mwaof mwaof uses standard back pressure test results and flow rates of gas plus liquids from...
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Multi-Well AOFAnalysis for Windows
Multi-Well AOFAnalysis for Windows
SiriusPetroleum Software
SiriusPetroleum Software
MWaof
Mwaof uses standard back pressure test results and flow rates of gas plus liquids from individual
wells and performs and Absolute Open Flow (AOF) analysis using four different analysis
approaches. The program allow easy determination of AOF potential from different
deliverability tests using graphical and numerical analysis. Analysis are summarised and sandface
IPR is generated.
MWaof, Sirius Petroleum Software 3
MWaofAgenda
• Well data
• Pool data
• Gas analysis data
• Special Features, System Options, Methods and Correlations
• Output Reports and Graphs
• Demo
• Questions
MWaof, Sirius Petroleum Software 4
Well Data
• Wells are defined with a pool, group and a lease.
• Basic Data: Well name, UWI, group and lease.
• Deliverability Test Data: Type of test, start/end date, produced through, produced to options.
MWaof, Sirius Petroleum Software 5
Well Data
MWaof, Sirius Petroleum Software 6
Deliverability Test Data
MWaof, Sirius Petroleum Software 7
Analysis Options
MWaof, Sirius Petroleum Software 8
Analysis Results
MWaof, Sirius Petroleum Software 9
Pool Data
• Basic Data: Pool name, Field name, and gas analysis name.
• Reservoir Data: Current pressure, formation temperature, and abandonment pressure.
MWaof, Sirius Petroleum Software 10
Pool Data
MWaof, Sirius Petroleum Software 11
Gas Analysis Data
• Full Gas Analysis: 12 Component gas analysis including N2, CO2 and H2S, C7
+ properties (Molecular Weight, Specific Gravity)
• Simple Gas Analysis: 3 non-HC including N2, CO2, and H2S, and a total gas specific gravity.
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Gas Analysis
MWaof, Sirius Petroleum Software 13
Gas AnalysisERCB Example Gas A-1Detailed Gas Analysis
Mo
le
fra
ctio
n
Components
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0.95
1.00
N2 C02 H2S C1 C2 C3 iC4 nC4 iC5 nC5 C6 C7+
MWaof, Sirius Petroleum Software 14
MwaofSpecial Features
• Data Selection
– Fluid options: gas only, or total fluid (gas+liquid)
– Data selection: all points, or all selected points
• Tests
– Single point
– Conventional (four stabilised rates)
– Isochronal (four transient rates, stabilized pressures)
– Modified Isochronal (four transient rates, one stabilised rate)
• Analysis Methods
– Simplified (Rawlings and Schellhardt, 1936)
– LIT-Pressure
– LIT-Pressure Squared (Houpert, 1959)
– LIT-Pseudo Pressure (Al-Hussainy, 1965)
MWaof, Sirius Petroleum Software 15
System Options
MWaof, Sirius Petroleum Software 16
Correlations
MWaof, Sirius Petroleum Software 17
Output, Reports and Graphs
• Diagram of results
• Numerous reports– well, pool, group, lease, company, etc.
• Numerous graphs– well, pool, group, lease, company, etc.
MWaof, Sirius Petroleum Software 18
Diagram
MWaof, Sirius Petroleum Software 19
Reports
MWaof, Sirius Petroleum Software 20
Graphs
MWaof, Sirius Petroleum Software 21
Recombination AnalysisERCB Example Gas A-1Detailed Gas Analysis
Mo
le f
rac
tio
n
Components
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0.95
1.00
N2 C02 H2S C1 C2 C3 iC4 nC4 iC5 nC5 C6 C7+
MWaof, Sirius Petroleum Software 22
Flow PeriodsExample Well Name
Well Flow Periods versus Time
Ga
s F
low
Ra
te (
se
³m³/
d)
Time (hr)
0.0
50.0
100.0
150.0
200.0
250.0
300.0
0
50
10
0
15
0
20
0
25
0
30
0
35
0
40
0
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Linear ScaleExample Well Name
Simplified AOF Analysis - Linear Scale
UsedTransient
not-UsedTransient
UsedStabilized
not-UsedStabilized
Lo
g (
De
lta
P²)
Log (Fluid Flow Rate (se³m³/d))
7.30
7.35
7.40
7.45
7.50
7.55
7.60
7.65
7.70
7.75
7.80
7.85
7.90
7.95
8.00
8.05
8.10
8.15
8.20
8.25
8.30
2.0
0
2.0
5
2.1
0
2.1
5
2.2
0
2.2
5
2.3
0
2.3
5
2.4
0
2.4
5
2.5
0
2.5
5
2.6
0
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Log ScaleExample Well Name
Simplified AOF Analysis - Log Scale
UsedTransient
not-UsedTransient
UsedTransient
not-UsedStabilized
De
lta
P S
qu
are
d
Fluid Flow Rate (se³m³/d)
1.0e+06
1.0e+09
1.0e+07
1.0e+08
10
.0
10
00
.0
10
0.0
MWaof, Sirius Petroleum Software 25
Inflow PerformanceExample Well Name
Well IPR - Simplified (Rawlins and SchellHardt, 1936)
Sa
nd
fac
e P
res
su
re (
kP
aa
)
Fluid Flow Rate (se³m³/d)
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
13000
14000
15000
0.0
50
.0
10
0.0
15
0.0
20
0.0
25
0.0
30
0.0
35
0.0
40
0.0
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