Proximity (anti-collision) analysis
On multi-well projects (particularly offshore) there are small distances
between slots. To eliminate the risk of collisions directly beneath the
platform, the proposed well path is compared to existing and other
proposed wells. The distances between the other wells and the proposal are
calculated at frequent intervals in critical sections. These calculations can
be performed using the EC*TRAK software (BHI) or COMPASS.
Survey uncertainty must also be computed for both the proposed well and
the existing wells. All major operating companies have established criteria
for the minimum acceptable separation of wells, which are usually linked
to “cone of error” or “ellipse of uncertainty” calculations.
On multi-well projects (particularly offshore) there are small distances
between slots. To eliminate the risk of collisions directly beneath the
platform, the proposed well path is compared to existing and other
proposed wells. The distances between the other wells and the proposal are
calculated at frequent intervals in critical sections. These calculations can
be performed using the EC*TRAK software (BHI) or COMPASS.
Survey uncertainty must also be computed for both the proposed well and
the existing wells. All major operating companies have established criteria
for the minimum acceptable separation of wells, which are usually linked
to “cone of error” or “ellipse of uncertainty” calculations.
