Brazilian state-run oil company Brazilian state-run oil company Petroleo Brasileiro SA (PBR, PETR4.BR), or Petrobras, backed out of the bidding for a stake in Portugal's Galp Energia (GALP.LB), saying Monday that talks with Italy's Eni SpA (E, ENI.MI) had ended.

Petrobras "has decided to end talks with Eni SpA without completing any acquisition of a stake in Galp Energia," the company said in a filing with local stock regulators. An Eni spokesperson also confirmed that the negotiations had ended.

The decision to end talks closes the books--for now--on what was seen as a strategic shift for Petrobras, which had pledged to rein in international investments as the company invests heavily to develop recently discovered offshore oil fields in
Brazil .

Petrobras will invest $224 billion through 2014 to develop the pre-salt fields, where Galp is also a partner. While Petrobras is flush with cash after raising nearly $70 billion in the world's largest-ever share offer last year, Eni's supposed asking price of EUR4.7 billion was seen as too rich a price to pay for Petrobras.

The failure to reach a deal leaves Eni looking for other possible buyers, although the company is not under pressure to unload the stake, Eni CEO Paolo Scaroni said.

"Galp Energia has so far been a great investment for Eni," Eni confirmed Scaroni as saying. "We are in no rush to sell our stake."

Eni is continuing to assess a "series of other opportunities" for its 33.4% stake in Galp, Scaroni said.

"We will (sell it) if and when we receive what we deem a fair offer," the Eni chief executive said.

Galp was state-owned until 2000, when it opened to strategic partners and Eni purchased its stake in the company. In 2005, the Portuguese government sold another third of Galp to a second investor, Amorim Energia--an energy group controlled by Portuguese businessman Americo Amorim. Amorim owns 55% of Amorim Energia, but Angolan state-oil firm Sonangol has a 45% stake in Amorim.

With Petrobras leaving the chase for Galp, eyes are now focused on Sonangol, which could decide to take a direct stake in the Portuguese company.

Portugal 's state bank Caixa Geral de Depositos, which owns 1% of Galp, still has a key say on new investors, and could favor an investment by Angola , which is increasingly important to the country of over 10 million people that is facing a severe sovereign debt crisis.

In January, Petrobras confirmed that it was evaluating the purchase of Eni's stake in Galp. Petrobras had been speculated as a possible buyer for the stake since the expiration of a Galp shareholder agreement in December.

Under a shareholder agreement that runs until 2013, Eni and Amorim Energia's one-third stakes in Galp were locked until the end of 2010. After that, either party could sell its stake, but only as a block and with the requirement that the other party is offered first refusal.

A deal with Petrobras would have further cemented the long history the company shares with Galp. The two firms participate in exploration consortia to develop the ultra-deepwater oil fields in
Brazil , while Petrobras is also active in exploring deepwater prospects off the coast of Portugal . Last year, the two companies also formalized a joint venture to produce 250,000 tons of biodiesel in Portugal .

Acquisition of a stake in Galp would have given Petrobras a greater share of some of the key offshore oil discoveries in
Brazil 's Santos Basin , home to the pre-salt oil finds. A deal would also have given Petrobras greater access to the European market, where biofuels consumption is expected to grow in coming years.

Petrobras also could have used Galp's refining capacity to process increased crude oil output from fields expected to come onstream over the next decade.

The company's preferred shares traded 0.5% higher at 27.77 Brazilian reais ($16.58) on the Sao Paulo Stock Exchange as of 1440 GMT.
Shares of Galp were down 0.9% at EUR15.02.