A major oil leak off northwestern Australia will continue for at least another week, while preparations are made to repair a damaged rig.
Millions of litres of oil have already poured into the Timor Sea from a ruptured well and is causing an environmental disaster that will continue to unfold for years to come, campaigners say.
A World Wildlife Fund (WWF) scientist told Al Jazeera on Friday that, according to visual estimates, about 10 million litres of oil have emptied into the ocean so far.
It began leaking oil on August 21. Since then, it has spewed between 400 and 2,000 barrels of crude into the Timor Sea each day.
PTTEP, a Thailand-based company, is in charge of the damaged well.
Engineers are currently trying to plug a 25cm hole that lies more than 2.5km under the sea bed.
Failed attempts
Three attempts to plug the leak have failed, and a fourth attempt was aborted last weekend because of technical difficulties.
PTTEP has thus far failed to stop the flow of sweet light crude oil, gas and condensate from the Montara wellhead, 250km northwest of the Truscott air base in Western Australia's Kimberley region.
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| A 25cm hole located 2.5km under the seabed is trying to be plugged |
The Australian government has released a report saying long-term monitoring will be needed to understand the full extent of the damage.
The report also said the presence of dying birds and sea snakes suggest animals have already been affected.
Gilly Llewellyn, director of conservation from the WWF, told Al Jazeera that if the spill happened closer to shore, there would be global outrage.
"If this spill was seen to affect Australian surfers or residents living near the beaches, more attention would be paid. But since it is so far out to sea, it seems to be a case of 'out of sight, out of mind'."
Clean-up operations
PTTEP is using electromagnetic ranging tools to home in on the damaged casing, and is calculating each failed drill attempt's distance from the pipe.
About 300 people are working on addressing the spill, PTTEP said.
Seventeen vessels and nine aircraft, including a Boeing 747, have been used in the operation.
The cost of the clean-up is said to have reached $4.9 million, an Australian senate hearing heard last week.
PTTEP has said it will pick up the bill for the operation.