Regulators in Mexico have approved plans by Australian operator BHP to drill its second appraisal well at the Trion field in the deep waters of the Perdido fold-belt area, writes Kathrine Schmidt.

Drilling of the Trion-3DEL well is set to start on 7 July and run through 25 July, with completion planned from 26 July to 10 August, according to a presentation made before Mexico's National Hydrocarbons Commission (CNH), which issued approval for the probe.