Environmental Engineering Reference
In-Depth Information
Table 3.2
Analysis of reservoir oils containing dissolved gases
Oklahoma
City, Wilcox
Schuler
(Jones Sand)
Field
Leduc D-2
Leduc D-3
Paloma
Rodessa
Keokuk
State or Province
Alberta
Alberta
California
Oklahoma
Louisiana
Oklahoma
Arkansas
Reservoir
Depth (ft)
5,000
5,300
10,600
6,200
5,950
4,026
7,600
Pressure (psia)
1,774
1,908
4,663
2,630
2,600
1,455
3,520
Temperature (°F)
149
153
255
132
192
130
198
Mole percentage
Nitrogen, N
2
-
-
-
-
-
-
1
Carbon dioxide, CO
2
-
-
-
-
-
-
0.8
Methane, CH
4
28.6
30.3
55.8
37.7
40.88
25.6
42.85
Ethane, C
2
H
6
10.9
13.1
5.81
8.7
4.53
8.88
6.6
Propane, C
3
H
8
9.4
9.4
6.42
6.3
2.6
12.41
4.1
Isobutane, C
4
H
10
2.5
1.8
1.31
1.4
1.25
1.93
}
3.64
n
-Butane, C
4
H
10
4.4
4.9
3.97
3
1.82
7.56
Pentane, C
5
H
12
Hexane, C
6
H
14
4.8
4.5
3.67
3.3
3.48
5.53
3.1
Heptane+
39.4
36
2.61
39.6
4.43
}
38.09
{
3.83
-
-
20.41
-
41.01
34.08
100
100
100
100
100
100
100
Molecular weight
Heptanes+
201
193
237
225
220
195
243
Specific gravity as
Liquid heptanes+ 0.840 0.840 0.891 0.840 0.824 0.839 0.876
Note
: Reprinted with permission, from Donald Katz et al.:
Handbook of Natural Gas Engineering
(New York: McGraw-Hill, 1959)
Water
Formation Volume Factor
. The properties of water are determined by the amount
of salt dissolved in it and by pressure and temperature. Figure
3.9
relates these three
variables. Note that increasing temperature tends to expand a given volume of water,
whereas increasing pressure tends to contract it. Thus, values of
B
w
tend to be close
to 1.0.
B
w
can be expressed in a number of equivalent forms, e.g.,
BVV
Bqq
B
=
=
=
/
/
rr
w
wwf
wsc
or
w
wwf
wsc
w
wsc
wwf
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