Produced water is the largest by-product of oil and gas production. Around the world, the response is shifting from disposal toward treatment, reuse, and recovery of minerals, but the pace, the rules, and the end uses differ sharply by region.

NORTH AMERICA

  • The Permian alone generates more than 20 million b/d of produced water, and roughly half or more is recycled for fracturing.
  • Texas moved land-application permitting to TCEQ, which proposed rules in April 2026 (adoption targeted 2027) while reviewing at least five Pecos watershed discharge applications.
  • New Mexico’s water commission voted in May 2026 to reopen off-oilfield reuse.

Mineral recovery is moving from lab to field: Element3 targeted first Permian lithium in 2026, and Houston’s Altillion raised $5 million to extract iodine, lithium, and copper from produced water.

SOUTH AMERICA

  • Argentina’s Neuquén province made reuse, recovery, and recirculation of water in Vaca Muerta a priority public policy through Decree 792/2026 and updated its water-use fee.
  • The province is exploring treated produced water for drip irrigation, and the Produced Water Society holds its first Latin American congress in Neuquén on Oct 15–16, 2026.

In Colombia, Ecopetrol managed 486 million m³ of produced water in 2024, reinjected 84% of it, and used 4.6 million m³ to irrigate forest crops at the Castilla and Rubiales fields.

MIDDLE EAST

  • Oman’s PDO handles on the order of one million m³ of produced water per day and has sought advisers on reuse to cut emissions and create value.
  • Its Nimr Water Treatment Plant, run by Bauer Nimr, uses reed-bed wetlands to treat roughly 115,000 m³/day, one of the world’s largest constructed wetlands for oily water.

At Qarn Alam, a contract with Minerals Development Oman aims to desalinate hypersaline produced water and recover salts and minerals.

EUROPE

  • North Sea discharges are governed by OSPAR, with a 30 mg/L dispersed-oil standard and a risk-based approach to the full chemical mixture.
  • About 300 million m³ a year is discharged in the OSPAR area, roughly 130 million from Norway, which has pursued “zero harmful discharge” since the late 1990s; reinjection is considered best practice.

U.K. North Sea brines reach about 40–55 ppm lithium, near the ~50 ppm benchmark cited for direct lithium extraction.

AFRICA

  • Upstream investment is forecast at $41 billion in 2026, with output near 11.4 million b/d, so produced-water volumes will grow.
  • Discharge limits vary: Nigeria sets 40 mg/L monthly (72 mg/L daily) oil-in-water, and Egypt 15 mg/L.
  • Studies in the Niger Delta found treatment systems that miss many contaminant families, pointing to a need for integrated treatment.

Algeria’s 2025 circular-economy law (Law 25-02) requires industrial operators to plan for producing reusable water.

ASIA-PACIFIC

  • Queensland’s coal seam gas industry treats brackish water by reverse osmosis under a beneficial-use policy; a 2023–2033 brine action plan tackles brine stored in 36 ponds.
  • The QCLNG operation targets 97% beneficial-use recovery, and managed aquifer recharge with treated water has been studied.

In China, Sinopec completed a July 2026 pilot producing lithium carbonate from Yuanba gas field produced water, claiming costs more than 35% lower than conventional routes.

Sources: Beatty & Wozniak · Davis Graham · Energy Capital HTX · Diario Río Negro · Vaca Muerta Online · iProfesional · Ecopetrol · Zawya (PDO) · Decypha (Nimr) · Zawya (Qarn Alam) · Norwegian Petroleum · Marine Env. Research review · SPE 215585 · African Energy Chamber · Energies (2025) · Phys.org (Niger Delta) · EcoMENA (Algeria) · CSIRO GISERA · WEF (QCLNG) · Argus (Sinopec).