Quokka-1 Appraisal Well Completion

under development

Santos completed the Quokka-1 appraisal well on the North Slope in Alaska, reaching a depth of 4,767 feet and encountering high-quality reservoir sands within the Nanushuk formation. Initial testing showed 143 feet of net oil pay with 19% porosity and a flow rate of 2,190 barrels of oil per day after stimulation. The discovery confirms light-gravity oil presence correlating with the 2020 Mitquq-1 discovery. The data supports potential development of a two-drill-site project with production capacity comparable to the Pikka Phase 1 Project. Santos plans a 3D seismic survey in the 2026-2027 winter season to optimize planning. The facility is mechanically complete and commissioning is progressing, with fuel gas introduced to the plant. Santos holds a 51% operating interest in the Quokka Unit, with Repsol holding 49%.