oa Mapping the Subsurface: Insights from Western Australia’s CO2 Storage Atlas Products

The Geological Survey of Western Australia has been working on a new CO2 geological storage atlas for Western Australia since July 2022. The atlas will incorporate newly updated and quality-controlled state-wide datasets to provide a regional assessment of the potential for CO2 geosequestration in the Perth, Southern Carnarvon, Northern Carnarvon (onshore and State waters), Canning and Officer basins.

As part of the reservoir quality assessment for the atlas, an initiative to convert WAPIMS wireline log data into an AI-ready database is underway. Using Python code, 8070 open-file LAS files have been converted into a unified format with consistent depth references, mnemonics, units, xyz coordinates, and well names suitable for AI. All state-wide raw and interpreted datasets including temperature and depth maps are being published and available for download from the GSWA WAPIMS database.

Structural mapping in depth is complete for the Perth and Officer Basins. Seismic interpretation and mapping of the Canning, Northern and Southern Carnarvon basins is ongoing. These maps form the basis for multi-1D modelling of subsurface temperature, which predicts lateral temperature variations that are incorporated into isothermal depth and temperature maps identifying reservoir units within the optimum temperature – pressure window for CO2 storage.