Vertical well – the apparent deviation angle with respect to bedding is less than 30°
Moderately deviated well – the apparent deviation angle is between 30° and 60°
High angle (HA) well – the apparent deviation angle is between 60° and 80°
Horizontal (HZ) well – the apparent deviation angle is greater than 80°
ØTo drill HA/HZ wells, its either you use geometric means or geo-steering means
ØGeometric means is basing your decisions/trajectory only on the seismic targets (TVD, northing, easting, etc)
ØGeo-steering means deciding the direction in which to drill from knowledge of the geology and from measurements taken while drilling
What do you think?
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