Well

A well is a mine working with a circular section, drilled from the surface of the earth or from an underground working without human access to the bottomhole at any angle to the horizon, the diameter of which is much smaller than its depth. The location of the well on the map defines the coordinates (XYH) of the wellhead, which are used as the starting point for directional survey calculations.

Well cluster - a set of wells, the heads of which are grouped at a close distance from each other on a common limited area (base). The well cluster is represented on the map by a set of point objects. The main dataset object defines a central well, the location of which defines the origin of the local coordinate system for making graphical reports.