Mexico is “evaluating” its $11.1 billion onshore Chicontepec oil project after production failed to meet targets, Energy Minister Georgina Kessel said.

Chicontepec: which stretches across Mexico’s Puebla and Veracruz states, will produce 60,000 barrels a day by the end of the year, down from a previous forecast of 72,000, according to Pemex. The company is being “too optimistic” about the field, board member Fluvio Ruiz said in a May interview.

Pemex Chief Executive Officer Jesus Reyes Heroles has said the company needs to drill 1,500 wells a year at the field to meet its production goals. Mexico is counting on Chicontepec to help offset output declines at fields such as Cantarell.