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PGE 362
Production Engineering
HWK 2  Solution
This assignment is due at lecture time on Friday, Sept. 21, 2008.
Please demonstrate the effect on flow rate for the conditions given by changing the input
line diameter.
(1) Fluid: Injection water
Fluid gravity: 1.0
Fluid viscosity: 1.0 cp
Choke Size: 32/64”
Up stream (pump) pressure: 525 psi
Down stream (well head) pressure: 500 psi
This problem must be solved by successive substitution as shown in example 108.
(a)
(+2.0)
Input flow line diameter = 1.00”
For the D2/D1 ratio of
0.5 use the invariant part of Figure 1011 to estimate
C=1.025.
With this value of C, compute the first estimate of q = 3,698 bbl/day.
Now compute the Reynolds Number using the first estimate for q.
Nre = 683,035.
Using this Reynolds Number the new value for C = 1.025.
Since the value for C has not changed the value of flow rate will not change.
So, q = 3,698 bbl/day using a 1” input line to a 32/64
”
choke.
(b)
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 Spring '08
 Bommer

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