Treating seawater on the seabed for injection into reservoirs will deliver a new and significant capability to the industry's expanding subsea toolkit. This paper will describe the latest developments in the Subsea Water Intake & Treatment (SWIT) system and its ability for long lasting production on the seabed of ‘tailor made’ water for any IOR & EOR application.
In addition to ‘normal’ waterflooding, adding membrane treatment can adjust the chemical composition of injection water to suit specific demands of any reservoir. The injection of low salinity water in many reservoirs has shown significant increases in recovery factor of the oil in place, whereas removal of sulphate ions from injected seawater will prevent scaling and provide the ultimate protection against reservoir souring.
Free from all topsides restrictions, this technology enables new levels of flexibility in reservoir drainage strategy. Reservoir engineers will have the ability to significantly increase recoverable reserves and production rates in a cost effective and environmentally friendly manner.