WINJGAS
Recognised by the OPM Flow parserSCHEDULE
The WINJGAS keyword defines the properties of the injection gas stream, for a given well. Once a gas well stream has been defined via the WELLSTRE keyword in the RUNSPEC section, it can be used with either the WINJGAS or GINJGAS keywords, to set the injected gas composition. Similarly, if an oil well stream has been defined by WELLSTRE, then the well stream can be used with the WINJOIL keyword in the SCHEDULE section, to specify the injected oil composition. Note that, it is unnecessary to use WINJGAS for wells subordinate to a group having gas injection control, with the gas properties set by GINJGAS keyword in the RUNSPEC section. In this case the injection stream is defined by the GINJGAS keyword. However, if a gas injection well under group control users the WINJGAS keyword, then this fluid, and not the group's fluid will be injected instead, at a rate controlled by the group.
The keyword should only be used if the CO2STORE and GASWAT keywords in the RUNSPEC section have also be activated for the gas-water two component model.
Note
This is an OPM Flow keyword used with OPM Flow’s CO2STORE and GASWAT keywords in the RUNSPEC section, and should not be confused with the more general version of the WINJGAS keyword used in the commercial compositional simulator.
Secondly, although OPM Flow parses the keyword, the simulator currently ignores the data for this keyword.
Notes:
The keyword is followed by any number records with each record terminated by a “/” and the keyword should be terminated by a “/”.
- Records
- One or more records, each terminated by
/ - Items per record
- 5
Parameters
| No. | Name | Description | Type | Dimension | Default |
|---|---|---|---|---|---|
| 1 | WELLmanual: WELNAME | A character string of up to eight characters in length that defines the injection well name, for which the gas injection properties are being specified. Note that the well name (WELNAME) must have been declared previously using the WELSPECS keyword in the SCHEDULE section, otherwise an error may occur. | STRING | None | |
| 2 | FLUIDmanual: STREAM | A defined character string that determines the properties of the injection gas, and as should be set to one of the following values: GAS: The field separator gas composition is used as the injected gas. GRUP: The well's group or upstream group injection fluid is used as the injected gas. GV: This option enables the vapor production of a group, as declared via the SOURCE parameter on this record, to be used as the injected gas composition. MIX: In this case, the gas injection composition is taken from either the WINJMIX or WINJORD keywords in the SCHEDULE section, with the name of injected fluid given by the SOURCE parameter on this record. STREAM: Here the gas injection composition is given by the WELLSTRE keyword in the SCHEDULE section, with the name of injected fluid given by the SOURCE parameter on this record. WV: This option enables the vapor production from a given well to be used as the injected gas, with the name of the well given by the SOURCE parameter on this record. Only the STREAM option is supported by OPM Flow. | STRING | GRUP | |
| 3 | STREAMmanual: SOURCE | A character string of up to eight characters in length, that defines the source of the gas injection stream, based on the value of STREAM. If STREAM equals GV, then source should be set to a group name. For STREAM equal to MIX or STREAM, then SOURCE should be set to the name of the gas stream, as defined by the WINJMIX, WINJORD, or WELLSTRE keywords. | STRING | None | |
| 4 | MAKEUPGASmanual: MAKEUP | The name of the well stream used for the make-up gas, if make-up gas is required for WELNAME to match the injection target for the well. This option is not supported by OPM Flow. | STRING | None | |
| 5 | STAGE | STAGE defines the separator stage from which the injection gas should be taken from. In this case, the vapor phase from any stage may be used, and the default value of zero users the total vapor phase from the separator. This option is not supported by OPM Flow. | DOUBLE | 1 | 0 |
Example
The following example defines how to specify a two component formulation, together with defining the names of the composition components, to be used with the CO2STORE and GASWAT options.
-- ==============================================================================
--
-- PROPS SECTION
--
-- ==============================================================================
PROPS --
-- CONFIRM NUMBER OF COMPOSITIONAL COMPONENTS (OPM FLOW KEYWORD)
--
NCOMPS
2 /
--
-- DEFINE COMPOSITIONAL COMPONENTS NAMES (OPM FLOW KEYWORD)
--
CNAMES
'CO2'
'H2O' /
The second part of the example, defines the well stream for the above two component CO2 water system.
-- ==============================================================================
--
-- SCHEDULE SECTION
--
-- ==============================================================================
SCHEDULE
--
-- WELL STREAM INJECTION COMPOSITION (OPM FLOW Keyword)
--
-- WELL -- WELL STREAM COMPOSITIONAL COMPONENT --
-- STREAM -- MOLE FRACTIONS --
WELLSTRE
'C02STREAM' 1.000 0.000 /
/
--
-- WELL GAS INJECTION PROPERTIES
--
-- WELL STREAM SOURCE MAKEUP SEP
-- NAME OPTION DEPTH GAS STAGE
WINJGAS
GI01 STREAM C02STREAM 1* 1* /
/
Here the well stream consists of 100% CO2 and zero water, with well GI01 using the gas injection properties as defined by the WELLSTRE keyword and allocated via the WINJGAS keyword.
Finally, the gas injection rate is set via the WCONINJE keyword as shown below.
--
-- WELL INJECTION CONTROLS
--
-- WELL FLUID OPEN/ CNTL SURF RESV BHP THP VFP
-- NAME TYPE SHUT MODE RATE RATE PRES PRES TABLE
WCONINJE
GI01 GAS OPEN RATE 10E4 1* 300 1* 1* /
/
Thus, gas injector GI01 will inject 10 x 104 m3 of CO2 per day, assuming metric units.
| Note This is an OPM Flow keyword used with OPM Flow’s CO2STORE and GASWAT keywords in the RUNSPEC section, and should not be confused with the more general version of the WINJGAS keyword used in the commercial compositional simulator. Secondly, although OPM Flow parses the keyword, the simulator currently ignores the data for this keyword. |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|Manual source: parts/chapters/subsections/12.3/WINJGAS.fodt