With Strater 3 you can calculate the True Vertical Depth (TVD), a mathematical approximation of the true X,Y,Z path along a well, from your measured depth, azimuth, and inclination. Strater 3 comes equipped with 5 true vertical depth calculation methods, Tangential, Average Tangential, Balanced Tangential, Radius of Curvature, and Minimum Curvature, allowing you the freedom to choose the calculation that best fits your well's specific situation.
Display Your Log in True Vertical Depth
- To display a well log at True Vertical Depth in Strater 3, first click Log from the toolbar to select a log type. I will choose a Line/Symbol log.
- Click in the Borehole View to access the Open dialog and select and open a data file containing Hole ID, Depth, Inclination, Azimuth, and any other associated well data. You can download the same example data that I will use by clicking here.
- I will accept the defaults in the Specify Worksheet Column Definitions dialog by clicking Next, and then in the Specify Data Type and Column Positions dialog I will select the drop down menu next to Data and select Au (ppb) and then click Load.
- I will add a Depth log by clicking Log | Depth from the toolbar, and then I will click next to my Line/Symbol log in the Borehole View to position the Depth log next to it.
- To display the Line/Symbol log in True Vertical Depth, I will click Borehole 1:DH-1 in the View Manager, and then in the Property Manager I will click the drop down menu next to Depth Method and click True Vertical Depth.
You have now displayed your Line/Symbol log in True Vertical Depth. You can also calculate the True Vertical Depth values from the Strater worksheet using the Create TVD command. Calculate True Vertical Depth Values
- To calculate the True Vertical Depth values in the Strater 3 worksheet, I will select the Sheet 1 tab.
- From the toolbar, I will click Data | Create TVD to open the Convert from Measured Depth to True Vertical Depth dialog. I will click the drop down menu next to True vertical depth calculation method to select Minimum Curvature and then click OK.
You should now see a column labeled TVD with the True Vertical Depth values.