(Adds details of injunction, background)
BRASILIA, Oct 18 (Reuters) - Odebrecht SA asked Brazil's Supreme Court on Wednesday to threaten fines against Venezuela's former chief prosecutor to stop her from leaking information from the engineering group's confidential plea bargain testimony.
In an injunction seen by Reuters, Odebrecht lawyers said leaks by ousted top prosecutor Luisa Ortega were undermining company efforts to cooperate with other governments. It asked that she be fined 50,000 reais ($15,770) a day if she continued to divulge information.
In December, Odebrecht and affiliated petrochemical company Braskem SA agreed to pay $3.5 billion in fines to settle a political bribery investigation with U.S., Brazilian and Swiss authorities. Aspects of the testimony that involved countries where Odebrecht did not reach a settlement with prosecutors have remained confidential.
Ortega was fired by a newly elected constituent assembly in August, months after she broke with Venezuela's socialist President Nicolas Maduro and became a vocal critic of his unpopular government. She fled to Bogota by boat and said she feared for her life.
During a visit to Brasilia days later, Ortega accused Diosdado Cabello, vice president of Maduro's Socialist Party, of receiving $100 million from Odebrecht through a Spanish company owned by two of his cousins.
Ortega said she would deliver documents on Odebrecht to U.S., Mexican, Spanish and Brazilian authorities implicating Maduro and other members of his government in illegal acts.
($1 = 3.1706 reais) (Reporting by Ricardo Brito; Editing by Richard Chang)