The two-leg multilateral well was drilled and completed from the NE Intan A platform in about 23m of water.
"The seamless integration of all products, services and expertise required to engineer, procure and deploy such a complex completion was a key factor in the award of the work to Schlumberger," CNOOC technical exploration manager Doug Park said.
Schlumberger used its RapidSeal multilateral system to execute the project.
A Schlumberger (Reda) electrical submersible pump to optimise oil flow from the wellbore, two downhole flow control valves to minimise water influx and selectively control the flow from either leg, downhole well sensors that provide real time temperature and pressure readings from both legs of the well, were used in the completion of the project.
"This project is a significant milestone in the fast developing area of multilateral and intelligent completion technology," Schlumberger Oilfield Services Indonesia, general manager Carlos Calad.