VWS Westgarth


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Sulphate Removal Packages, Water Injection and Treatment Systems

Orbital House, 3 Redwood Crescent,
Peel Park, East Kilbride, Glasgow,
G74 5PR,
United Kingdom
Fax Number

VWS Westgarth specialises in the turnkey design and build of water treatment plants for upstream oil and gas markets. We are the world leader in seawater sulphate removal packages (SRP), and also supply complete produced water treatment and wash water systems on a global basis.

A blue chip client base coupled with extensive experience of offshore engineering standards and requirements means that VWS Westgarth is very well placed to continue to develop and install market leading solutions. VWS Westgarth is a member of the VWS Oil & Gas group within Veolia Water Solutions & Technologies (VWS), the world’s largest water treatment company.

Water injection systems

Water injection is the action of injecting water into a reservoir to maintain pressure and encourage hydrocarbons to the producing well. In many situations, the most convenient fluid for injection is the produced water from the well. Injection is also a convenient method of produced water disposal. In an offshore environment, seawater is often the preferred source of injection water.

The quality of the water for injection, from whatever source, will be required to be of a standard that will not cause problems such as plugging and/or scaling of the injection equipment. This is an important issue, especially offshore, where drilling a new well is extremely expensive.

VWS Westgarth, an upstream water treatment specialist and a member of the VWS oil and gas division of Veolia Water Solutions & Technologies, has over 130 employees based at its head office, Orbital House.
Encana Buzzard sulphate removal system (251,700 BPD): the world’s first membrane prefiltration - single lift module (900te dry weight).
Agip Tiffany (100,000 BPD) SRP: first commercial installation of SR membrane technology.
The Cophase™ compact flotation unit (CFU) operates by combining the well-established principles of gas flotation, oil droplet coalescence and centrifugal separation into a single process step.
Available as retrofits for existing installations or integrated into a complete produced water system, the STREAMLINER™ deoiling hydrocyclone offers an unbeatable combination of economy and whole life support from the water treatment expert in upstream oil and gas.

In addition, because a reservoir is effectively sterile, injecting water containing oxygen and bacteria can cause ‘souring’ of the reservoir. A ‘sour’ reservoir is one where there is the presence of hydrogen sulphide (H2S) in the hydrocarbons. Souring reduces the value of the produced hydrocarbons and requires expensive production equipment and materials to cope with the aggressive nature of the produced fluids. Typical contaminants that need to be removed from injection water are:

  • Hydrocarbons
  • Solids
  • Scaling compounds such as sulphate
  • Sulphate reducing bacteria

Sulphate removal systems

Sulphate removal systems work through the injection of water into the reservoir to enhance oil recovery (EOR) by maintaining the reservoir pressure and to sweep displaced oil towards the production wells. Sea water typically contains 2,650mg/l of sulphate ions. Formation water in the reservoir will contain barium from a norm of 200mg/l to a high of 2,500mg/l. This barium will react with the injected sea water sulphate ions causing barium sulphate scale.

The industry recognised solution is to remove sulphate from sea water before injection; this also helps prevent well souring by controlling sulphate reducing bacteria (SRB). The "Sulphate Removal Process" was developed and patented by Marathon Oil/Dow in the late 1980s, and the technology design granted to global sub-licensees.

Produced water treatment systems

Produced water is any water that is ‘produced’ to the surface from an oil or gas reservoir along with the oil and gas. The contaminants need to be removed to enable the produced water to be re-used or disposed of. There are a number of options available for the disposal or reuse of produced water, each of which will have different water treatment criteria associated with it:

  • Surface disposal into the sea, watercourse or into evaporation ponds, subject to local environmental regulations
  • Injection into a disposal well, either a watered out part of the reservoir or to a disposal formation
  • Reinjection for pressure maintenance, replacing sea/aquifer/river water as the source of water injection
  • Reuse for irrigation or as industrial process water

Water treatment system turnkey package

VWS Westgarth engineers, procures and project manages the complete produced water treatment system including:

  • Oil/water plate separators
  • STREAMLINER™ de-oiling hydrocyclones
  • De-sanding hydrocyclones
  • Degassing plant
  • Cophase™ compact flotation units (CFU)
  • Macro porous polymer extraction (MPPE)
  • Dual-media filters
  • Ultrafiltration with ceramic membranes
  • Membrane sulphate removal
  • System healthcare

