Implementation of Subsea Multiphase Pumps on the Jack & St. Malo Project
Date & Time
Wednesday, March 1, 2023, 10:30 AM - 11:00 AM
Scott Stjernstrom

This paper will present an overview of the multiphase pump system on Chevron’s Jack & St. Malo (JSM) project, how its configuration evolved over time, and the opportunities and obstacles that were encountered during execution. Subsea boosting has always been a key method for enhancing recovery on JSM starting with subsea single-phase pumps being installed as part of JSM Stage 1 in 2014, and with plans to subsequently install subsea multiphase pumps in a future stage. Multiphase pumps for JSM were installed in mid 2021 and early 2022. But the path for implementing the multiphase pumps was very different from what was originally envisioned when the JSM project started. Advances in pump technology provided new options for configuring the pump system such that the initial configuration with two subsea pumps in series became a one for one pump replacement. An existing interface on the Stage 1 pump station was then re-purposed to accommodate additional equipment needed for the multiphase system. And rather than procuring new topsides power system equipment, upgrades were made to the Stage 1 power system. As a result of these and other enhancements, the multiphase pump system currently in operation at JSM is less complex, entailed less risk, and was executed at a significantly lower cost than the system originally planned by the project.

Location Name
Moody Ballroom