first Flashcards
(170 cards)
1
Q
What is net sand thickness
A
2
Q
Discribe the linearity of the closed reservoir of arbitrary geometry PSSF equation
A
3
Q
what is the log log method for a gas well build up test
A
4
Q
what is “L” when calcualting two point derivative
A
5
Q
Describe sandface rate when production goes to 0 or increases fast
A
6
Q
What is the equation for wellbore storage coeffcient
A
7
Q
what is the gas flow equation and how does it compare to the oil flow equation
A
8
Q
Any increase in flow capacity (kh) will cause the pressure derivative to deviate ____ from IARF profile
A
9
Q
in a Gringarten-Bourdet Type Curve, well bore storage is has a _____ slove
A
10
Q
What is the simulation / history matching process
A
11
Q
A ____ boundary (no-flow or constant-pressure) can be appropriate ONLY if the well is MUCH closer to ONE BOUNDARY than to any other
A
12
Q
What is a core analysis test in terms of alternate tests
A
13
Q
What is the productivity index
A
14
Q
When does IARF end and PSSF start for a Well In The Center Of A Closed Circular Reservoir
A
15
Q
what is a linear constant pressure boundary
A
16
Q
what is the manual log log analysis method for gas reservoir build up test
A
17
Q
how does the use of adjusted pressure and adjusted time modify the diagnositic plot
A
18
Q
What is the recommended procedure for drawdown semilog analysis with varying rates
A
19
Q
What is the Horner Pseudoproducing Time Approximation
A
20
Q
what is the procedure to do a gas well build up test semilog analysis
A
21
Q
how do you determine the skin effect while using a Gringarten Type Curve
A
22
Q
What is the equation for infinite acting radial flow
A
23
Q
What is the Horner method
A
24
Q
what is the symbol for real gas pseudopressure
A
25
Name an anomaly during Final Flowing Wellbore Pressure
26
27
What is the Equivalent-Time Method procedure for build up test analysis
28
What is the viscosity versus pressure graph for gas
29
when do you use p versus p2 during gas drawdown test
in between 2000 and 3000, there is no approximation, you need to calculate
30
What is the equation for steady state radial flow
31
What is PSS
32
The top equation is for \_\_\_\_\_\_\_\_
and the bottom equation is for \_\_\_\_\_\_\_
top = well bore storage
bottom = reservoir
33
34
in a Gringarten-Bourdet Type Curve, IARF has a _____ slope
35
what is the Ei function with dimensions
typed, arrow point
36
What is the wellbore flow equation for PSSF for a closed circular reservoir?
37
38
39
What is the recommended procedure for Reservoir Limits Test Analysis
40
Describe linear no-flow boundary
41
42
what is adjusted time
43
Radius of investigation is a function of what
44
what is TD
Dimensionless time
45
What is the Agarwal Equivalent-Time Method
46
47
Describe Circular Constant-Pressure Boundary
48
What is the formation volume factor versus pressure graph for gas
49
A Gringarten Type Curve has a ____ log-log plot
50
What is the viscosity versus pressure graph for water
51
The derivative for the IARF period all approach what?
1/2
52
Solution for \_\_\_\_Boundary condition can be solved using the method of image wells
53
54
What is the formation volume factor versus pressure graph for oil
55
What is total compressibility
56
What does PSSF begin
57
What is the MDH method
58
what is the symbol for adjusted pressure
pa
59
What is a drawdown test
60
Gas wells often exhibit rate dependent or ____ skin factor
61
What is an exploration well test
62
what is IARF
infinite acting radial flow
63
What is the principal of superposition in time
64
What is pore volume compressibility
65
\_\_\_\_\_\_\_\_ are solutions to the diffusivity equation in dimensionless form displayed graphically.
66
what is the log log drawdown test procedure for a gas reservoir
67
What is the equation for fluid compressibility
68
ka \> ko means the reservoir is what?
69
In a constant-rate drawdown test, the well is initially shut in, and the reservoir is at _______ pressure
70
The wellbore storage coefficient depends on what?
71
What are the assumptions for the Dietz & Ramey-Cobb Methods
72
73
What is a deliverability test
74
what are some observations of this data
75
What is the radius of investigation
76
what are the assumptions for a Gringarten-Bourdet Type Curve
77
In PDD, a unit-slope line in derivative suggests the presence of a \_\_\_\_\_reservoir, while in PBU, it happens only if the reservoir is not \_\_\_\_
78
What is a transient test
79
80
What is the Diffusivity equation for radial flow
81
ka \< ko means the reservoir is what?
