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Temaris PSC Area Extension 15 October 2026
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Temaris PSC increased by 45% • New total area 1,770 km sq • Ensures all resources benefit from same enhanced fiscal terms Potential to double existing mean Prospective Resources • Current CPR identified ~1 TCF on existing area, update underway New 3D seismic being acquired late 2026 over the new area • PETRONAS-sponsored regional acquisition programme Additional firm work commitment funded from existing cash resources Source: Seascape2 Kerteh Temaris Temaris Area Extension Summary
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3 Tembakau Mengkuang Temaris Key Facts • Ownership: Seascape (100%) • Award: Jun-25 • Area Extension: Jan-27 • Size: 1,770 km2 • Water depth: ~68m • Reservoir depth: 800-1400m • Hydrocarbon: Gas (100%) • First gas: H2 2028 • Production: 100 mmscfd Sum of Negatives Composite Map Original Temaris PSC Area 2C Resources: 275 bcf Mean PR: 950 bcf* Temaris PSC Area Extension 2D Identified prospects / leads Seismic reprocessing identified significant extension of proven Miocene channel system Strong seismic amplitude response when gas-charged • Evident across enlarged Temaris PSC in multiple horizons Extension enables Seascape to capture the entire play • Rapidly monetise any incremental discoveries in the area. Firm work commitment met through existing resources • Process new 3D seismic • Contingent exploration well post- production start Allamanda Keladi Tembakau North Temaris PSC Tualang New prospectivity * Source: Sproule ERCE CPR Jan-26, excludes recently identified Tualang prospect
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Source: Seascape estimates, production profile assumes 95% uptime, pipeline route subject to route survey, not to scale4 Temaris 50 km Pre - built pipeline spur 6 spare well slots Additional riser 25 km Capture the play to rapidly monetise the upside 3 rd Party Host Facility
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Source: Seascape estimates5 Temaris delivering an execution-ready project by Q4 Sei 2026 2027 2028 Q4 H1 H2 H1 H2 FDAP FID Survey Long Leads Host Mods Offshore Execution First Gas Procurement & Construction Project Workstreams Targeting material gas production in only ~18 months Seismic Reprocessing Done, improved imaging New prospectivity added Resource Assessment Reservoir modelling done Updated CPR underway Well Head Platform Engineering underway Costs in-line Pipeline Market sounding complete Costs in-line Commercial Host platform engaged Gas Sales negotiation underway
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6 Capturing the entire play Countdown to FDP submission Farm-out underway Huge upside potential Temaris PSC area increased by 45%, large potential Prospective Resource uplift Field development plan submission imminent, deliver first gas in ~18 months Strong industry interest in an execution- ready development with huge upside Kertang drilling now <12 months away giving exposure to multi-Tcf exploration upside Growing our footprint Execution ready project Multi-TCF opportunities Uniquely positioned asset
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