Pemex (Petroleos Mexicanos) will invite contractors to take part in bidding for the Coridon natural gas project Burgos region in northern Mexico.
The company said that it could take four months from September to pick a successful bidder for the 15-year contract to expand the gas block.
In 2003 Pemex started to offer the Burgos gas blocks under long-term service agreements, attracting local and foreign oil companies.
In June 2009 Pemex exploration and production chief Carlos Morales Gil said that, under the service model, the company would open bids for three new blocks in Burgos.
Each block can pump 50 to 100 million cubic feet per day of natural gas, according to the company.