What happened

During flushing of a disconnected 2.8 km subsea flowline in the decommissioned Griffin field, observers saw a black substance discharge from the outlet and a light sheen form at the surface. The unexpected fluid may have included produced water, residual hydrocarbons, degraded production chemicals and scale. A tracking buoy was deployed. NOPSEMA's public report did not quantify the release, so no volume is inferred; the marker is approximate.

When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.