Operator Saves More Than USD 1 Billion in Field Development Costs by Using Multilaterals

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.