MWaof Mwaof uses standard back pressure test results and flow rates of gas plus liquids from...

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.

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MWaofAgenda

• 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 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+

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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)

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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 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+

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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

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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