Develop field with multilateral wells and RapidX junctions
Schlumberger recommended the use of horizontal, extended-reach
multilateral completions as a fit-for-purpose and economical solution.
Historically, multilateral completions drilled horizontally have been
considered high-risk and costly, particularly for wells with multiple zones,
but multilaterals have evolved over the years, becoming simpler, more reliable,
and less costly. Moreover, they produce a smaller footprint.
After assessing the formation architecture and the operator's
objectives, Schlumberger identified its RapidX TAML 5 interlocking-rail,
stackable multilateral junction as the most suitable. The junction is simple to
install and operate. It enables extended-reach completions to be run in
laterals independently of the junction, and it has a hydraulic seal that is
testable when installed. The highly unconsolidated reservoir made testing
critical—any sand produced through the junction could jeopardize the
subsea pumping system and production. Because the junction had to be sand
tight, the testable, hydraulically tight RapidX junction was deemed the best
choice.
The RapidX TAML 5 junction provides pressure isolation to 2,500 psi
[17,237 kPa] and formation stability at the casing windows. It connects the
lateral to the main bore through an interlocking system, stabilizing the milled
casing and preventing formation migration into the wellbore during pressure
isolation and production in multizone wells. The specially designed seal and
continually interlocking rail system create one of the strongest Level 5
junctions in the industry and therefore one of the most reliable. Reliability
was especially important because of the long projected life of the wells and
the complexity and risks of interventions in the subsea location.
