gastank gastank uses reservoir pressure and produced volumes of gas plus liquids from individual...
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Gas Tankfor Windows
Gas Tankfor Windows
SiriusPetroleum Software
SiriusPetroleum Software
GasTank
GasTank uses reservoir pressure and produced volumes of gas plus liquids from individual
wells and determines the IGIP using volumetric, planimetric and material balance methods.
Results are summarised by well, group, pool, lease and company.
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GasTankAgenda
• Well data
• Pool data
• Lease 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.
• Volumetric Data: Drainage area, netpay, porosity, water saturation.
• Material Balance Data: Pressure and production history.
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Well Data
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Volumetric Data
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Material Balance Data
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Analysis Options
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Analysis Results
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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, rock and water compressibility.
• Planimetric data: average porosity, average water saturation, contour value and contour areas.
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Pool – General Data
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Pool – Reservoir Data
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Pool – Planimetric Data
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Pool - Contour Data
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Lease Data
• Basic Data: Lease name or number, number of wells in lease, working interest for each company.
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Lease 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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GasTankSpecial Features
• Data Selection
– Fluid options: gas only, or total fluid (gas+liquid)
– Data selection: all points, all selected points, or all selected by type.
• Analysis Methods
– Tank type, P/z versus Cumulative production
– Full Material Balance, Pressure method
– Full Material Balance, IGIP method
– Full Material Balance, Havlena & Odeh (1963-64) method
• Contour Area Methods– Gauss-Green method
• Bulk Volume Methods– Trapezoid, Pyramid, Combination, Simpson's
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System Options
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Correlations
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Planimetric Methods
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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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P/z AnalysisExample Well Name
Well P/z versus Cumulative Production
UsedBuildupdata
un-UsedBuildupdata
P/ztrendline
P/z
(kP
aa
)
Cumulative Production (se6m³)
0
5000
10000
15000
20000
25000
30000
35000
40000
0
50
10
0
15
0
20
0
25
0
30
0
35
0
40
0
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Z-factorExample Pool Name
Pool z-factor versus Pressure
z-fa
cto
r @
10
0 °
C
Pressure (kPaa)
0.80
0.85
0.90
0.95
1.00
0
50
00
10
00
0
15
00
0
20
00
0
25
00
0
30
00
0
35
00
0
40
00
0