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A new feature added to WinLoG Version 4 is the ability to represent deviated boreholes.
What is a deviated borehole?
Boreholes are designed to obtain information in the third dimension, ie. at depth, below the two-dimensions of the earth's surface. Today it is relatively easy to determine position on the surface, but not so at depth. Unfortunately, all too often, the path of the hole is erroneously assumed to follow the original dip (or inclination) and azimuth (or direction) established at the collar, at the top of the hole. Numerous borehole surveying devices have been developed, none of which are perfect, however quite accurate results are possible by using the right tool in the right hole.
How is a borehole deviation survey accomplished?
A borehole deviation survey is usually accomplished by moving a probe along the hole and sensing the movement of the probe relative to one or more frames of reference which may include the earth's gravitational field, magnetic field or other inertial reference, and/or by sensing the distortion or bending of the housing of the probe itself. The different methods each have their own advantages and limitations such as ability / inability to operate inside steel casing, speed and complexity of operation, accuracy, cost, distance between measurements, ruggedness and reliability.