WellDatabase utilizes EPSG:4326/ WGS-84 CRS (Coordinate Reference System).
Shapefiles
When you export a shapefile, the prj file, also known as the projection file, will contain important information about the Coordinate Reference System (CRS). The CRS defines the spatial reference system used to represent geographic features in the shapefile.
List Export
In the list export, you will need to select the "Well Location" data type and look for the column labeled EPSG. The EPSG column contains a unique 4-5 digit code that represents the CRS.