Technology Qualification of Liqui-Cel® Membrane Contactors for Deoxygenation of Low Salinity Water for Polymer Flooding

Polymer flooding using low salinity water has been shown to improve oil reservoir recovery rates by altering the reservoir characteristic from an oil-wet state to a water-wet state. It has also been shown to be cost competitive with other enhanced oil recovery (EOR) processes. The combined cost savings and increased recovery rate have prompted a lot of attention in the polymer flooding process with low salinity water in recent years.

However, as with any offshore water flooding process, dissolved oxygen in the injection water may cause unwanted effects to the reservoir, such as souring and bacteria growth. Therefore, it is common practice to remove oxygen from water before injection. In cases where polymers are added, oxygen removal is critical to prevent a reduction in the polymer's effectiveness.

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