Water treatment on Floating Production Storage & Offloading (FPSO) facility for offshore oil & gas project

Water treatment on Floating Production Storage & Offloading (FPSO) facility for offshore oil & gas project


The DMSE shipyard spans an area of 4.3 million m2 and encompasses the world's largest dock with a million-ton capacity.


  • Client

    Daewoo Ship & Marine Engineering (DMSE) for Inpex

  • Technology

    MMF / ACF / SWRO / BWRO with Remin, UV and NRMB

  • Location

    Offshore Western Australia (install in Korea)

  • Commissioned

    July 2017

  • Project Scale

    360 m3/day

Challenge  DSME, one of the world's leading shipbuilders and offshore contractors, were engaged by Inpex to design and build the massive Floating Production Storage and Offloading (FPSO) ship/facility for the Ichthys LNG project. Being permanently located remotely 250 km off the coast of Broome, Western Australia, FPSO must be self-sufficient in the production of both potable and process waters from the only source available, sea-water. Osmoflo was contracted by DSME to custom design and engineer the respective water treatment plant and deliver it to their Korean shipyard at the exact time so as to align with the FPSO’s vessel and topside construction. Being the fist project of this kind undertaken by Osmoflo,  particular challenges were experienced with difficult project specifications. This required a new approach and processes to our engineering and quality control activities.

Solution  Osmoflo supplied a duty/standby (2 x 180 m3/day RO permeate) water treatment plant comprising chem dosing, multimedia filtration with automated self-cleaning backwash strainers, 5um and activated carbon cartridge filtration, followed by seawater and brackish reverse osmosis, and calcite remineralisation. The plant is also equipped with a UV steriliser, and an NRMB polisher providing the capability to produce service, potable and demin quality waters as required for FPSO’s personnel and processes.

The plant, designed and built in Adelaide South Australia, was exported to DSME’s shipyard in South Korea where it was installed and commissioned inside the FPSO vessel with supervisory assistance provided by Osmoflo Project and Commissioning Engineers. The FPSO, under its own propulsion, then sailed to its final location offshore from WA, where it will be operating for the 40 year life of the Ichthys LNG project. During the sailing an Osmoflo Commissioning Engineer was present on board to provide operating assistance and training of Inpex’s personnel in the operation and maintenance of the water treatment plant.

Result  A bespoke engineered plant was delivered that met requirements and strict Oil & Gas specifications . It has minimal footprint, height and weight, and was delivered in line with a challenging and critically important schedule. New internal engineering, procurement and quality control processes were developed and implemented at Osmoflo for the benefit of this and similar future projects.