82
what are the types of well model for type curves
83
Any reduction in flow capacity will cause the pressure derivative to deviate ____ from IARF profile
84
Descripe pressure response for linear no flow boundary
85
what are the two steps to use Buildup Test Analysis using Drawdown Type Curves:
86
what are the types of inner boundary conditions for type curve models
87
What is a build up test
88
What is type curve matching in terms of interpretation methods
89
when matching up type curves during a drawdown test, ___ and ___ are calculated after matching up the x and y axis
k, CD --\> C, and S
90
The Gringarten-Bourdet Type Curve is a type of _______ plot
diagnostic plot
91
During pseudosteady-state flow from a closed reservoir, Pa and ta , may be used to predict gas-well behavior, provided the adjusted time is evaluated using fluid properties at _____ pressure as a function of time
92
What is formation volume factor?
93
Average reservoir pressure can be calculated using conventional material balance, p/z vs Gp , if the reservoir ______ and _____ are known.
94
What is the inverse problem
95
what is the two point method to calcualte derivative
96
What is the forward problem
97
describe closed circular reservoir
98
what is the semi-log drawdown test procedure for a gas reservoir
99
100
• If the pressure changes during drawdown in less than 10% of the initial pressure, the ____ equation may be used with acceptable results.
101
What is the MBH Procedure for estimating Average Drainage-Area Pressure
102
How do you factor in varying rate during a drawdown test
103
What is the equation for steady state linear flow
104
what is psuedotime
105
The a larger difference between the Gringarten and Bourdet Type Curve indicates what?
_more skin_
106
What is a single well test
107
What is the wellbore pressure equation
108
what two things need replaced when using oil equations during gas drawdown tests
109
110
What is wireline formation testing in terms of alternate tests
111
112
How can we estimate three independent quantities (k, s, pi ) from a straight line on the Horner plot?
113
What is a log-derived permeability estimate in terms of alternate tests
114
What are some additional pressure drop equations due to permeability alteration
115
show the Gringarten-Bourdet type curve for damaged, undamaged, and stimulated wells
116
What is the formation volume factor versus pressure graph for water
117
What is the Ei function without dimensions
hand written
118
What is the straight line method in terms of interpretation methods
119
What is a rate transient test in terms of alternate tests
120
In practice, what is the best workflow for well test interpretation
121
During gas build-up tests, don’t forget to replace pressure and time with the \_\_\_\_\_pressure and adjusted time, respectively, and the oil properties with gas properties evaluated at \_\_\_\_\_\_\_
122
what are the types of outer boundary conditions for type curve models
123
The best fit of a type curve can be used to calculate \_\_\_\_, \_\_\_\_, \_\_\_\_\_\_, \_\_\_\_\_, or other reservoir properties
124
For Gringarten Type Curve, CDe2s reflects effects of ____ and \_\_\_\_
wellbore storage and skin
125
What is well test interpretation
126
what is the bourdet three point method
127
What is the principal of superposition in terms of a buildup test
128
what is a Gringarten-Bourdet type curve
129
\_\_\_\_\_\_ means the pressure gradients in the reservoir are small enough – reservoir pressure may be treated as uniform throughout the reservoir
130
how do you do a manual log log analysis
131
What is the completion efficiency ratio
132
What is the effect of flow rate on the radius of investigation
133
134
what is the manual log log analysis for a gas reservoir
135
136
The pseudopressure and the adjusted pressure depend only on:
137
138
When does IARF end?
139
What is the Diffusivity equation for 1D linear flow
140
141
What is a development well test
142
What is the Dietz method procedure
143
What is the Horner method
144
what are the types of reservoir media for type curve models
145
What does the MBH pressure function graph look like for a 2x1 square
146
what is the adjusted pressure equation used during a gas well build up test semilog analysis
147
What is the equation for a closed reservoir of arbitrary geometry under PSSF?
148
149
What are the simplist boundary models
150
What is a multi well test
151
what is the equation for adjusted pressure
152
What is the principal of superposition in space
153
The Bourdet derivative is a _____ derivative
logarithmic
154
155
What is the MBH method?
156
157
• Many physical reservoir boundaries give similar ____ response and requires additional data to confirm the boundary type
158
What is the viscosity versus pressure graph for oil
159
Use Gringarten-Bourdet type curve for build up test if:
160
161
Describe pressure response for linear constant pressure boundary
162
what is the least square curve fitting method
163
164
What is a permanent monitoring test in terms of alternate tests
165
166
What is the pressure profile equation for a drawdown test
167
what are the 3 types of reservoir boundaries
168
What is Darcy's law
169
what is CD
dimensionless wellbore storage
170
How do you linearize a drawdown test graph and what equatiosn results
