Clariant HYTREAT ECO — OSPAR‑compliant low‑dosage anti‑agglomerant for North Sea
- First LDHI anti‑agglomerant to meet OSPAR environmental requirements for North Sea operations.
- Field dosing ranged from less than 1% to 2% by volume on water, about an order of magnitude lower than methanol or MEG.
- Proven in Norway and UK offshore trials, handling high water cut, deepwater conditions and riser subcooling up to 25°C at 130 barg.
- Awarded Technology Readiness Level TRL7 after a Norway trial that enabled a 24‑hour shut‑in well restart and met overboard discharge limits.
Technology
HYTREAT ECO is an anti‑agglomerant low‑dosage hydrate inhibitor (LDHI‑AA) that keeps hydrate particles dispersed and flowing through production systems. It delivers reliable flow assurance at dosages reported in the field trials of less than 1% to 2% by volume on water, substantially lower than conventional methanol or monoethylene glycol (MEG) programs, and is fully compliant with OSPAR environmental requirements for the North Sea.
Field performance
The technology was deployed offshore in both Norway and the United Kingdom. In Norway it supported a mature asset by managing rising water production, reducing reliance on glycol regeneration capacity, enabling a successful well restart after a 24‑hour shut‑in within the hydrate stability zone, and maintaining produced water quality within overboard discharge limits. These results led to a TRL7 rating. In the UK it replaced subsea methanol injection in a gas condensate field operating under extreme subcooling, with riser shut‑in subcooling reaching up to 25°C at pressures of 130 barg, and provided effective control during normal operations and cold restarts.
Operational and environmental benefits
Lower dosing reduces chemical consumption, offshore logistics, storage and handling demands, and is expected to lower emissions associated with chemical transport and deployment, offering a smaller operational footprint for hydrate management in deepwater operations.
Source: Clariant
