The apparent dip angle is always less than the truedip. ![]() If an inclined drillhole does not plunge directly into the vertical plane of the drillsection, then its inclination on the drill section will appear as an“apparent dip”. The projection is done along aline perpendicular to the drill section line. For example, if the drill section scale is 1 inch =10 feet, then a drill hole with a total depth (TD) of 100 feet will be 10inches long.Drill holes which are not situated exactly along the drill section linecan be “projected” onto the plane of the drill section (within areasonable distance) (Figure 16 – 4). The length of theline(s) which illustrate the drill hole are determined by the scale of thedrill section.
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