CO2 degassing and trapping during hydrothermal cycles related to Gondwana rifting in eastern Australia

Uysal, I. Tonguç; Golding, Suzanne D.; Bolhar, Robert; Zhao, Jian‐xin; Feng, Yuexing; Baublys, K. A.; Greig, Alan

doi:10.1016/j.gca.2011.07.018

Cited by 37 publications

(25 citation statements)

References 64 publications

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“…The importance of natural analogues to CCS have been recognised for a long time and several studies have been undertaken (e.g., Baines and Worden, 2004;Golding et al, 2013;Haszeldine et al, 2005;Higgs, 2011;Higgs et al, 2012;Kampman et al, 2013;Moore et al, 2005;Pearce et al, 1996;Stevens et al, 2003;Uysal et al, 2011;Watson et al, 2004aWatson et al, , 2004bWilkinson et al, 2009). …”

Section: Accepted M Manuscriptmentioning

confidence: 99%

The Pretty Hill Formation as a natural analogue for CO2 storage: An investigation of mineralogical and isotopic changes associated with sandstones exposed to low, intermediate and high CO2 concentrations over geological time

et al. 2015

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The Pretty Hill Formation as a natural analogue for CO 2 storage; An investigation of mineralogical and isotopic changes associated with sandstones exposed to low, intermediate and high CO 2 concentrations over geological time This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT ABSTRACTThe Pretty Hill Formation of the Otway Basin (Australia) has been studied as a natural analogue for geological storage of anthropogenic CO 2 in order to examine the effects that CO 2 concentration and reservoir heterogeneity have on CO 2 -related reactions. New petrographic data are presented, which validate the use of Hylogger TM as a tool to investigate high-resolution vertical changes in reservoir mineralogy. The integrated data set confirms earlier interpretations, showing that chlorite has been altered to kaolinite and siderite/ankerite in reservoir facies exposed to moderate and high CO 2 concentrations, while chlorite remains the dominant clay mineral in all parts of the formation where CO 2 content is low.Differences have been observed in the degree of CO 2 -related reaction relative to CO 2 concentration and reservoir heterogeneity. Where CO 2 content is very high (c. 98 mol%) and associated with high water saturations, both chlorite and detrital feldspars have undergone complete reaction in the reservoir facies, resulting in quartzose sandstones with a kaolinite matrix, and with siderite as the dominant carbonate precipitate. Conversely, where CO 2 content is moderate (c. 29-57 mol%) and within the gas leg of the reservoir, chlorite has undergone significant reaction, but much of the original feldspar is preserved, suggesting relatively minor reaction. Carbonate cements from the moderate CO 2 gas-leg comprise calcite, siderite and ankerite, occurring as cemented zones A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTassociated with rock heterogeneities and the present-day gas-water contact. Heterogeneities within the gas-leg are likely to have associated pore fluid contacts, whereby relatively high water saturations will be present in the fine-grained baffles and seals. The most advanced feldspar reaction occurs locally at the contact between baffles and reservoir rock, while reactions have been significantly impeded in the finer grained units due to their low permeabilities. These studies illustrate the importance of understanding both the reservoir composition and vertical heterogeneity of potential storage systems. Fluid-mineral reactions are likely to be advanced within stacked reservoir facies and impeded within siltstone layers, while the distributi...

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Section: Accepted M Manuscriptmentioning

confidence: 99%

The Pretty Hill Formation as a natural analogue for CO2 storage: An investigation of mineralogical and isotopic changes associated with sandstones exposed to low, intermediate and high CO2 concentrations over geological time

et al. 2015

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“…Fracture orientation relative to principal stress is also important though; a fracture aligned perpendicular to maximum horizontal stress is unlikely to be open for fluid flow and the matrix of black coal is effectively impermeable so coal could act as a good seal in such cases. Studies have shown that CO 2 has naturally migrated into and been stored within coal over geological timescales, both adsorbed within the organic coal matrix and via carbonate mineral formation (Faiz et al, 2007;Golding et al, 2011Golding et al, , 2013Uysal et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Mobilisation of elements from coal due to batch reactor experiments with CO2 and water at 40°C and 9.5MPa

Dawson

Golding

Biddle

et al. 2015

International Journal of Coal Geology

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“…Moreover, if multiple generations of illite are identified, geochronology can determine episodic fluid flow and, therefore, reconstruct thermal and fluid flow histories associated with tectonic evolution of a sedimentary basin. Previously such work utilised Rb-Sr dating or a combination of RbSr and K-Ar (Ohr et al, 1991;Uysal et al, 2001;Uysal et al, 2004;Golding et al, 2006;Uysal et al, 2011). Dating by the Sm-Nd method was also integrated into these works, with varying success, due to its resistance to isotopic resetting compared to the Sr-or Ar-systems and allowed dating of multiple periods of hydrothermal fluid flow (Stille and Clauer, 1986;Ohr et al, 1991;Bros et al, 1992;Schaltegger et al, 1994;Toulkeridis et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Integrating 40Ar–39Ar, 87Rb–87Sr and 147Sm–143Nd geochronology of authigenic illite to evaluate tectonic reactivation in an intraplate setting, central Australia

Middleton

Uysal

Bryan

et al. 2014

Geochimica et Cosmochimica Acta

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CO2 degassing and trapping during hydrothermal cycles related to Gondwana rifting in eastern Australia

Cited by 37 publications

References 64 publications

The Pretty Hill Formation as a natural analogue for CO2 storage: An investigation of mineralogical and isotopic changes associated with sandstones exposed to low, intermediate and high CO2 concentrations over geological time

The Pretty Hill Formation as a natural analogue for CO2 storage: An investigation of mineralogical and isotopic changes associated with sandstones exposed to low, intermediate and high CO2 concentrations over geological time

Mobilisation of elements from coal due to batch reactor experiments with CO2 and water at 40°C and 9.5MPa

Integrating 40Ar–39Ar, 87Rb–87Sr and 147Sm–143Nd geochronology of authigenic illite to evaluate tectonic reactivation in an intraplate setting, central Australia

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