Environmental Engineering Reference
In-Depth Information
Fig. 3.19
Oil formation volume factor at
P
b
, Courtesy Schlumberger
Question #3.11
B
ob
and
q
owf
Given: ʳ
g
= 0.8,
R
sb
= 1,500 cf/B,
T
= 200 °F
a. Find
B
ob
=
_______
b. If
q
osc
= 1,000 BOPD,
ind
q
owf
= ________BOPD
The nomogram in Fig.
3.19
holds only for conditions at bubble-point pressure. At
well flowing pressures above and below the bubble-point, it is necessary to apply the
following algorithms: (1) for undersaturated oils (above bubble-point pressure),
(
)
ë
1
where
C
o
is the oil compressibility, a function of ˁ
ob
; and (2) for saturated oils (below
bubble-point pressure),
BB Cp p
o
=
-
-
ob
o
wf
b
(
)
B
=+ -
1
k B
1
o
ob
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