ISO 23333:2025 PDF

Overview

ISO 23333:2025 - Natural gas - Upstream area - Requirements and testing of slick water is an international standard that defines performance, sampling, testing, inspection and documentation for slick water fracturing fluids used in hydraulic fracturing for shale gas. It provides harmonized technical criteria to support producers, suppliers, service companies, testing laboratories and regulators in ensuring consistent quality and safe use of slick water in upstream natural gas operations.

Key Topics and Requirements

The standard sets clear, testable requirements and references established test methods:

• Scope: Applicable to fracturing fluid systems used in hydraulic fracturing operations in shale gas.
• Performance limits:
  • pH: 6.0 to 9.0.
  • Residue content: ≤ 150 mg/l.
  • Drag reduction: ≥ 60% (measured per ISO 7055).
  • Dissolution time: additives dissolve within 40 s.
  • Kinematic viscosity: