-report@ (Adds poll showing Bolsonaro with wide lead)
RIO DE JANEIRO, Oct 15 (Reuters) - Brazil's far-right presidential front-runner Jair Bolsonaro could revise the country's model of production-sharing contracts in its coveted pre-salt oil fields if he wins this month's election, newspaper Valor reported on Monday.
The poll leader ahead of the Oct. 28 run-off vote could also end overseas financing by state development bank BNDES , Valor reported, citing unnamed campaign sources, as Bolsonaro looks to overhaul the country's state-run entities.
A longstanding advocate of state control over key strategic assets like government-run Petroleo Brasileiro SA and Centrais Eletricas Brasileiras SA, Bolsonaro has recently changed tack, falling more closely in line with key advisors who favor privatizing assets.
But a rival camp of advisors, made up of military generals, have urged Bolsonaro to maintain control of Petrobras and other assets they consider strategic, Reuters reported last week, opening up a split that could disappoint investors who snapped up Petrobras shares in the wake of Bolsonaro's first-round win.
Bolsonaro's campaign did not immediately respond to a request for comment.
Petrobras shares were up 2.2 percent in late morning trading.
Bolsonaro maintained a wide lead over his leftist rival Fernando Haddad in a second election poll looking at voter intentions for the run-off vote that was published on Monday. The Ibope poll showed that Bolsonaro had 59 percent of voter support, compared to Haddad's 41 percent.
Brazil's production-sharing contract model for its pre-salt oil fields was rolled out by the leftist Workers Party, which ran Brazil for 13 of the last 15 years, and has been blamed by many for a weak economy and endemic graft.
Reformed by the center-right government of Michel Temer, who took office in 2016 after former President Dilma Rousseff was impeached, the production-sharing model has proved successful in recent auctions, luring oil majors like Exxon Mobil Corp Chevron Corp, Repsol SA, Royal Dutch Shell Plc , and BP Plc.
Higher oil prices and the need to replace shrinking reserves have boosted oil majors' appetites for costlier offshore ventures, pumping much-needed money into Brazil's coffers.
The Valor article did not give details on how Bolsonaro would tweak the production-sharing model, but cited campaign sources who said the aim was to attack some of the political abuses perpetrated by previous administrations.
Under Rousseff, Brazil's government used the BNDES to offer loans to countries like Venezuela, Cuba and Mozambique that they would use to contract Brazilian firms.
The Brazilian government, under Rousseff, had agreed to act as the guarantor of the loans. The funds were used by Venezuela and Mozambique to pay works carried out by Brazilian firms.
In May, Brazil said it would continue to insist Venezuela and Mozambique pay back nearly 1 billion reais ($281.05 million) in loans they defaulted on to BNDES and Switzerland's Credit Suisse. (Reporting by Gabriel Stargardter Editing by Marguerita Choy)