Oscar has claimed that the deal to take him from Chelsea to Chinese club Shanghai SIPG is "90 per cent certain".
The midfielder was subject to a huge £60million bid from Shanghai, who are now coached by former Chelsea manager Andre Villas-Boas, on Tuesday.
Current Blues boss Antonio Conte insisted last month that Oscar's long-term future lay at Stamford Bridge, but it is believed that Chelsea could be tempted to sell and re-invest the money by buying new players in January.
Oscar has started just six games in all competitions this season - nine overall - and the midfielder has now claimed that he is close to moving to China in January with only small details left to be completed.
Speaking to Brazilian broadcaster SporTV, the 25-year-old is reported to have said: "It's 90% certain.
"It just depends on some bureaucratic details."
Oscar joined Chelsea from Internacional for £25million in 2012, and was wanted by Chinese Super League club Jiangsu Suning earlier this year.
However, the midfielder did not want to leave Chelsea although he is thought to have since been swayed by the presence of Villas-Boas at Shanghai and the increasing number of Brazilians now playing in China, including former Blues teammate Ramires.
Oscar is likely to receive a significant pay rise to his current £90,000-per-week salary at Chelsea should he move to China, with the midfielder expected to earn anywhere upward of £300,000-a-week.
