Produced Water Treatment Solutions for SAGD

AutoFlot™ IGF and Power Clean™ ORF

VWS Oil & Gas provides highly effective deoiling systems for produced water. This includes mechanical induced gas flotation (IGF) and walnut shell oil removal filter (ORF) technology.

The AutoFlot™ IGF, coupled with Power Clean™ walnut shell ORF systems, provides a process train that effectively reduces free oil and solids by 90-95% with maximum inlet concentrations of 200 mg/l of free oil and less than 100 mg/l of total suspended solids.

High-quality Distillate with Silica Removal

Evaporation is a robust and effective method of treating de-oiled produced water in SAGD production. Thermal processes provides high-quality distillate for steam generation with the flexibility to work with either OTSGs or industrial water tube boilers.

VWS Oil & Gas has developed an innovation to address the issues concerning silica removal, scaling of heat transfer surfaces, and addressess the resulting diificulty in disposal of concentrated waste brines experienced in conventional evaporation processes.

The Silica Sorption Process™ provides a method of managing the silica and other constituents in deoiled produced water that provides several benefits:

• Removal of silica in produced water without elevated pH levels
• Waste brines containing silica and other scaling components provide flexible on-site or off-site disposal if ZLD is not desired
• Significant reduction of caustic consumption
• The addition of the proprietary Vapor Washer system produces a high-quality distillate, suitable for boiler feedwater

The process also tolerates high-hardness, high-salinity produced water containing calcium and magnesium as these constituants are also sorbed to prevent the scaling experienced in conventional systems. This is especially important as expected mandates to use brackish makeup water become more common with expansion of the oilsands.