PVTGWO
Recognised by the OPM Flow parserPROPS
PVTGWO defines the gas PVT properties for wet gas1 Natural gas that contains significant heavy hydrocarbons such as propane, butane and other liquid hydrocarbons is known as wet gas or rich gas. The general rule of thumb is if the gas contains less methane (typically less than 85% methane) and more ethane, and other more complex hydrocarbons, it is labeled as wet gas. Wet gas normally has GOR's less than 100,000 scf/stb or 18,000 Sm3/m3, with the condensate having a gravity greater than 50 °API. with vaporized water and oil. This keyword should be used when the VAPOIL and VAPWAT keywords have been declared in the RUNSPEC section indicating that vaporized oil and water are present in the wet gas phase. The keyword may be used for oil-water-gas input decks that contain the wet gas with vaporized oil and water phases.
Natural gas that contains significant heavy hydrocarbons such as propane, butane and other liquid hydrocarbons is known as wet gas or rich gas. The general rule of thumb is if the gas contains less methane (typically less than 85% methane) and more ethane, and other more complex hydrocarbons, it is labeled as wet gas. Wet gas normally has GOR's less than 100,000 scf/stb or 18,000 Sm3/m3, with the condensate having a gravity greater than 50 °API.
This keyword is not supported by OPM Flow but would change the results if supported so the simulation will be stopped.
Note
This is an OPM Flow specific keyword for the simulator’s Water Vaporization Model that is activated by declaring that vaporized water is present in the run.
Notes:
The keyword is followed by NTPVT tables as declared on the TABDIMS keyword in the RUNSPEC section.
Each table must contain a minimum of two rows and a maximum of NPPVT rows and NRPVT Rw entries as declared on the TABDIMS keyword in the RUNSPEC section.
Apart from the PRES data there must be same number of entries for each column.
Each sub table defining the under saturated gas properties must be terminated by “/”.
Each main table is terminated by a single “/” on a separate line and there is no “/” terminator for the keyword.
See also the PVTG keyword in the PROPS section that defines the wet gas PVT properties when vaporized oil is present in the gas phase, and the PVTGW keyword in the PROPS section that defines the dry gas PVT properties when vaporized water is present in the gas phase. As an alternative to using the PVTGWO keyword, the PVTGW and PVTG keywords may be combined to fully define the wet gas PVT properties if both vaporized water and vaporized oil are present in the gas phase.
- Records
- One or more records, each terminated by
/ - Variadic
- The record accepts a variable number of items
Parameters
| No. | Name | Description | Type | Dimension | Field | Metric | Lab | Default |
|---|---|---|---|---|---|---|---|---|
| 1 | GAS_manual: PRESS | A real monotonically increasing down the column vector that defines the gas phase pressure, associated with the saturated water-gas ratio (“WGR”) or Rw, the saturated condensate-gas ratio (“CGR”) or Rv, the gas formation volume factor, and the gas viscosity for the corresponding pressure for the stated saturated RWS. For a given PRESS the variability of the gas formation volume factor and the gas viscosity with respect to the under-saturated Rw and Rv is optionally included as a sub table under RWU, RVU, FVFU and VISU columns, that is it is not necessary to repeat PRESS for each sub table entry. However, each sub table must be terminated by a “/”. The under saturated Rw and Rv entries are optional, except for perhaps the last PRESS entry to define the PVT properties above the initial saturation pressure. | DOUBLE | Pressure | psia | barsa | atma | None |
| 2 | DATAmanual: RWS / | A columnar vector of real positive numbers for both the saturated (RWS) and under saturated (RWU) Rw sub table entries. The RWS entry on the main table is the saturated WGR at the pressure indicated by PRESS and may be increasing or decreasing in value as PRESS varies. Subsequent under-saturated Rw for a sub table at the given PRESS, as defined by RWU, are monotonically decreasing for entries in a given sub table. | DOUBLE | OilDissolutionFactor, OilDissolutionFactor, OilDissolutionFactor, Viscosity | stb/ | sm3/ | rcc/ | None |
| 3 | RVS / | A columnar vector of real positive numbers for both the saturated (RVS) and under saturated (RVU) Rv sub table entries. The RVS entry on the main table is the saturated CGR at the pressure indicated by PRESS and may be increasing or decreasing in value as PRESS varies. Subsequent under-saturated Rv for a sub table at the given PRESS, as defined by RVU, are monotonically decreasing for entries in a given sub table. | stb/ | sm3/ | rcc/ | None | ||
| 4 | FVFS / | A columnar vector of real decreasing down the column values that defines the corresponding gas phase formation volume factor for a given pressure (PRESS) and for a given Rw (either RWS or RWU) and Rv (either RVS or RVU). | rb/ | rm3/ | rcc/ | None | ||
| 5 | VISS / | VISS a columnar vector of real increasing down the column values that defines the corresponding gas phase viscosity for a given pressure (PRESS) and for a given RWS and RVS. VISU a columnar vector of real decreasing from VISS down the column values that defines the corresponding gas phase viscosity for a given pressure (PRESS) and for a given RWU and RVU. | cP | cP | cP | None |
Example
--
-- GAS PVT TABLE FOR WET GAS WITH VAPORIZED WATER & OIL (OPM FLOW KEYWORD)
--
PVTGWO
-- PRES RW RV BG VISC
-- PSIA STB/MSCF STB/MSCF RB/MSCF CPOISE
-- ------ -------- --------- ------- ------
300 0.000479 0.000132 0.042340 0.01344
0 0 0.042310 0.01389 /
600 0.000469 0.000124 0.020460 0.01420
0 0 0.020430 0.01450 /
900 0.000403 0.000126 0.013280 0.01526
0 0 0.013250 0.01532 /
1200 0.000354 0.000135 0.009770 0.01660
0 0 0.009730 0.01634 /
1500 0.000272 0.000149 0.007730 0.01818
0 0 0.007690 0.01752 /
1800 0.000225 0.000163 0.006426 0.01994
0 0 0.006405 0.01883 /
2100 0.000191 0.000191 0.005541 0.02181
0 0 0.005553 0.02021 /
2400 0.000163 0.000225 0.004919 0.02370
0 0 0.004952 0.02163 /
/ TABLE NO. 1
-- PRES RW RV BG VISC
-- PSIA STB/MSCF STB/MSCF RB/MSCF CPOISE
-- ------ -------- --------- ------- ------
300 0.000479 0.000132 0.042340 0.01344 /
600 0.000469 0.000124 0.020460 0.01420 /
900 0.000403 0.000126 0.013280 0.01526 /
1200 0.000354 0.000135 0.009770 0.01660 /
1500 0.000272 0.000149 0.007730 0.01818 /
1800 0.000225 0.000163 0.006426 0.01994 /
2100 0.000191 0.000191 0.005541 0.02181 /
2400 0.000163 0.000225 0.004919 0.02370 /
/ TABLE NO. 2
The above example defines two wet PVT tables assuming NTPVT equals two and NPPVT is greater than or equal to eight on the TABDIMS keyword in the RUNSPEC section.
Notice that there is no terminating “/” for this keyword only for a table and a sub table.
| Note This is an OPM Flow specific keyword for the simulator’s Water Vaporization Model that is activated by declaring that vaporized water is present in the run. |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|Manual source: parts/chapters/subsections/8.3/PVTGWO.fodt