Jadestone Energy Regulatory News (JSE)

Montara Operations Update

31 July 2023 - Singapore: Jadestone Energy plc ("Jadestone", or the "Company") an independent oil and gas production company focused on the Asia-Pacific region, provides the following update on operations at the Montara Venture FPSO offshore Australia.

On 29 July 2023, a gas alarm was triggered within ballast water tank 4S, indicating possible communication with one of the adjacent tanks within the FPSO.

Production from the Montara fields has been temporarily shut in and key stakeholders, including the National Offshore Petroleum Safety and Environmental Management Authority ("NOPSEMA"), were notified of the incident.

Tank 4S will be emptied and cleaned over the next week to permit an inspection to identify the source of the communication between tanks and allow for appropriate repairs. Following the inspection, a further update will be provided outlining next steps, any potential costs and any impact to production guidance.

At 30 June 2023, the Company had c.US$118 million of consolidated cash balances (restricted and unrestricted cash) and c.US$111 million of debt drawn under the Company's reserves-based lending ("RBL") facility, resulting in a net cash position of US$7.1 million. In addition, the Company's US$35 million Standby Working Capital facility remains undrawn.

Paul Blakeley, President and CEO commented:

"While disappointing and frustrating to have to shut in Montara again, we will find and repair any additional defect while continuing with the overall planned programme of inspection of the storage tanks on the FPSO. The safety of our personnel, as well as the long-term integrity of the asset, are paramount. We will provide a further update once the inspection of tank 4S is complete."

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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 and increasingly diversified portfolio of production and development assets in Australia, Malaysia, Indonesia, Thailand and Vietnam, all stable jurisdictions with a positive upstream investment climate.

Led by an experienced management team with a track record of delivery, who were core to the successful growth of Talisman Energy's business in Asia-Pacific, the Company is pursuing a strategy to grow and diversify the Company's production base both organically, through developments such at Akatara in Indonesia and Nam Du/U Minh in Vietnam, as well as through acquisitions that fit within Jadestone's financial framework and play to the Company's strengths in managing maturing oil assets. Jadestone delivers value in its acquisition strategy by enhancing returns through operating efficiencies, cost reductions and increased production through further investment.

Jadestone is a responsible operator and well positioned for the energy transition through its increasing gas production, by maximising recovery from existing brownfield developments and through its Net Zero pledge on Scope 1 & 2 GHG emissions from operated assets by 2040. This strategy is aligned with the IEA Net Zero by 2050 scenario, which stresses the necessity of continued investment in existing upstream assets to avoid an energy crisis and meet demand for oil and gas through the energy transition.

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.

The information contained within this announcement is considered to be inside information prior to its release, as defined in Article 7 of the Market Abuse Regulation No. 596/2014 which is part of UK law by virtue of the European Union (Withdrawal) Act 2018.