Woodside Petroleum says the 4,050-sq km (1,564-sq mi) North West Shelf Fortuna 3D seismic survey is expected to be completed by the end of May.

The survey vessel mobilized to northwest Australia in December and started the program on Jan. 6.Elsewhere in the region, front-end engineering continues for Persephone, the next major gas development planned for the North West Shelf project. A final investment decision is due later this year.

Persephone would be a subsea tieback to the North Rankin Complex (North Rankin A and North Rankin B).