Sample Grid to Wells

This operation calculates the grid value at a well’s location and store it to the well's data item.

To sample a grid to a set of wells, select Contours>Grids>Sample Grid to Wells.

Data tab

The Data tab sets the grid to sample and the data item that stores the grid value.

Grid File To Sample

This dropdown selects the grid to sample to the wells.  This list of wells can be reordered by creation date or by name.

Well Z Data To Sample To

Zone - This dropdown selects the zone containing the desired data item.

Item - This dropdown selects the data item containing the sampled grid value.

Set Zs not sampled from Grid to a NULL value - This option will overwrite the data item with a null wherever there is no grid value.

Sample to NULL Values Only - This option will only sample data values to empty data items.  In other words, this option will prevent the grid from overwriting preexisting values.

Apply Datum Elevation (SS Structure Grids Only) - This option will use each well's datum elevation to create a pseudo-MD data value.

Sample Increment for Directional Wells (in Depth Units) - This option sets the sample increment

Assign Quality Code to Sampled Wells - This option assigns a quality code to all sampled data items.

Limits tab

The Limits tab restricts how Petra handles wells that do not penetrate the grid.

Sampling a grid to individual wells