The well is being drilled in WA-269-P using the Atwood Falcon semi-submersible drilling rig, approximately 75 kilometres west of the Goodwyn "A" platform.
A Woodside spokesperson said further details, such as the water depth and the planned total depth, would remain confidential until a discovery was made.
Equities are Woodside (80%) and Japan Energy LNG (MIMI) (20%).