MEXICO CITY, Oct 28 (Reuters) - Grupo Carso is reviewing

the feasibility of the Lakach deepwater natural gas project in

collaboration with state energy company Pemex and conducting new

analyses to determine how to proceed, a company official said

Tuesday.

Pemex and firms that form part of the empire of Mexican

billionaire investor Carlos Slim have been in talks over at

least two of the country's most promising fields, Reuters

revealed earlier this year.