Colombian state oil company Ecopetrol S.A. said Monday that it bid on exploration rights in six blocks of U.S. waters in the Gulf of Mexico.

Five of the bids are in partnership with Murphy Exploration and Production and Repsol E&P USA Inc, while the sixth is a collaboration with Apache Corporation and Samson Offshore, Ecopetrol said in a statement.

Ecopetrol's bids were the most competitive for six blocks in Central Planning Area Lease Sale 216/222. The U.S. Bureau of Ocean Energy Management will award the blocks after a months-long review.

"With the results from this round, Ecopetrol could raise its share to 122 blocks in one of the most attractive areas for exploration in the world," the Colombian company said.

The bids by Ecopetrol and its partners total roughly $40 million, with the Colombian firm accounting for $1275 million of that.

Ecopetrol, Colombia's largest enterprise, posted $8.6 billion in net income in 2011, up 85 percent from the previous year.

The company's average daily output in 2011 came in at 724,100 barrels of oil equivalent per day.

Ecopetrol, which accounts for more than 60 percent of Colombia's crude production, also is involved in exploration and production activities in Brazil, Peru and the U.S. Gulf Coast. EFE