A real, dimensionless number specifying the geometric factor for the well element.
This factor depends upon the placement of the well within the grid block and upon the placement of the grid block relative to the boundaries of the reservoir.
Values for geofac are given in Figure A-1 in Appendix A of this manual.
In that figure, geofac is referred to as "CC".
When *GEOA or *KHA is in force for the well index calculation, the value of geofac is ignored, although it is still required on the *GEOMETRY line.