Facies-based rock properties characterization for CO2 sequestration: GSWA Harvey 1 well,Western Australia |
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| Institution: | 1. Department of Applied Geology, Curtin University, GPO Box U1987, Bentley, Perth, WA 6845, Australia;2. CSIRO Earth Sciences and Resource Engineering, PO Box 1130, Bentley, WA 6102, Australia;3. Department of Petroleum Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia;4. Geological Survey of Western Australia, Department of Industry and Resources, Mineral House, 100 Plain Street, East Perth, WA 6004, Australia;5. Geological Survey of Western Australia, Core Library, 37 Harris Street, Carlisle, WA 6101, Australia;1. Durham University, Department Earth Sciences, Durham, UK;2. University of Bergen, Department of Mathematics, Bergen, Norway;3. NGI, Department of Petroleum Geomechanics and Geophysics, Oslo, Norway;1. Department of Geosciences, College of Petroleum Engineering and Geosciences (CPG), King Fahd University of Petroleum and Minerals, 31261, Dhahran, Saudi Arabia;2. Department of Geological Sciences, University of Texas at Austin, 1 University Station, C-1100, Austin, TX, 78712, USA;3. Center for Integrative Petroleum Research (CIPR), College of Petroleum Engineering and Geosciences (CPG), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia;1. Key-Laboratory for Oil Shale and Coexisting Minerals Mineralization & Exploration and Exploitation, Jilin University, Changchun 130061, China;2. Qingdao Institute of Marine Geology, Qingdao 266071, China;1. Petroleum and Mining Engineering, Department of Environment, Land and Infrastructure Engineering, Politecnico di Torino, Italy;2. Department of Petroleum & Gas Engineering, University of Engineering and Technology (UET), Lahore, Pakistan;3. Department of Petroleum Engineering, Curtin University, Malaysia;4. Department of Petroleum Engineering, University of North Dakota, USA;5. Department of Geological Engineering, University of Engineering and Technology (UET), Lahore, Pakistan;1. Department of Earth and Environmental Sciences, Wright State University, 3640 Col. Glenn Hwy., Dayton, OH 45435, USA;2. Illinois State Geological Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign, 615 East Peabody Drive, Champaign, IL 61820, USA;1. College of Geology and Environment, Xi''an University of Science & Technology, Xi''an, 710054, China;2. Shaanxi Key Laboratory of Carbon Dioxide Sequestration and Enhanced Oil Recovery, Xi''an, 710065, China;3. National and Local Joint Engineering Research Center for Carbon Capture Utilization and Sequestration & State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an, 710069, China;4. State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan, 430074, China;5. Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization, China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China;6. Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Ministry of Education, Northeast Petroleum University, Daqing, 163318, China |
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| Abstract: | GSWA Harvey 1 was drilled as part of the South West CO2 Geosequestration Hub carbon capture and storage project (South West Hub) to evaluate storage volume, injectivity potential and carbon dioxide retention capacity in the south-western Perth Basin. Six cored intervals from the Triassic Lesueur Sandstone contain nine lithofacies consistent with fluvial depositional environments: the lower Wonnerup Member is dominated by fluvial lithofacies consisting of stacked beds of porous, permeable sandstone deposited as high-energy fill and barforms, with rare finer-grained swampy/overbank deposits. The overlying Yalgorup Member contains mainly floodplain palaeosols with low- to moderate-energy barforms. The high- to moderate-energy fluvial facies typically have a low gamma response and contain clean, medium to very coarse-grained quartz-dominated sandstones. Other clastic components include K-feldspar (8–25%) with trace muscovite, garnet and zircon, and interstitial diagenetic kaolinite (up to 15%) and Fe-rich chlorite (up to 13%). The low-energy facies contain variably interbedded mudstone and thin, moderate to well sorted fine-grained sandstone, typically with a high gamma response, and are consistent with deposition under swampy, overbank and palaeosol conditions. These facies have significantly higher proportions of mica and diagenetic clays, including smectite (up to 8%) and illite (up to 10%), and detrital plagioclase (up to 21%) and trace carbonate bioclasts. High porosity and permeability in the cored intervals of the Wonnerup Member indicate good reservoir characteristics in terms of storage capacity and injectivity at depths relevant to CO2 injection (>1500 m). High porosity and extremely variable permeability values in the Yalgorup Member were measured. The variation is due to permeable vertical sandstone features in low permeability sandy mudstone and indicate limited sealing potential, although the spatial connectivity of the vertical features cannot be resolved from the available core. A preliminary assessment of the area as a CCS site seems favourable; however, the project is only in the early stages of its characterization and far more regional and site-specific data are needed to evaluate how injected CO2 may behave in the subsurface. |
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| Keywords: | South West Hub Carbon capture and storage Lesueur Sandstone Perth Basin |
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