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.

The company signed an agreement last year to partner

with Pemex to develop the project in the Gulf of Mexico, aiming

to revive a venture that the state-owned company had twice

before abandoned.

"What is being reviewed is the feasibility in terms of cost

versus benefit, because gas prices do not match the investment

required," Arturo Spinola, Grupo Carso's Chief Financial

Officer, said during a call on the company's third-quarter

results.

Pemex and companies 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.

In February, Slim described the Lakach project as

"complicated," noting that the depth of the resource offshore

adds to the difficulty.

The field, located about 90 kilometers from the port of

Veracruz, holds an estimated 900 billion cubic feet of gas,

according to available data.