The company said its offshore well intervention vessel, Havila Harmony, successfully deployed, installed and tested seven subsea trees and carried out wireline operations on the seven wells.

"This marks the first-ever fully integrated rigless subsea well intervention project in the Asia Pacific region," TSMarine said.

According to the company, the project also marked other milestones, including the first deployment and installation on wire of subsea trees from a monohull vessel in the region, and using wireline services from a monohull vessel to carry out the project.

"The world record water depth for subsea wireline intervention from a monohull vessel is 377 metres," TSMarine chief executive Alasdair Cowie said.

"In our first-ever subsea well intervention project we operated at a water depth of 372 metres, a significant achievement within this hugely successful project."

TSMarine Asia Pacific operations regional director John Edwards said the success of the project was a culmination of more than two years of planning and engineering, and working closely with Woodside and primary subcontractors.

"Achieving wireline runs with significant success rates, and reaching down hole well depths of 1450 metres from the Harmony is an extremely pleasing result that is of fundamental importance to the next stage of our campaign with Woodside Energy," he said.

Woodside's Vincent project in WA-28-L is believed to contain about 73 million barrels of oil equivalent and was first discovered in 1998.

First oil production from the field is scheduled to begin this year.

Partners in the Vincent project are operator Woodside (60%) and Mitsui E&P Australia (40%).