The use of low salinity water in Enhanced Oil Recovery processes has been a recent topic of discussion. The potential to increase recovery rates by altering the reservoir characteristic from an oil-wet to a water-wet state, along with potential cost savings, has garnered attention in recent years.
However, as with any offshore water flooding process, dissolved oxygen in the injection water may cause unwanted effects in the reservoir, such as souring and bacterial growth. Therefore, it is common practice to remove oxygen from water before injection. In cases where polymers are added before injection, removing oxygen is crucial for preventing a reduction in the polymer’s effectiveness.