Qugruk #2 Pad, on the Colville River Delta, approximately 18 miles northeast of Nuiqsut, Alaska (70.2719° N, 150.4451° W)
Repsol estimates that approximately 42,000 gallons (1,000 barrels) [update from Sitrep 1] of fresh-water-based drilling mud have been released to the gravel pad and adjacent snow-covered tundra. An unknown amount of gas has been released.
Repsol contractor Nabors Drilling was drilling an exploratory well when the drill penetrated a shallow gas pocket at a depth of 2,600 feet, resulting in a gas kick. The gas kick drove drilling mud used to lubricate and cool the drill out of the hole, onto the gravel pad and adjacent snow-covered tundra. Additional mud was pumped into the borehole in an attempt to kill the well, but that mud was also blown out.
Time/Date of Incident
Repsol reported the incident to ADEC at 10:29 AM on February 15, 2012.