PRODUCED WATER TREATMENT

MONTNEY REGION CASE STUDY

PROBLEM

  • Underperforming oil removal filter system
  • High TSS, oil content, iron & bacteria, leading to high OPEX costs for chemical treatment
  • ESG pressures and fresh water scarcity and sustainability

PROJECT SPECIFICS

  • Average treatment volume: 150 to 750 bbl/d
  • Project duration – 4 months
  • System configuration, Pre-Treatment + Swirltex UF System

PROJECT GOALS

  1. Chemical treatment and ultra filtration of oilfield produced water, primarily for solids, iron, and oil removal.
  2. Membrane permeate flux production > 100 LMH.
  3. SS <50mg/L, Oil <15mg/L, Iron <10mg/L, Bacteria<15 pg/mL.

OUTCOME

Successful removal efficiency of primary constituents to the point where the produced water now meets quality specifications for reuse in hydraulic fracturing operations. Additionally, reduced environmental footprint (lower greenhouse gas emissions due to reduction in disposal trucks; use of Swirltex permeate can possibly increase well life; less contaminants being disposed into the environment).

BUSINESS VALUE AND FULL SCALE SYSTEM

  • Elimination of 20,000km per day with the reduction of 140 trucks per day and of travel associated. Water that can now be re-used rather than disposed, equating to a GHG reduction of approximately 8,000 tonnes of CO2e/yr
  • Significant down hole disposal saving and reduced impact on seismic activity concerns
  • Chemical cost reduction and OPEX savings of $60-$100K per well pad
  • Savings on pond cleanup, dredging and de-sludging cost ($1M annually)
  • Significant down hole disposal saving and reduced impact on seismic activity concerns
  • Chemical cost reduction and OPEX savings of $60-$100K per well pad
  • Savings on pond cleanup, dredging and de-sludging cost ($1M annually)
  • Well production increase with clean saline water vs fresh water
    Up to a 75% reduction in freshwater consumption, thus saving an average of 357,000 m3 of fresh water per year
  • Industry leading, sustainable energy resource producer, ESG impact with sustainability goals.
  • Full scale Swirltex system installation Q2/Q3 2022, 20,000 bbl/d (3,000 m3/day)

METHODS AND MATERIAL - CHEMICAL PRE-TREATMENT

A chemical treatment step prior to membrane ultra filtration is conducted to assist in the removal of solids and other contaminants in efforts to prevent membrane fouling and increase permeate production rate. Standard jar testing was performed until a chemical treatment package was optimized for the application; a 4-gallon sample was then prepared with newly optimized chemical dosages, mixed, and decanted.

MEMBRANE FILTRATION

The decanted/treated sample is then fed through Swirltex’s proprietary ultra filtration technology for further purification of the sample. Swirltex then operates under their standard process parameters that have been carefully fine tuned to minimize energy consumption while increasing permeate flux. Flux is collected in 10-minute intervals for 1 to 3 hours, depending on client requirements. Permeate is collected and sent for analysis at a third-party laboratory to ensure quality specs are met.

CONCLUSION

Oil producers face challenges in removing TSS, iron, and oil, however, the Swirltex system shows exemplary results with minimal of 97% efficiency rate. The Swirltex technology help soil and gas companies reclaim wastewater and accomplish their sustainability objectives. With low energy consumption and operational costs, the Swirltex system exceeds expectations in the wastewater solutions industry.