Authors / CoAuthors
Kalinowski, A. | Tenthorey, E. | Clennell, M.B. | Seyyedi, M. | Kempton, R. | Jackson, S. | Patterson, C. | Perera, S.
Abstract
<div>We have investigated whether water-saturated residual oil zones (ROZs), sometimes associated with conventional Australian hydrocarbon plays, could provide a CO2 storage resource and supplement depleted field storage. Our petrophysical study demonstrates that ROZs occur in Australia’s hydrocarbon-rich regions, particularly in the Cooper-Eromanga Basin. ROZs with more than 10% residual oil saturation are uncommon, likely due to small original oil columns and lower residual saturations retained in sandstone reservoirs than in classic, carbonate-hosted North American ROZs. Extensive, reservoir-quality rock is found below the deepest occurring conventional oil in many of the fields in the Eromanga Basin, potentially offering significant CO2 storage capacity. Multiphase compositional flow modelling was used to estimate the CO2 storage efficiency of typical Australian ROZs. We developed a novel modelling methodology that first captures oil migration events leading to the formation of ROZs. Modelling CO2 storage over a 20-year injection period demonstrates that CO2-oil interactions increase the density and viscosity of CO2, enhancing CO2 sweep efficiency and lateral flow, improving storage efficiency. The extent of these effects depends on the quantity and spatial distribution of residual oil in place and the miscibility of CO2 at reservoir conditions. Presented at the Australian Energy Producers (AEP) Conference & Exhibition (https://energyproducersconference.au/conference/)
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document
eCat Id
149205
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Keywords
- ( Project )
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- EFTF – Exploring for the Future
- ( Project )
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- Residual oil zone
- ( Project )
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- Australia's future energy resources
- ( Project )
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- CO2 storage
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- CO2 storage
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- residual oil zone
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- Cooper Basin
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- Eromanga Basin
- theme.ANZRC Fields of Research.rdf
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- Resource geoscience
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- Published_External
Publication Date
2024-06-18T06:03:19
Creation Date
2024-02-04T07:00:00
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Status
completed
Purpose
Extended abstract for the Australian Energy Producers (formerly APPEA) conference and journal, 2024.
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asNeeded
Topic Category
geoscientificInformation
Series Information
Australian Energy Producers (AEP) Conference & Exhibition 20-23 May 2024, Perth WA
Lineage
<div>The abstract was put forward to the <em>The Australian Energy Producers Conference and Journal</em> (2024) in September 2023 and accepted for oral presentation and extended abstract publication in October 2023. The paper reference for the journal is AJ23104.</div>
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[-44.00, -9.00, 112.00, 154.00]
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