Adding New Columns

Once imported and corrected, drilling data usually requires further processing before any models are built. Leapfrog Geo has a number of tools for processing drilling data; some of these options add new columns to existing tables and some create new tables.

Options that add new columns to existing tables are:

• Selecting Intervals. If the lithologies in a column are poorly sorted, you can display the column in the scene and use the interval selection tool to work with all the segments and sort them into new units.
• Splitting Lithologies. Lithology units may be incorrectly grouped, which can become apparent when you display drillholes in the scene. The split lithologies tool lets you create new units by selecting from intervals displayed in the scene.
• Grouping Lithologies. The group lithologies tool lets you define a new unit to which existing units are added. For example, a sandstone deposit might appear in an interval table as poorly-sorted and well-sorted units. The group lithologies tool lets you group both units into a single sandstone unit.
• Overlaid Lithology Column. You may have two versions of an interval column, one that contains draft data and one that contains the final version. The final version may contain gaps, which can be filled in using the draft version. The overlaid lithology tool lets you combine the two columns to create a new column.
• Category Column From Numeric Data. When you have numeric data you wish to use with the lithology and category modelling tools, you can convert the numeric data to a category column.

• Evaluated Columns. An evaluated column adds data to a table from another source within the project, often integrating some information generated from your analysis activities back onto some source data tables (back-flagging).

• Majority Category From Other Table. When you have category data such as economic compositing status or lithology data from another table, you can back-flag it onto an interval table.