A team of engineers will make a fourth attempt to plug an oil leak in the Timor Sea on Friday.
The West Atlas oil rig operated by PTTEP Australasia has been leaking oil for nearly nine weeks.
Three previous attempts to intercept the leak have failed.
The ABC reports the company has issued a statement saying the drilling team has come within centimetres of the target.
Earlier this week, the Australian Maritime Safety Authority said the cost of the clean-up was more than $A5 million to date.