The CarbonNet Project: 3D mapping and correlation of intraformational seals within the Latrobe Group in the nearshore Gippsland Basin
15th October 2015
The Global CCS Institute presents the sixth report published by the CarbonNet Project, located in Victoria, Australia, this report has focussed on a critical aspect of CO2 storage - containment of the CO2. CarbonNet are investigating the potential for establishing a large scale, multi user CCS network bringing together multiple CO2 capture projects, transporting CO2 via a shared pipeline and injecting it deep into an underground, offshore storage site and is currently in feasibility and commercial definition stage.
The Gippsland Basin is known to have a world-class proven regional seal (or caprocks), known as the Lakes Entrance Formation it has stored oil and gas accumulations for tens of millions of years. This regional seal has always been identified as the final barrier to CO2 plume migration in any storage concept in the basin. This report has identified several additional, laterally extensive seals below the regional seal, known as the T2 seal. These additional sealing units are expected to provide an effective barrier to the CO2 injected into the primary storage targets below in the Halibut reservoirs. The T2 seals are proven to be effective containment rocks as they have previously retained oil and gas accumulations locally and nearby. Also, lab measurements on rock samples of the seal suggest they could hold back a column of CO2 in excess of what is expected to be required in the reservoirs below. This investigation has revealed there may be hundreds of gigatonnes of additional storage available and confirms that the Gippsland Basin is a world class storage site for CCS.
This report is authored by N. Hoffman , T. Evans, N. Arian, The CarbonNet Project, Melbourne, Australia; Guy Holdgate, University of Melbourne. Chris Consoli, Institute Senior Adviser for Storage, Asia-Pacific also provides an overview of the report in an Insight available on the Global CCS Institute website.
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