BHP has spudded its second operated appraisal well at the Trion field off Mexico in the deep-water Perdido fold-belt area.
The Australian operator began drilling operations at the Trion 3-DEL well on 9 July with the drillship Deepwater Invictus, the company confirmed to Upstream.
"This appraisal well is expected to provide further information regarding rock and fluid properties near the crest of the field as well as information to support future development well planning," a spokeswoman said.