DTHETA

Recognised by the OPM Flow parserGRID

DTHETA defines the size of all grid blocks in the Theta direction via an array for each cell in model. The RADIAL or SPIDER keyword in the RUNSPEC section should be activated to indicate that radial or spider geometry is being used.

This keyword is not supported by OPM Flow but would change the results if supported so the simulation will be stopped.

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 the SPIDER keyword activates OPM Flow’s radial grid geometry option for the model. This keyword will create a spiderweb-shaped grid based on a corner-point grid using the standard radial grid keywords: INRAD, DRV, DTHETAV, DZ/DZV etc. in the GRID the section. Spider and Radial grids generated by OPM Flow will be displayed the same in OPM ResInsight, as they are both output as Cartesian Irregular Corner-Point Grids. The difference is that the radial model’s pore volumes are adjusted to match the radial geometry pore volumes, whereas the Spider grid volumes are not adjusted. See also the DRV, DTHETAV, DZ and TOPS keywords in the GRID section to fully define a radial or spider grid model.

Records

An array of values covering the grid

Parameters

Example

Given the dimensions of the grid in the RUNSPEC section to be 10, 6, 1 for NX, NY and NZ respectively, then DTHETA should be defined as:
--
-- DEFINE GRID BLOCK SIZES IN THE THETA DIRECTION
--
DTHETA
10*60.0
10*60.0
10*60.0
10*60.0
10*60.0
10*60.0
/
The above example defines the size of the cells in the R direction based on 60 cells in the model as defined by the DIMENS keyword in the RUNSPEC section.

Manual source: parts/chapters/subsections/6.3/DTHETA.fodt