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Overly Conservative Targets Small targets cost a large amount of money to drill as the directional driller in the field will not be afforded much fl xbl yf om h pl nn d j coy ndwllh osp ndmo g m s ng o h “ln ”. Curved Section Close Approaches Interpolating at long intervals when scanning can completely miss a close approach to approach another well. It is recommended to always perform a 3D visualization run down the planned well to visually sense the effects all close approaches. Initial numerical scan reports should always be run at 100 ft or 30 m intervals. Then refine localized zones with searches using 15 ft or 5 m intervals to better characterize the near close approaches. Long Parallels It is almost impossible to keep a well straight, so the situation of having two wells with long parallel vertical sections before very deep kick offs should be avoided. (Even if it were possible to maintain a straight well, the survey uncertainty will be g ow ng nd w h h sk of coll s on). Wh h s h pp ns h pl nn should nclud ‘nudg ’ to raise the inclination to around 5 degrees and return to vertical once enough separation had been achieved to compensate for the uncertainty at the deep kick off point.
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