The effect of supercritical CO2 on shaly caprocks
The effect of supercritical CO2 on the shaly caprocks is one of the critical issues to be considered in CO2 sequestration programs. Shale-scCO2 interactions can alter the seal integrity, leading to environmental problems and bringing into question the effectiveness of the program altogether. Several...
| Main Authors: | , |
|---|---|
| Format: | Journal Article |
| Language: | English |
| Published: |
MDPI
2019
|
| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/LE0775553 http://hdl.handle.net/20.500.11937/89563 |
| _version_ | 1848765246473240576 |
|---|---|
| author | Hadian, Pooya Rezaee, Reza |
| author_facet | Hadian, Pooya Rezaee, Reza |
| author_sort | Hadian, Pooya |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The effect of supercritical CO2 on the shaly caprocks is one of the critical issues to be considered in CO2 sequestration programs. Shale-scCO2 interactions can alter the seal integrity, leading to environmental problems and bringing into question the effectiveness of the program altogether. Several analytical studies were conducted on samples from Jurassic Eneabba Basal Shale and claystone rich facies of the Triassic Yalgorup Member (725–1417 m) in the Harvey CO2 sequestration site, Western Australia, to address the shale-scCO2 interactions and their effect on the petrophysical properties of the caprock. Shale samples saturated with NaCl brine were exposed to scCO2 under the reservoir condition (T = 60 ◦C, P = 2000 psi) for nine months and then tested to determine their altered mineralogical, petrophysical and geochemical properties. The experimental study examined changes to the mineralogical composition, capillary threshold pressure, and pore size distribution (PSD) of samples. The X-ray diffraction (XRD) results showed several changes in mineralogy because of rock-brine-CO2 reactions. Quartz, feldspars, kaolinite, and goethite were dissolved in most samples and muscovite, and halite were precipitated in general. Nuclear magnetic resonance (NMR), low-pressure nitrogen adsorption (LPNA), and mercury injection capillary pressure (MICP) tests indicate an increase in pore volume, except for relatively tighter, clay-rich samples. A reduction in capillary threshold pressures of samples after exposure to scCO2 is observed. |
| first_indexed | 2025-11-14T11:32:12Z |
| format | Journal Article |
| id | curtin-20.500.11937-89563 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:32:12Z |
| publishDate | 2019 |
| publisher | MDPI |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-895632023-08-02T06:39:15Z The effect of supercritical CO2 on shaly caprocks Hadian, Pooya Rezaee, Reza Science & Technology Technology Energy & Fuels carbon dioxide sequestration caprock integrity shale alteration rock-water-CO2 interaction lab tests under reservoir condition DEEP SALINE AQUIFERS CARBON-DIOXIDE SEQUESTRATION BRINE REACTIVITY DISPOSAL SANDSTONES RESERVOIRS PRESSURE CAPACITY The effect of supercritical CO2 on the shaly caprocks is one of the critical issues to be considered in CO2 sequestration programs. Shale-scCO2 interactions can alter the seal integrity, leading to environmental problems and bringing into question the effectiveness of the program altogether. Several analytical studies were conducted on samples from Jurassic Eneabba Basal Shale and claystone rich facies of the Triassic Yalgorup Member (725–1417 m) in the Harvey CO2 sequestration site, Western Australia, to address the shale-scCO2 interactions and their effect on the petrophysical properties of the caprock. Shale samples saturated with NaCl brine were exposed to scCO2 under the reservoir condition (T = 60 ◦C, P = 2000 psi) for nine months and then tested to determine their altered mineralogical, petrophysical and geochemical properties. The experimental study examined changes to the mineralogical composition, capillary threshold pressure, and pore size distribution (PSD) of samples. The X-ray diffraction (XRD) results showed several changes in mineralogy because of rock-brine-CO2 reactions. Quartz, feldspars, kaolinite, and goethite were dissolved in most samples and muscovite, and halite were precipitated in general. Nuclear magnetic resonance (NMR), low-pressure nitrogen adsorption (LPNA), and mercury injection capillary pressure (MICP) tests indicate an increase in pore volume, except for relatively tighter, clay-rich samples. A reduction in capillary threshold pressures of samples after exposure to scCO2 is observed. 2019 Journal Article http://hdl.handle.net/20.500.11937/89563 10.3390/en13010149 English http://purl.org/au-research/grants/arc/LE0775553 http://purl.org/au-research/grants/arc/LE0775551 http://creativecommons.org/licenses/by/4.0/ MDPI fulltext |
| spellingShingle | Science & Technology Technology Energy & Fuels carbon dioxide sequestration caprock integrity shale alteration rock-water-CO2 interaction lab tests under reservoir condition DEEP SALINE AQUIFERS CARBON-DIOXIDE SEQUESTRATION BRINE REACTIVITY DISPOSAL SANDSTONES RESERVOIRS PRESSURE CAPACITY Hadian, Pooya Rezaee, Reza The effect of supercritical CO2 on shaly caprocks |
| title | The effect of supercritical CO2 on shaly caprocks |
| title_full | The effect of supercritical CO2 on shaly caprocks |
| title_fullStr | The effect of supercritical CO2 on shaly caprocks |
| title_full_unstemmed | The effect of supercritical CO2 on shaly caprocks |
| title_short | The effect of supercritical CO2 on shaly caprocks |
| title_sort | effect of supercritical co2 on shaly caprocks |
| topic | Science & Technology Technology Energy & Fuels carbon dioxide sequestration caprock integrity shale alteration rock-water-CO2 interaction lab tests under reservoir condition DEEP SALINE AQUIFERS CARBON-DIOXIDE SEQUESTRATION BRINE REACTIVITY DISPOSAL SANDSTONES RESERVOIRS PRESSURE CAPACITY |
| url | http://purl.org/au-research/grants/arc/LE0775553 http://purl.org/au-research/grants/arc/LE0775553 http://hdl.handle.net/20.500.11937/89563 |