(Corrects judgment by Ecuador's high court in paragraph)
By Mica Rosenberg
NEW YORK, April 25(Reuters) - A federal judge on Friday rejected a bid by a U.S. lawyer to stall the enforcement of a ruling that found he used fraud to secure a $9.5 billion pollution judgment against Chevron Corp in Ecuador.
Lawyer Steven Donziger is appealing a 500-page decision issued by U.S. District Judge Lewis Kaplan in March that barred him from collecting on a $9.5 billion judgment against Chevron in the United States.
Chevron filed a lawsuit against Donziger in New York, claiming he used bribery and fake evidence to win the historic damage award for a group of villagers who claimed the oil giant polluted an area of northeastern Ecuador.
An Ecuadorean judge had awarded the villagers $18 billion in 2011 but the country's high court later cut the judgment in half.
Kaplan ruled Donziger had bribed a former judge to ghost-write the Ecuadorean judgment and committed other improprieties, finding him liable for fraud and racketeering.
Donziger had asked Kaplan to put the decision on hold while a federal appeals court considers the merits of his challenge, a process that will likely take months to resolve.
But in Friday's order, Kaplan said Donziger's arguments for a stay were largely "without merit."
Donziger's "claims of irreparable injury rest on a pastiche of unsupported assertions, contradictions of undisputed evidence and fertile imagination," Kaplan's opinion said.
Kaplan did grant Donziger narrow relief on one point.
He allowed that the shares Donziger holds in a company called Amazonia, organized to collect and distribute any proceeds of Ecuadorean judgment, will be held by the court - not Chevron - pending the final outcome of the appeal.
Chevron spokesman Morgan Crinklaw called the attorney's motion to stay "yet another attempt to delay and distract from the unrebutted evidence against him" and said the company was confident it would win in the appeals court.
Donziger's attorney said he had no comment.
The long-running case centers on an oil field in the Amazon jungle, known as Lago Agrio, where Texaco operated from 1964 to 1992. Chevron later acquired Texaco.
Chevron asserts that Texaco cleaned up the site before handing it over to a state-controlled company but the villagers say they are still suffering from the legacy of environmental contamination.
Donziger has repeatedly accused Kaplan of bias and claimed the judge allowed personal animosity to cloud his decision. He denies the bribery and fraud allegations.
The New York ruling does not restrict the villagers from trying to seek enforcement of the Ecuadorean judgment outside the United States.
A Canadian court ruled in December that Ontario was a proper jurisdiction for the Ecuadorean plaintiffs to press Chevron to pay up and the country's Supreme Court earlier this month agreed to hear the company's appeal of that ruling.
The Ecuadoreans are also pursuing cases in Argentina and Brazil in the hopes of one day seeing a payout from the case.
The case is Chevron Corp v. Steven Donziger et al, U.S. District Court for the Southern District of New York, No. 11-0691. (Additional reporting by Nate Raymond and Joseph Ax; Editing by David Gregorio)