Pseudo Dir Surveys

This tool calculates a pseudo directional survey from the surface location, bottom hole location, and TD.  

To recalculate either the surface  or bottom hole locations, select Compute>From Locations>Calc Surface or Bottom-Hole Loc From Dir Survey from the menu bar at the top of the Main Module.  Note that this tool will work on all selected wells.

2 Pts Method

The 2 points method creates two directional survey points - one at the surface location, and one at the BH location.  Note that Petra will assume a straight line  the two using the well's TD as a distance.  Importantly, this method will grossly misrepresent directional wells

3 Pts Method

Longitude or X Coord - These dropdowns select the zone and data item containing the longitude, X coordinate, or offset of the kick off point.  The dropdown at the bottom of this window will set what the selected data item represents.

Latitude or Y Coord - These dropdowns select the zone and data item containing the latitude, Y coordinate, or offset of the kick off point.  The dropdown at the bottom of this window will set what the selected data item represents.

Depth Option - This option sets the kickoffpoint's depth.  This entry can be either set to a formation depth, constant value in measured depth, or the well's TD.

Location Zone Dropdown

Location Zone Items are Lat-Long Values - This dropdown sets the kickoff points as latitude and longitude values.

Location Zone Items are X-Y Coordinates - This dropdown sets the kickoff points as X and Y

Location Zone Items are XY Offsets From Survey Location - This dropdown sets the kickoff points as X and Y offsets from the surface point.  

Kick Point Same as Surface Location - This dropdown sets the kickoffpoint as being directly beneath the surface location.