Mexico’s largely frontier Salina del Istmo basin is shaping up as a hotbed of interest before the country’s first deep-water bid round later this year, according to a top oil regulator.

The country’s National Hydrocarbons Commission (CNH) will offer six blocks in the play off the states of Tabasco and Campeche. The area has traditionally been considered gas-prone but is increasingly intriguing explorers, with potential for liquids below a dense salt layer.

However,