Murphy Oil is drilling ahead at its King Cake well in the Atwater Valley area of the US Gulf of Mexico, a key test in an area seeing renewed interest in deep-water exploration.

The US player confirmed to Upstream it spudded the probe last month. The well is located in Atwater Valley Block 23. Work is being carried out by Transocean drillship Deepwater Asgard in 5381 feet of water, according to Bureau of Safety & Environmental Enforcement records.