Chevron has withdrawn from an offshore block in north-west Australia's Browse basin that contains discoveries in the prolific Ichthys gas and condensate area.

According to a filing on the National Offshore Petroleum Titles Authority (Nopta) website, Santos and Inpex have been transferred Chevron's 50% interest in Block WA-74-R.

Santos now has a 60% operating interest and Inpex has 40%.

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A transfer of title was approved by Nopta on 26 February 2021.

Nopta also indicated on its website that a renewal of the retention lease beyond its expiry date of 16 November 2021 has been approved, although no further details were disclosed.

Block WA-74-R contains the Ichthys North/Concerto gas and oil discoveries, and is a 415.59 square-kilometre permit in the Browse basin.

The joint venture's work programme in the five years ending 16 November 2021 included engaging with Shell - as title holder of the Prelude project - and Inpex - as operator of the Ichthys field.

There was a requirement in the work programme to "progress discussions with the Prelude and Ichthys joint ventures targeted at exploring opportunities for third-party gas supply and/or options for field unitisations".