Eliminate NPT in two sections and reach desired footage
Closely integrated teams of Schlumberger drilling engineers and
geomechanics experts collaborated with Shell experts to overcome the technical
challenges preventing past success. Schlumberger was involved in the
directional drilling of the most challenging 9 1/2-in and 6 1/2-in sections
over a drilling cycle of 19.1 d, including a break for casing. The total
footage drilled in these two sections was 1,854 m [6,083 ft] with zero NPT.
The subject well was drilled in 24.2 d with a total footage of 3,667 m
[12,031 ft]. In contrast, the best offset well in the block took 50.8 d to
drill and reached only 3,491 m [11,453 ft]. This 52% reduction in drilling time
was coupled with a DLS of more than 3.5°, which surpassed the targeted DLS
of 2.5°. Based on cost-per-meter, the well ranks in Shell's top quartile
and is considered best in class by the operator.