Overwrite existing tops: Turn this on to overwrite well tops that already exist in the database where the name and source match the tops in the file. Turning this item off will allow you to import multiple tops with the same formation name for a given well. 

Depth: Select the format of the depth values for the input tops. This is only used when importing columnar data. Note: When importing curves from LAS files they are always assumed to be measured depth.

• Subsea: Tops in the file represent subsea values.
• Measured Depth: Tops in the file are in measured depth.
• TVD: Tops in the file are in true vertical depth.
• Generic Depth: Tops in the file represent depth values (i.e. they have depth units) but are not referenced against the datum elevation for display purposes.
• Unitless Value: Tops in the file represent generic values that have no depth units. This type is often used to post arbitrary values on the map.

Import entities as columns: Turn this on when the entities in the columnar ASCII production file appear as column headings. When this is turned on, you will also be required to map the entity names on the Production Import Parameters page of the Well Import wizard. Note: In addition to the entity name, the column header must also contain a fluid identifier.

If entity exists: Specify the overwrite behavior when a production entity already exists in the database.

• Append: If an entity exists in the database, add additional information from the file to the database, but don't alter existing data. This will commonly be used when you are adding new monthly production data, but don't want to alter existing records.
  
• Overwrite: If an entity exists in the database, replace any existing information with information found in the file. Any information that exists in the database but not in the file will remain unchanged.
• Skip: If an entity exists in the database, skip the well and do not add any additional information.
  

Calibrated: Indicates that the raster logs have been calibrated.