Borehole Survey

The measurement of the directional trajectory (azimuth and inclination) of a borehole at regular intervals along its length, ensuring accurate three-dimensional positioning of geological samples and geophysical measurements. Borehole deviation is common in deep or long holes, and survey data corrects drill hole collar coordinates to true downhole positions. In resource estimation, accurate borehole surveys are essential for correct geological interpretation and geostatistical modelling. Survey tools include gyroscopic, magnetic, and electronic multi-shot instruments.