MULTR-

Variant 1 — GRID section

Part of the MULT_XYZ keyword family in the OPM Flow parser.

MULTR- multiples the transmissibility between two cell faces in the -R direction for all the cells in the model via an array, that is the keyword sets the transmissibility multiplier of block (I, J, K) between the cells (I-1, J, K) and (I, J, K). An alternative to defining the complete array is to use the BOX keyword to define an area of the grid and then use the MULTR- keyword to set the multipliers just for the area defined by the BOX keyword (see the example).

The keyword should only be used with radial and spider grids, as declared by the RADIAL or SPIDER keywords in the RUNSPEC section.

Notes:

The number of entries should correspond to the NX x NY x NZ parameters on the DIMENS keyword in the RUNSPEC section, unless the BOX keyword defines a sub area of the grid, in which case the total number of entries should correspond to the number of cells defined by the BOX statement.

The keyword is terminated by a “/”.

Note that OPM Flow does not require the GRIDOPTS(TRANMULT) parameter in the RUNSPEC section to be set to YES, in order to use this and other negative directional dependent multiplier keywords in the input deck. Whereas, the commercial simulator will terminate with an error if the keyword is present, and the GRIDOPTS(TRANMULT) parameter has not been set to YES.

See also the MULTR, MULTTHT, MULTTHT-, MULTZ and MULTZ- keywords for scaling transmissible between cells in the R direction.

Parameters

Example

--
-- DEFINE INPUT BOX FOR EDITING INPUT ARRAYS
--
-- ---------- BOX ---------
-- I1 I2 J1 J2 K1 K2
BOX
10 10 1 6 1 1 / DEFINE BOX AREA
--
-- SET MULTR- TRANSMISSIBILITY MULTIPLIERS
--
MULTR-
6*0.500 /
--
-- DEFINE END OF INPUT BOX EDITING OF INPUT ARRAYS
--
ENDBOX
The above example defines a 0.5 scaling multiplier for the six cells defined by the preceding BOX statement. The ENDBOX keyword resets the input box to the full grid.

Manual source: parts/chapters/subsections/6.3/MULTR-.fodt

Variant 2 — EDIT section

MULTR- multiples the transmissibility between two cell faces in the -X direction for all the cells in the model via an array, that is the keyword sets the transmissibility multiplier of block (I, J, K) between the cells (I-1, J, K) and (I, J, K). The keyword should only be used with radial grids, as declared by the RADIAL keyword in the RUNSPEC section.

See MULTR- - Multiply Cell Transmissibility in the -R Directionin the GRID section for a full description.

Manual source: parts/chapters/subsections/7.3/MULTR-.fodt

Variant 3 — SCHEDULE section

MULTX- multiples the transmissibility between two cell faces in the -X direction for all the cells in the model via an array, that is the keyword sets the transmissibility multiplier of block (I, J, K) between the cells (I-1, J, K) and (I, J, K). The keyword should only be used with radial grids, as declared by the RADIAL keyword in the RUNSPEC section.

See MULTR- - Multiply Cell Transmissibility in the -R Directionin the GRID section for a full description.

Manual source: parts/chapters/subsections/12.3/MULTR-.fodt