Sulphate Removal Units
The SRU uses nano-filtration membranes to remove the sulphates while leaving the other salts (sodium, chloride etc.) substantially unaffected, thus maintaining the stability and permeability of the formation clays.
Benefits of sulphate removal:
✓ Reduces seawater ion concentration from around 2,500 ppm to less than 50 ppm at temperatures of < 24ºC)
✓ Assists in maintaining reservoir permeability by limiting formation plugging caused by scaling
✓ Prevents well souring by controlling sulphate reducing bacteria (SRB) which in turn reduces equipment corrosion problems and the equipment required for scrubbing, removal, and handling of hydrogen sulphide
✓ Has an additional safety benefit by reducing scale and thus the potential of naturally occurring radioactive material which can be attached to the scale
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The objective of this process is to remove coarse suspended solids that could deposit on process equipment creating scale and corrosion site.
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The UltraMEV combines multiple ultrafiltration elements in a single housing reducing footprint, weight and need for interconnecting pipework.
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The nanofiltration membranes are specifically designed to remove sulphate ions from seawater used for water injection.
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Chemical storage, dosing and injection system for the chemicals required to operate the SRP
