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2025 PESA WEBINAR SERIES: What happened to CO2 storage in the Great Artesian Basin? (Navigating gas water rock reactions and potential groundwater impacts

Kindly supported by Rock Flow dynamics 
This live webinar will take place at:
11am – Perth
12.30pm – Darwin, Adelaide
1pm – Brisbane, Canberra, Hobart, Melbourne, Sydney
Use the calendar link on this page to add this event in to your own calendar at the correct local time for your location.
Tickets are free for members (please log in to see this) and $10 for non members.
Please buy your tickets and immediately follow the link in the ticket e-mail (not the calendar invite or this webpage, which is just generic and not event specific) to set up your registration with the webinar software well in advance of the time of the talk. Once registered with the webinar software you will receive a reminder e-mail 1 hour beforehand.
What happened to CO2 storage in the Great Artesian Basin? (Navigating gas water rock reactions and potential groundwater impacts)
Presented by Dr Julie Pearce (University of Queensland)
Abstract
Carbon dioxide geological storage is one option to enable Australia to reach net zero. Several carbon storage demonstration sites are undergoing feasibility studies and environmental impact assessment internationally and in Australia. Very recently CO2 storage in the Surat Basin gained a lot of media and political attention – the QLD government has now put a ban on CCS in the geographical extent of the QLD Great Artesian Basin (and below it). The reservoir that was being assessed is in a deep (~2300 m), brackish, unpotable part of the Precipice Sandstone. However, the broader formation is an aquifer of the GAB, therefore stakeholders were sensitive to potential environmental impacts. The previous demonstration site that underwent assessment was further north in the shallower part of the Precipice Sandstone (~1200 m). In that Glenhaven site the West Wandoan 1 well was drilled for the feasibility study, and the reservoir had fresh groundwater. This presentation details part of the experimental and field sampling components of the underlying research, including CO2-water-rock geochemical reactions, metal mobilisation, and creation of a reactive transport model.

