• Pilot 2

    Injection of low salinity water into reservoirs has in many cases shown an significant increase in recovery factor of oil in place in the reservoir. The removal of sulphate ions from injected water is sometimes required to prevent scaling and provide added protection against reservoir souring. Production of Low Salinity Water and/or Sulphate removal processes require the use of spiral wound Nano or RO membranes. Such equipment has proven expensive and difficult to accommodate and operate on an offshore topside facility.

    This second pilot demonstrated that subsea water treatment as performed by the Seabox™ unit in combination with membranes can be designed as a system that will provide significantly increased membrane lifetime and reduced need for maintenance and intervention. At the same time, Seabox™ has proved itself to be a reliable seabed piece of equipment that can function for several years without requiring any intervention.

    This second Joint Industry Project (JIP) Pilot testing ran for 9 months in total. It enabled investigation of several treatment train combinations of Seabox™ unit, pre-filtration and RO / Nano filtration membranes. The test results have given clear indication of optimal equipment selection and method of operation that will enable a robust and reliable subsea membrane treatment system to be deployed on the seabed.

    Funded by several E&P companies and the Norwegian Research Council DEMO 2000, the pilot test was finalized during the first half of 2013 with results exceeding expectations.

    Description

    Membrane skid