Transcript MWaof Presentation

Multi-Well AOF
Analysis for Windows
Sirius
Petroleum 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
Agenda
•
•
•
•
Well data
Pool data
Gas analysis data
Special Features, System Options, Methods and
Correlations
• Output Reports and Graphs
• Demo
• Questions
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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.
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Well Data
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Deliverability Test Data
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Analysis Options
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Analysis Results
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Pool Data
• Basic Data: Pool name, Field name, and
gas analysis name.
• Reservoir Data: Current pressure,
formation temperature, and abandonment
pressure.
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Pool Data
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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
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Gas Analysis
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Mwaof
Special 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)
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System Options
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Correlations
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Output, Reports and Graphs
• Diagram of results
• Numerous reports
– well, pool, group, lease, company, etc.
• Numerous graphs
– well, pool, group, lease, company, etc.
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Diagram
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Reports
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Graphs
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Recombination Analysis
ERCB Example Gas A-1
Detailed Gas Analysis
1.00
0.95
0.90
0.85
0.80
0.75
0.70
Mole fraction
0.65
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
N2
C02
H2S
C1
C2
C3
iC4
nC4
iC5
nC5
C6
C7+
Components
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Flow Periods
Example Well Name
Well Flow Periods versus Time
300.0
200.0
150.0
100.0
50.0
400
350
300
250
200
150
100
50
0.0
0
Gas Flow Rate (se³m³/d)
250.0
Time (hr)
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Linear Scale
Example Well Name
Simplified AOF Analysis - Linear Scale
8.30
8.25
8.20
8.15
8.10
8.05
8.00
7.90
7.85
7.80
7.75
7.70
7.65
7.60
7.55
7.50
7.45
7.40
7.35
2.60
2.55
2.50
2.45
2.40
2.35
2.30
2.25
2.20
2.15
2.10
2.05
7.30
2.00
Log (Delta P²)
7.95
Log (Fluid Flow Rate (se³m³/d))
Used
Transient
not-Used
Transient
Used
Stabilized
not-Used
Stabilized
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Log Scale
Example Well Name
Simplified AOF Analysis - Log Scale
1.0e+09
Delta P Squared
1.0e+08
1.0e+07
1000.0
100.0
10.0
1.0e+06
Fluid Flow Rate (se³m³/d)
Used
Transient
not-Used
Transient
Used
Transient
not-Used
Stabilized
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Inflow Performance
Example Well Name
Well IPR - Simplified (Rawlins and SchellHardt, 1936)
15000
14000
13000
12000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
400.0
350.0
300.0
250.0
200.0
150.0
100.0
50.0
0
0.0
Sandface Pressure (kPaa)
11000
Fluid Flow Rate (se³m³/d)
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