The sale comprised its equity in Block WA-20-L and adjacent exploration acreage.
The field is in natural decline, and produced about 6500 barrels per day in the quarter ending 31 December 2006.
The other project partners are Apache, with 31.5% and Santos, which holds 22.5%.
Woodside chief Don Voelte said selling the field would capture earnings and avoid abandonment costs.
He said that selling Legendre was partly about earnings protection, following delays to the Otway and Neptune projects.
