GasWell Optimization GasWell is an easy to use package used for optimizing the performance of a gas...

GasWellOptimizationGasWell

Optimization

SiriusPetroleum Software

SiriusPetroleum Software

GasWell Optimization

GasWell is an easy to use package used for optimizing the performance of a gas well. Sandface inflow, tubing performance and wellhead conditions are used to maximize

production. With this package the user can investigate the flow improvement after

stimulation, increasing the wellbore, and lowering wellhead pressure. Up to six different wellbore sizes can be investigated in one run.

GasWell, Sirius Petroleum Software 3

GasWell OptimizationAgenda

• Well data

• Pool data

• Gas analysis data

• Special Features, Methods and Correlations

• Output Reports and Graphs

• Demo

• Question


Well Data

• Wells are defined within a pool, group, and a lease.

• Well data includes: Elevations, Perforations, wellhead conditions.

• Deliverability: AOF parameters.• Directional Drilling Survey.• Wellbore: Tubing, Casing or Annular.


Well Data


Well Deliverability


Well Directional


WellBore


Well Working Interests


Well Elevations


Well Perforations


Pool Data

• Reservoir Data: Initial Pressure, Formation Temperature, and Datum Elevation.

• Abandonment: Pressure


Pool Data


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.


Gas Analysis


Gas Analysis11-27 Turner Valley Formation

Detailed 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+


GasWellSpecial Features

• Well Deliverability– Simplified (Rawlings

and Schellhardt(1936)

– LIT-Pressure

– LIT-Pressure Squared (Houpert, 1959)

– LIT-Pseudo Pressure (Al-Hussainy, 1965)

– Gas IPR (Aronofsky and Jenkins, 1954)

• Bottomhole Pressure– Average Density

method.

– Average Temperature and Average z-factor method.

– Sukkar and Cornell method.

– Cullender and Smith (1959)


GasWellSpecial Features cont.

• True vertical depth– Segmented

– Tangential

– Average Angle

– Radius of Curvature

– Minimum Curvature

• Wellbore– Tubular flow

– Casing flow

– Annual flow

– Size different sizes


Calculation Methods


Correlations


Output, Reports and Graphs• Table of results for current time step• Diagram of results• Table of results by component

– Deliverability, AOF, Production, Compression, Gas analysis, Heating Value

• Numerous reports– Well, pool, group, lease, company, etc.

• Numerous graphs


Reports


Graphs


Graphical Results10-10 Example Well, Example Pool

Wellbore Gas Flow @Wellhead=4000.0 kPaa

Ga

s F

low

Ra

te (

se

³m³/

d)

Tubing ID (mm)

0

20

40

60

80

100

120

140

160

180

200

0

10

20

30

40

50

60

70

80

90

10

0

110

12

0

13

0

14

0

15

0

10-10 Example Well, Example PoolWell Sandface IPR @Wellhead=4000.0 kPaa

Inflow

20.000 mm

40.000 mm

60.000 mm

80.000 mm

100.000 mm

140.000 mm

Sa

nd

fac

e P

res

su

re (

kP

aa

)

Gas Flow Rate (se³m³/d)

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

11000

12000

0

20

40

60

80

10

0

12

0

14

0

16

0

18

0

20

0

GasWell Optimization GasWell is an easy to use package used for optimizing the performance of a gas...

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