ZCORN

Recognised by the OPM Flow parserGRID

ZCORN defines the depth of each corner point of a grid block on the pillars defining the reservoir grid. A total of 8 x NX x NY x NZ values are needed to fully define all the depths in the model. The depths specifying the top of the first layer are entered first with one point for each pillar for each grid block. The points are entered with the X axis cycling fastest. Next come the depths of the bottom of the first layer. The top of layer two follows etc.

The keyword can be only used be used with Irregular Corner-Point Grids.

Notes:

Regular Cartesian and Radial grid keywords cannot be used with this keyword, that is: DR, DRV, DTHETA, DTHETAV, DX, DXV, DY, DYV, DZ, DZV, INRAD, and TOPS.

The keyword is terminated by a “/”.

See also the SPECGRID, COORD and COORDSYS keywords to fully define an Irregular Corner-Point Grid.

Records

An array of values covering the grid

Parameters

Example

--
-- SPECIFY CORNER-POINT DEPTHS FOR A 3 x 2 x 2 GRID,
-- WITH CONSTANT SLOPE IN THE X AND Y DIRECTIONS
-- SUCH THAT ALL CORNER POINTS OF NEIGHBOURING BLOCKS ALIGN
ZCORN
--
-- top of layer 1
--
1450 1500 1500 1550 1550 1600
1500 1550 1550 1600 1600 1650
1500 1550 1550 1600 1600 1650
1550 1600 1600 1650 1650 1700
--
-- bottom of layer 1
--
1460 1510 1510 1560 1560 1610
1510 1560 1560 1610 1610 1660
1510 1560 1560 1610 1610 1660
1560 1610 1610 1660 1660 1710
--
-- top of layer 2
--
1460 1510 1510 1560 1560 1610
1510 1560 1560 1610 1610 1660
1510 1560 1560 1610 1610 1660
1560 1610 1610 1660 1660 1710
--
-- bottom of layer 2
--
1470 1520 1520 1570 1570 1620
1520 1570 1570 1620 1620 1670
1520 1570 1570 1620 1620 1670
1570 1620 1620 1670 1670 1720
/
The above example defines depths of the vertical coordinate lines for a regular 3 by 2 by 2 grid with a constant slope in the x and y directions such that all the corner points of neighboring blocks are aligned.

Related keywords

Cannot be combined with

GDFILE

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