23 14 246.6
2.5 5.13 15 223.13
2.6 5.03 16 201.9
2.7 4.94 17 182.68
2.8 4.84 18 165.3
2.9 4.76 19 149.57
3 4.67 20 135.34
3.1 4.59 21 122.46
3.2 4.51 22 110.8
3.3 4.44 23 100.26
3.4 4.36 24 90.72