Page 123 - PVT Property Correlations

Gas Condensates Chapter | 5 101

Then
ln P d Þ 5 18:6012
ð

3486 3 0:786
2 0:1520 ln 2 0:1674 ln 323Þ 1 0:0685 3 0:786
ð
0:782
2 0:0559
1 2 0:0559 3 e 8:496120:7466 ln 3486Þ
ð
0:7823
ln P d Þ 5 8:287613588
ð
P d 5 3974:3 psia
Calculating the dew point using gas composition by Elsharkawy (2001):

P d 5 A 0 1 A 1 Tf 1 A 2 xH 2 S 1 A 3 xCO 2
1 A 4 xN 2 1 A 5 xC 1 1 A 6 xC 2 1 A 7 xC 3 1 A 8 xC 4 1 A 9 xC 5 1 A 10 xC 6
1 A 11 xC 7 1 A 12 MW C71 1 A 13 γ C71 1 A 14 xC 71 MW c71 Þ
ð

MW c71 xC 71 MW c71 xC 71
γ C71 γ C71 xC 1 1 xC 2
1 A 15 1 A 16 1 A 17

xC 71
1 A 18
xC 2 1 xC 3 1 xC 4 1 C 5 1 C 6
ð5:6Þ
where the correlation parameters are given in Table 5.10.
Table 5.11 summarizes the results of calculating each term of Elsharkawy’s
(2001) equation, while the dew point pressure is calculated to be:
P d 5 3473 psia

TABLE 5.10 Dew Point Correlation Constants (Elsharkawy, 2001)
A0 A1 A2 A3 A4 A5
4268.85 0.09 2 7157.87 2 4540.58 2 4663.55 2 1357.56
A6 A7 A8 A9 A10 A11
2 7776.10 2 9967.99 2 4257.10 2 1417.10 691.53 40,660.36
A12 A13 A14 A15 A16 A17
205.26 2 7260.32 2 352.41 2 114.52 8.13 94.92
A18
238.25