Produced water

Produced water is the water that is produced with the crude oil when the oil production is occurring. The water content in the oil pumped from the wells varies between different reservoirs, but the quantity is huge (may be up to more than 90 per cent). Because of the huge volume of the produced water, produced water treatment is a big issue for oilfields.

Due to more and more strict environmental regulations, the quality of treated produced water is required to be better and better. Solids in the water is easy to be removed. Organic removal is not popularly required yet even though some oilfields are doing it now. The main target is to remove oil. The content of oil in water(OIW) is required to be from 40 ppm to 5 ppm and even less in different countries and areas.