RapidConnect Junction, Indonesia
In January 2002, China National Offshore Operating Company (CNOOC), formerly Repsol YPF, completed the first multilateral well of the East Rama field in the Java Sea, Indonesia, using a RapidConnect system.[note 2]

Each lateral branch of  Well AC-06 targeted two pay zones. The 7-in. primary casing string included a primary and a backup ICC.

The lower 6-in. lateral was drilled and completed with a liner with a 4-in. Weatherford expandable sand screen (ESS) and expandable isolation sleeve (EIS) assembly and 41⁄2-in. blank pipe below a 7-in. liner packer.
 
The upper 6-in. lateral was drilled and completed with a 4-in. ESS and EIS assembly, 4 1⁄2-in. blank pipe and 4 1⁄2-in. TAM International external casing packer (ECP). A RapidConnect system installed on a tieback liner connected the upper lateral completion assembly with the main wellbore.

An electrical submersible pump set in the 9 5⁄8-in. casing finalized the completion. Production from the laterals was commingled at a stabilized oil rate of 874 m/d [5500 B/D] and 128,864 m/d [4.5 MMcf/D] of gas

Well AC-06 produces three to four times more oil than the best conventional wells in this field and also had the highest productivity—32 B/D/psi [0.74 m/d/kPa].The AC-02 and AC-03 single-bore wells produced at 7 and 12 B/D/psi [0.16 and 0.28 md/kPa], respectively.

The AC-06 well was completed in a record 36 days—demonstrating that multilateral technology is cost-effective for developing satellite fields and bypassed reserves.


 
2. Caretta F, Drablier D and O’Rourke T: “Southeast Asia’s First Multilateral with Expandable Sand Screens,” Offshore Engineer (April 2002): 55–56.

Tanjung E, Saridjo R, Provance SM, Brown P and O’Rourke T: “Application of Multilateral Technology in Drilling an Offshore Well, Indonesia,” paper SPE 77829, presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, Melbourne, Australia, October 8–10, 2002.