MULTISTAGE FILTRATING PRE-TREATMENT FOR DESALINATION OF OILFIELD PRODUCED WATER

摘要

A method and system for treating oilfield produced water is disclosed. The method includes passing oilfield produced water through a chain of filters, first filter configured to filter particles of a size larger than 10 μm from the water, a second filter configured to filter remaining particles of a size larger than 2 μm from the water and a third filter configured to filter remaining particles of a size larger than 0.5 μm from the water and automatically cleaning at least one of the filters.

主权项

1. A method of treating oilfield produced water, the method comprising:
passing the oilfield produced water through a chain of filters, the chain comprising a first filter configured to filter particles of a size larger than 10 μm from the water, a second filter configured to filter remaining particles of a size larger than 2 μm from the water and a third filter configured to filter remaining particles of a size larger than 0.5 μm from the water; automatically cleaning the first filter when a first pressure drop related to the first filter is above a first threshold value; and automatically cleaning the second filter when a pressure drop related to the second filter is above a second threshold value.