Importing Grids

There are 5 types of grid that can be imported directly into GridSTAT: PCMS, ZMAP and GeoGraphix, CPS-3, simulator grids such as VIP format, or RC² horizon grid. Simulator grids may be 3D grids while the rest are 2D grids.

Open a new project and go to Import panel.

From the Data Import list near the top of the panel select To Grid Data.

Enter the correct search path and click List File.

Check the desired grid file then click Preview. For multiple horizons, select the top horizon first. Preview as Data in order to reach the number portion of the file when text header is long.

To the right of the Convert button click the format list and select the correct format, ZMAP(GeoGraphix) for example.

Click the Convert button to import the file to GridSTAT. The resulted file will have extension GD3 which is called generic Attribute grid.

Go to GridOutput panel to graph the Attribute grid to make sure it is correct.

For multiple horizons, go to Horizons panel from the Tools pull down menu, check UNTITLED.GD3 (assuming UNTITLED is the current project), click Calcul., and select Add DepthGrid to add the newly imported grid to depth grid. Other horizons can then be imported and added. If there are crossing between the horizons, GridSTAT will modify the lower horizon to make the thickness no less than the minimum thickness (default 0) set in the Preferences panel under Tools pull down menu.

To extract markers or compare with existing markers, open a project with well logs, from Tools pull down menu go to Horizon Grid, select Depth Grid, select the imported depth grid, and click Sample then select Marker or Mistie. Sampled marker file will have extension IMK and mistie DAT, with the current project name as file name. To force tie the horizon grid to existing markers, open a new project, import the mistie file as XYZ data, make a mistie grid the same dimension as the horizon grid, then Add Mistie to the depth grid from the same Horizon Grid panel.

Simulation grids are ordered layer by layer, going from left to right starting from top North West cell. The different steps for importing simulation grids are listed below.

To the right of the Convert button click the format list and select Free Form (VIP...).

After clicking the Convert button, enter a keyword for the program to search for. In the file the keyword should be present before the grid array.

Then enter the dimension of the grid: NX, NY, NZ, X0, Y0, Z0, DX, DY, DZ. Correct NX, NY, NZ are required to obtain a meaningful display.

Importing Grid from XYZ Data  

For a grid file with X,Y or X,Y,Z locations, it can be imported as XYZ Data or Layer Data then saved as grid. To allow saving as grid, select only X, Y, (and Z), and Data columns for import.