Sulfate Removal Systems

• The SRS process is based on nanofiltration technology that selectively removes the sulfate (SO₄) ion from seawater, while allowing the chloride (Cl) ion to pass through unfiltered, maintaining stability of reservoir formation clays.
• SRS is generally placed between the deaeration process and water injection pumps, taking advantage of reduced corrosion aspects of deaerated water and allowing the use of less exotic piping materials in the high-pressure control loops, and eliminating the need for booster pumps.
• Typical reduction of seawater sulfate ion concentration from 2,750 ppm to less than 45 ppm.
• Custom-engineered systems are built to comply with demanding offshore environmental requirements, industry specifications and specific customer standards for operational integrity and compliance with prevailing safety requirements.
  

Following pretreatment with filtration and deaeration for particulate and oxygen removal, our sulfate removal system removes a minimum of 98.5 percent of the sulfate ions in the injection seawater.

Therefore,

• protecting the well bore and tubulars from plugging with barium and strontium scale,
• providing greater protection and less operational headaches and uncertainties than injection of scale inhibitor (squeeze treatment) and acidizing operations,
• removing the food source for thermophylic bacteria, known as SRB, which can  otherwise grow and multiply, resulting in well souring,
• preventing potential problems of well workovers, production downtime or lost wells.
  

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