## Transcribed Text

The first four questions refer to the following two plots:
Test 6: Flow Test - Semilog Plot of Drawdown
3,400
3,300
3,200
3,100
3,000
2,900
2,800
2,700
0.01
0.1
1
10
100
1000
t, hrs
Test 6 Flow Test - Cartesian Plot of Raw Data
3,400
3,350
3,300
3,250
3,200
3,150
3,100
3,050
3,000
2,950
2,900
2,850
2,800
2,750
2,700
20
40
60
80
100
120
140
160
180
t, hrs
1. At what time did the flow go from infinite acting to pseudo steady state?
2.
Given the additional data below, for a well in the center of a large, mostly homogenous
reservoir, what is k and s?
q =
75 STB/D
pi =
3394.81
psia
h =
11
ft
o =
0.099
I'w =
0.48
ft
Bo =
1.303
bbl/STB
Ct =
1.44E-5
psi¹
o =
1.324
cp
3.
What additional parameters can you determine from this test?
a. none
b. initial pressure
c.
drainage area radius
d.
average pressure
4. Determine the parameter or parameters you selected in the previous question.
The next three questions refer to the following plot
Test 8 Semilog Buildup
9,000
8,500
8,000
67,500
7,000
6,500
6,000
1
10
100
1,000
10,000
(tp+At)/At, hrs
5. With the following additional data, find k and S
qo =
225
BOPD
tp =
144
hr
pwf =
6,399.7
psia
h =
5
ft
o =
0.079
rw =
0.33
ft
Bo =
1.261
bbl/STB
8.45E-
Ct =
06
psi-1
o =
2.43 cp
6. Find p*
7. Considering the graph can you use p* as an estimate for pi? Why or why not?
The next two questions refer to the following plot
100
Ap=262 = psi
Coess7710°
pd = 10
1,000
Match
point
p
PD
1
t
=0.0546
1,000
eq
teg
0.01 tD/C/= 1
100,000
tp/Cp
8. Considering the match, and without doing any calculations, do you think the skin factor would
be positive, negative or zero?
9. Using the matched type curve below, find k and S for the well test, given the following additional
information.
q=
150
STB/D
pi =
3394.81
psia
h =
20
ft
d =
0.15
rw =
0.33
ft
B. =
1.15
bbl/STB
Ct =
1.25E-5
psi-1
=
1.4
cp

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