JPT Multilateral/Extended-Reach Wells

SPE.org 

The development of multilateral wells and long-reach wells has become important to maximizing recovery for many fields. These technologies are often applied in offshore environments, where large reservoir areas are drained from one or more platforms. In the late 1980s, long-reach wells started to use existing infrastructure better by drilling beyond the design limits of that time. Several major operators were extending their limits, and, in the late 1990s, BP Wytch Farm showed that a horizontal departure exceeding 10 km was feasible. This had a significant effect on the industry because offshore platforms now could be designed for up to 10-km reach, as opposed to the early 1980s when 3-km reach was common.