Environmental Engineering Reference
In-Depth Information
Table 3.1
Composition of natural gases
Field
Hugoton
Austin
Leduc Gas
Cap D-3
Viking,
Kinsella
West
Cameron,
Blk 149
State
Oklahoma,
Texa
s
Michigan
Alberta
Alberta
Louisiana
(Gulf)
Formation
Permian
Dolomite
Stray Sand
Devonian
Cretaceous
Sand
Miocene
Sand
Depth (ft)
3,00
0
1,200
5,000
-
7,150
Mole percentage
Nitrogen, N
2
15.5
7.3
7.41
0.24
-
Carbon dioxide, CO
2
-
-
0.72
2.26
0.3
Helium, He
0.58
0.4
-
Methane, CH
4
71.5
1
79.74
72.88
88.76
96.95
Ethane, C
2
H
6
7
9.1
9.97
4.76
2.05
Propane, C
3
H
8
4.4
2.8
5.09
2.67
0.47
Isobutane, C
4
H
10
0.29
0.1
0.72
0.42
0.08
n
-Butane, C
4
H
10
0.7
0.4
1.76
0.21
0.09
Isopentane, C
5
H
12
0.02
}
0.1
0.99
0.38
{
0.03
n
-Pentane, C
5
H
12
-
0.02
Hexane, C
6
H
14
-
0.05
0.46
0.3
0.31
Heptane+ - 0.01
100 100 100 100 100
Note
: Reprinted with permission, from Donald Katz et al.:
Handbook of Natural Gas Engineering
(New York: McGraw-Hill, 1959)
Composition of Natural Oils and Gases
The exact behavior of any particular reservoir is thus a function of the components
of the hydrocarbon mixture placed there by nature and, to a small extent, of the way
in which the multicomponent system is produced. By varying the temperature and
pressure at various separator stages it is sometimes possible to increase slightly the
liquid (oil) recovery. The range of hydrocarbon types commonly found is given in
Tables
3.1
and
3.2
.
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