Note

Currently g-Space supports import checkshot data from KB datum.

Import checkshots steps:

Step 1: Locating the file

To load checkhots go to Ribbon -> Wells bar and click on Load check shots button

A checkshot file is a TAB-delimited *.checkshot file. It contains the following columns:

• UWI - well identifier (optional; if absent, the file name is used to match the well)
• TVD - true vertical depth (required)
• Time - travel time (required)

In the appeared dialog box locate the files and click open:

Step 2: Setting up reading parameters

g-Space will open file preview dialog were you can set the loading parameters such as: Separator type, Headers row, Start row, End row.

In the Original file tab you will see how files looks like and adjust loading parameters accordingly. Also set the import parameters:

• Checkshot type - OWT (one-way time) or TWT (two-way time)
• Time measure unit - s or ms
• Save mode - Create new checkshot or Append to current checkshot

Step 3: Checking reading parameters

Click on the Parsed file tab to check if you set reading parameters correctly and also you can decide which columns you want to add or skip

In the Field connections check the parameters. If you have files with additional information you can choose skip unnecessary columns from drop-down box.

Note

If some of the fields are colored RED, it means that data doesn't have required type or reading parameters were set incorrectly

Step 4. Checking the loading settings

In Data tab you can see if all settings were done correctly and all necessary columns were included. After that click OK

You can evaluate loaded data by clicking on map view or in table below map. All loaded information will appear in table Checkshot where you can check the values. Also you can see the data in log preview to the right

Checkshots from Sonic log

If a well has a sonic log, a checkshot can be created from it instead of importing a file. Select the well, double-click it on the map and open the Create checkshot from sonic dialog, then set:

• Sonic - the sonic curve to use
• Units - the sonic units, us/m or us/ft
• Step - the depth step (in m or ft, according to the project units)
• First velocity value - the starting velocity above the first sonic sample

Click OK to create the checkshot from the sonic curve.

For more information about checkshot format please refer to Well Data Formats