Production Restart at Montara

23 March 2023 - Singapore: Jadestone Energy plc ("Jadestone" or the "Company"), an independent oil and gas production company focused on the Asia-Pacific region, is pleased to announce that the Montara Venture FPSO ("Montara") offshore Australia resumed production operations early on Tuesday 21 March 2023.

In a carefully planned restart programme, production recommenced from the H6 well on the Montara field, with further wells to follow, including the first Skua subsea well which will be brought on line in the coming days.  Production rates will increase with the systematic opening of additional wells in line with the restart plan.

The Company will announce its production guidance for 2023 once Montara output is stabilised.

Paul Blakeley, President and CEO commented:

"I would like to thank everyone in Jadestone who has contributed to the safe and successful restart of Montara operations as we look forward to putting this challenging period behind us and returning to business as usual.  It is a relief to see operations at Montara being restored and we look forward to increasing production and cash flow.  We also plan to return to growth, having completed three acquisitions within the last six months, with several new acquisition opportunities in the pipeline.  Near-term organic growth from the Akatara project remains on track and with our first infill drilling programme in Malaysia, reinforcing the point that 2023 will be a big year for Jadestone."

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About Jadestone Energy

Jadestone Energy plc is an independent oil and gas company focused on the Asia-Pacific region.  It has a balanced, low risk, full cycle portfolio of development, production and exploration assets in Australia, Malaysia, Indonesia, Thailand and Vietnam.

The Company has a 100% operated working interest in the Stag oilfield and in the Montara project, both offshore Australia. Both the Stag and Montara assets include oil producing fields, with further development and exploration potential. The Company also has a 16.67% non-operated interest in the North West Shelf Oil Project offshore Western Australia, comprising four oil fields containing significant upside potential through potential infill drilling and life extension activities.

The Company has interests in four oil producing licences offshore Peninsular Malaysia; two operated and two non-operated positions, and a non-operated 9.52% interest in the Sinphuhorm producing gas field onshore Thailand.

Further, the Company has a 100% operated working interest in two gas development blocks in Southwest Vietnam, and an operated 100% interest in the Lemang PSC, onshore Sumatra, Indonesia, which includes the Akatara gas field development, where first production is expected in the first half of 2024.

Led by an experienced management team with a track record of delivery, who were core to the successful growth of Talisman's business in Asia, the Company is pursuing an acquisition strategy focused on growth and creating value through identifying, acquiring, developing and operating assets in the Asia-Pacific region.

Jadestone Energy plc (LEI: 21380076GWJ8XDYKVQ37) is listed on the AIM market of the London Stock Exchange (AIM: JSE).  The Company is headquartered in Singapore.  For further information on the Company please visit www.jadestone-energy.com.

This announcement does not contain inside information.