Reservoir Model description
Reservoir.ors Reservoir Model description
Each keyword must be on a separate line; data start on a new line
1.Reservoir Model type: DECLINE - decline curve, MATBAL - material balance
MODELTYPE
TIGHTGAS -- DECLINE || MATBAL || TIGHTGAS
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2.User model description (in 'quotes' on a single line)
DESCRIPTION
'Reservoir Model A, updated as of 01.01.2024'
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3.List of PVT models as tables (file names with extension)
Each file name must be on a separate line
PVTLIST
[File name]
'OIS.PVT.format.opvt'
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4.List of PVT models as correlations (file names with extension)
Each file name must be on a separate line
PVTCORRLIST
[File name]
'FluidModel.ofm'
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5.Keywords for describing the material balance model (MODELTYPE TIGHTGAS /)
6.WELLLIST
/*
WELLLIST - list of wells and their properties
First row - list of columns
Second and subsequent rows - table (1 row - 1 well)
Column list:
WELL - Well name
ENABLE - Use in calculation (1 - use, 0 - do not use)
TYPE - model type (RADIALRES - vertical well in a bounded radial reservoir | VERTFRAC - vertical well with HF in a bounded radial reservoir)
RW - Well radius, m
SKIN - Skin factor
DFACTOR - Non-Darcy skin factor, 1 / (thsd m³/day)
PRESS - Initial pressure, atm
TEMP - Temperature, °C
PERM - Permeability, mD
RE - Drainage radius, m
PORO - Porosity, unit fraction
THICKNESS - Reservoir thickness, m
SWL - Connate water saturation, unit fraction
CPTYPE - Pore volume compressibility type (USERDEFINED | CORRELATION)
CP - Pore volume compressibility, 1/atm
CW - Water compressibility, 1/atm
PVTREGION - PVT region name
*/
WELL ENABLE TYPE RW SKIN DFACTOR PRESS TEMP PERM RE PORO THICKNESS SWL CPTYPE CP CW PVTREGION
'well1' 1 RADIALRES 0.1 0.0 0.0 200.0 60.0 0.2 300.0 0.3
30.0 0.1 USERDEFINED 0.00005 0.00002 'zone_1'
'well2' 1 VERTFRAC 0.2 1.0 0.0 201.0 61.0 0.21 351.0 0.31
35.00.11 USERDEFINED 0.00006 0.00001 'zone_1'
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/*
7.WELLHISTORYDATA - Well production history
First row - list of columns
Second and subsequent rows - table
Column list:
WELL - well name, required column, always first
STEP - calculation step number (starts from 1)
BHP - bottomhole pressure, atm
GAS - gas flow rate, thsd m³/day (or gas production, thsd m³, or cumulative gas production, thsd m³)
BREAK - break status (0 - no break, 1 - break present)
*/
WELLHISTORYDATA
WELL STEP BHP GAS BREAK
'well1' 1 200 27.869 1
'well1' 2 195 22.39 0
'well2' 1 201 25.325 1
'well2' 2 196 21.47 0
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8.Calculation steps
CALCSTEPS
01.01.2021 date[dd.mm.yyyy] and time[hh:mm:ss] of the step start (time is optional, default 00:00:00)
01.02.2021 12:45:32 step start date and time / previous step end date and time
01.03.2021 previous step end date and time
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9.Calculation settings
CALCSETTINGS
[Parameter type] [Parameter value]
HISTORYMODE CUMULATIVE -- production/injection history (PERIOD | CUMULATIVE | RATE), PERIOD - per period (default), CUMULATIVE - cumulative, RATE - daily rates
PVTMODE CORRELATION -- PVT modeling method (TABLE | CORRELATION), TABLE - tables, CORRELATION - correlations
PSEUDOTIME USEBHP -- pseudo time calculation method (NONE | USEBHP | USEPRES)