White Papers

Press Releases

  • VWS Westgarth Awarded Contract for FPSO in Baleia Azul Field

    VWS Westgarth, part of Veolia Water Solutions & Technologies, has been awarded a multi-million dollar contract by SBM Atlantia for their FPSO to be installed in the Baleia Azul field, Campos Basin, offshore Espirito Santo state, Brazil. The award is for the design, supply and deliv

  • Veolia Water Awarded Contract for Petrobras P63 Project

    Veolia Water, through its subsidiary Veolia Water Solutions & Technologies (VWS), has won a contract for the water treatment package of the Petrobras Papa Terra P63 project (offshore oil production) in the Campos Basin, offshore Brazil. The design-build contract has been awarded by

  • Veolia Water Solutions & Technologies Awarded Contract Offshore Brazil

    A joint venture of the sister companies VWS Westgarth and VWS Brazil of Veolia Water Solutions & Technologies has been awarded a contract by MODEC for a project development offshore Brazil. The award is for the supply of a sea water treatment package as a completed single-lift module, compris

  • Visit from French Foreign Trade Minister Puts Spotlight on VWS Oil & Gas

    VWS Oil & Gas, a division of Veolia Water Solutions & Technologies, was visited by the French Foreign Trade Minister at the recent Offshore Technology Conference in Houston, Texas. Mme Anne Marie IDRAC, the French Minister of State for Foreign Trade attended the Offshore Techno

  • VWS Westgarth Delivers Pazflor Module

    VWS Westgarth has delivered the first process package of their sulphate removal (SRP) water treatment system for the Total Block 17 Angola FPSO Pazflor. The membrane pre-filtration module was built in the Dyna-Mac fabrication yard in Singapore. This technology-leading system is the com

  • VWS Westgarth Releases Free White Paper

    VSW Westgarth has released a free new white paper about its upstream oil and gas water treatment solutions. With over 110 years of designing and building water treatment and desalination plants, VWS Westgarth has an impressive track record of water treatment processes and has the ability to utili

  • VWS Westgarth Is Awarded the Contract for PSVM FPSO, Angola

    VWS Westgarth, part of Veolia Water Solutions and Technologies, has been awarded a multi-million dollar contract by MODEC Offshore Production Systems for their PSVM FPSO project for the BP Angola PSVM (Plutão, Saturno, Vênus and Marte) field development in Block 31 Angola. The award is

  • VWS Oil and Gas Launches Streamliner Deoiling Hydrocyclone

    VWS oil and gas, the oil and gas industry water treatment specialist division of Veolia Water Solutions and Technologies, has recently launched the STREAMLINER range of deoiling hydrocyclones for produced water treatment. Many years of produced water system design, build and service exp

  • VWS Westgarth Announce Opening of Luanda Office

    VWS Westgarth Ltd, a world leader in the supply of upstream water treatment solutions to the worldwide oil and gas industry, is pleased to announce the opening of a new office in Luanda, Angola. This new office builds upon the company’s recent successes in capturing a substantial proportion of th

  • Veolia Water Wins Major Contract in Oil & Gas Sector in Brazil

    Veolia Water announces that its subsidiary, Veolia Water Solutions & Technologies (VWS), has been awarded a major contract by FSTP Private Limited for the Petrobras P56 deep water oil development in the Marlim Sul field in the Campos basin, offshore Brazil. The contract, worth around US$40 m

  • VWS Westgarth Awarded Oil Development Contract by Total E&P Angola

    VWS Westgarth, part of Veolia Water Solutions and Technologies has been awarded a contract by Total E&P Angola in excess of US$25m for their Pazflor oil development in Block 17 deep offshore Angola. The award is for the supply of a Sulphate Reduction Process (SRP) package of capacit

  • VWS Westgarth is Awarded the Contract for FPSO Espirito Santo

    VWS Westgarth, part of Veolia Water Solutions and Technologies has been awarded a multi-million dollar contract by Single Buoy Moorings Inc. (SBM) for their FPSO Espirito Santo project for the Shell BC-10 field development for location deepwater offshore Brazil. The award is for the sup

  • VWS Westgarth is Awarded the Contract for FPSO Mondo and FPSO Saxi Batuque

    VWS Westgarth, part of Veolia Water Solutions and Technologies has been awarded two multi-million dollar contracts by the IHC Gusto / Single Buoy Moorings (SBM) partnership on their FPSO Mondo and FPSO Saxi Batuque projects for the Exxon-Mobil Kizomba C development in Block 15 Angola. T

VWS Westgarth Ltd
Orbital House, 3 Redwood Crescent
Peel Park, East Kilbride, Glasgow
G74 5PR
United Kingdom

Fax Number