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https://epbcpublicportal.awe.gov.au/all-referrals/project-referral-summary/?id=19a5af33-1966-ed11-9561-00224818aa41

Senex Energy Pty Ltd (Senex), through its subsidiaries Senex Assets Pty Ltd and Senex Assets 2 Pty Ltd, is planning to develop the Atlas Stage 3 Gas Project. The Project is to develop, operate, decommission and rehabilitate up to 151 coal seam gas wells; gas and water gathering systems for the producing wells; access tracks; brine and produced water storages; borrow pits; and ancillary supporting facilities on Authority to Prospect (ATP) 2059, Petroleum Lease (PL) 445, the northern portion of PL209 and parts of PL1037 in the central part of the Surat Basin, Queensland (the proposed action/Project). Att A Figures, Figure 1 shows the location of each Project tenement. The gas field will be progressively developed over a period of ~5–10 years. The proposed action will enable the development of ~200PJ of additional resource of natural gas to be produced for domestic and international markets.

The total Project Area is 12,304ha and the potential disturbance footprint matches that Project Area. However, Senex has committed to a maximum disturbance limit of 530ha within the Project Area and potential disturbance footprint. Actual ground disturbance locations are subject to design refinement, constraints assessment and land access negotiation and will be determined iteratively during progressive development of the gas field.

Coal seam gas wells

Wells will generally be spaced 500–750m apart. The wells will be designed, constructed, decommissioned and rehabilitated in accordance with applicable State Code of Practice. Well sites will generally be constructed in an area of ~80m x 70m. The layout and size of well sites will vary but typically 0.6ha is required. In some cases up to ~1ha is required to accommodate site constraints. Well construction will involve a drill rig and other equipment eg drill fluid pumps, processing and storage for water supply, fuel, and chemicals. Following drilling of the well, sites will be partially rehabilitated, leaving an area of ~60m x 60m for workover rig operations.

Hydraulic stimulation (fraccing) of wells is not required and is not part of the proposed action. Management of residual drilling material includes offsite and onsite options, managed in accordance with State approvals.