challenges in the oil & gas industry

Water treatment in the oil & gas industries covers a wide range of applications, such as:
  • Disposal or re-use of oily wastewater at refineries
  • Desalination of seawater for drinking water or process water
  • Disposal or re-use of produced water
  • Seawater injection
  • SAGD and boiler feed water
  • Low-salinity water injection and ion exchange
  • Cooling and process water
  • (C)EOR and IOR
  • Seawater sulfate removal (SRP)
  • Reverse osmosis (RO)

Handling water in the oil & gas industry is more than treatment alone: pumps, pipes, pressure vessels, instruments and controls are also needed to get a desired water quality.
The use of X-Flow nanofiltration (NF) and ultrafiltration (UF) membranes in the oil & gas industry requires extensive knowledge of end-user process conditions. This experience in process design, project document control, commissioning and startup services and a dedicated after-sales support, combined with a world class UF membrane manufacturing process, made X-Flow the market leader in seawater treatment. Among the largest desalination plants in the world, X-Flow has a market share of more than 40%.

Specifically for the oil & gas industry, X-Flow has innovative ultrafiltration membrane solutions to reduce footprint, chemical consumption and life cycle costs, which are increasingly important for offshore applications.

If you have any questions, please contact us.


Depending on the operating mode, UF is known for complete removal of all suspended solids and free/disperged/emulsified oil:

  • Permeate quality is <<1 mg/ltr TSS and <<1 mg/ltr free/disperged/emulsified oil

This makes X-Flow UF membrane technology very suitable for delivering the best feedwater quality to SRP, RO, (C)EOR, SAGD, NF and IX. 
X-Flow UF membranes are available in two different operating modes: 

Dead-end filtration
The dead-end operation mode is well-suited for (sea)water applications where the feed has an oil content of less than 5 mg/ltr and a Total Suspended Solilds (TSS) of less than 30-50 mg/ltr. Dead-end filtration is known for its reduced footprint and low energy consumption. 

Crossflow filtration
Crossflow operation is better suited for much higher TSS concentrations (<200 mg/ltr) in the feedwater combined with an oil content of less than 1000 mg/ltr. Crossflow filtration is known for its reduced chemical consumption and concentrating the oil fraction 10 to 20 times.

Two featured applications

Refinery cooling tower feed

Refinery cooling tower feed systems that use RO permeate for boiler feed and the softened RO concentration for cooling tower make up in order to optiize the water use efficiency of these processes.

Produced water advanced water treatment

Remove all remaining oil and solids after secondary produced water treatment in order for the effluent to be directly used in an EOR, SAGD or other production process application.
Rig and FPSO ion specific, chemical free, and low energy sulfate removing membrane barrier that optimizes the cost effective EOR reinjection process offshore.

treatment solutions

Several X-Flow membrane modules are used extensively in the oil & gas industry, including:
  • HFW1000 nanofiltration membrane modules, suitable  for color removal from water
  • HFS60 membrane module, used for silica removal for boiler feed protection
  • Aquaflex, with a vertical installation and dead-end filtration
  • Xiga, with a horizontal installation and dead-end filtration for a small footprint, suitable for non-saline applications
  • Seaflex, with a vertical installation and dead-end filtration, for seawater and saline applications
  • Seaguard, with a horizontal installation and dead-end filtration for a small footprint, suitable for seawater and saline applications
  • Compact series (27, 33 and 33V), Cross-Flow filtration, suitable for produced water and oily waste water
  • Racks and complete skidmounted / containerized solutions for easy and fast deployment on site

featured case

Daqing slider image

Heilongjiang province, China

Produced water

Pentair logo

As part of its separation into a new pure play water company, a new Pentair website has launched. Please visit the new to learn more about our exciting new company and your favorite brands!