RockWorks | ModOps | Grid | Grids -> Strat
Given a list of grid models, this program will define (or redefine) the contacts within existing stratigraphic logs based on the contents of a list of one or more stratigraphic surface models. Sample applications include:
- Interpolating elevations for missing contacts within borehole files (e.g. lost circulation intervals).
- Estimating what a log might look like before the borehole is drilled (i.e. prediction).
Caveats:
- Items within the datasheet "Unit" column must already exist within the project's Stratigraphy Type Table.
- This program only works with vertical boreholes.
Menu Options
Step-by-Step Summary
- Data Columns:
- Titles: Column listing the names of the stratigraphic units. These must match the names in the project's Stratigraphy Types Table.
- Superface Grid: Datasheet column that contains name of grid file (.RwGrd file) that represents top of unit (formation). The grid models listed here must reside in the same folder as the grid list .RwDat file.
- Subface Grid: Datasheet column that contains name of grid file that represents base of unit (formation).
- Overwrite Existing Data: If unchecked, this program will only fill in stratigraphic contacts that have not already been defined within the borehole records. Note that if units are missing from the original data, they may be added during this process.
- Prompt Before Overwrite: If checked, the program will ask before overwriting existing stratigraphic contact data. This dialog box will include a summary of what's actually being overwritten (e.g. borehole ID, formation name, old depth, and new depth).
! Be warned - if you are overwriting many holes, you'll see a lot of prompt windows.
- Decimals: Decimal places to be used when saving contact depths within stratigraphy records.
- Backup your borehole database - just in case!
- Access the RockWorks Datasheet program tab.
- Open the datasheet that lists the formation names and upper- and lower-surface grid names. (More.)
- Select the ModOps | Grid | Grids -> Strat menu option.
- Enter the requested menu settings, described above.
- Click the Process button to continue.
The program will read the listed grid models and, for each borehole in the current project folder, determine the depths to each formation top and base (e.g. the borehole's intersection with the grid models). The depths will be posted to each boring's Stratigraphy data tab. If you requested overwrite warning, the program will display each existing contact that will be overwritten. You can click Yes or No as appropriate.
Notes:
Any disabled rows in the grid list datasheet will be ignored.
If there is an empty cell for the superface or subface the program will skip that unit.
If the program encounters a null value within a grid, that unit will be skipped.
- You can click in the Borehole Manager to view the updated stratigraphic data. You can use the Striplogs menu items to display these intervals in 2D or 3D logs or log sections.
Back to Grid Menu Summary
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