Survey Programme 1.0 Reasons for Directional Surveys
Surveys are taken to better define the position of the wellbore, generally relative to the surface location. The reasons for wanting this information include:a. Directional Control: To ensure the wellbore will reach its target.b. Well control: provide information for drilling relief wells.c. Reservoir development/exploitation: accurate description of the well’s position in the reservoir.d. Unitisation issues: As for b. where a field is unitised between several operators.e. Future sidetracks or adjacent wells: required for planning purposes to reach a target or . . .