Data

Processed 3D Tomographic Images of Repeated CO2 and Brine injections into Layered Bentheimer Sandstone

The Australian National University
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.25911/n5jv-cs64&rft.title=Processed 3D Tomographic Images of Repeated CO2 and Brine injections into Layered Bentheimer Sandstone&rft.identifier=10.25911/n5jv-cs64&rft.publisher=The Australian National University&rft.description=The raw grayscale tomographic data volumes for all initial (post-CO2 injection) and residual (post-brine injection) scans were first registered to the dry tomographic data set to allow direct and precise comparison of phase distributions in each data set. Data volumes were cropped to a central region, and grayscale intensity variation (due to beam hardening and attenuation distortion due to high-density flow diffusers at the core ends) was corrected in radial and vertical directions. The dry scan was segmented into three phases (pore, solid grains, and clays) using converging active contours CAC) segmentation routines. Three-phase segmentation (scCO2, brine, solid grains) was accomplished by overlaying the phase-labeled dry data set on all the registered initial and residual data volumes, and performing a final additional CAC routine to distinguish between scCO2 and brine, only on the regions labeled pore in the dry data set. Speckle noise removal was accomplished by removing scCO2-labeled clusters smaller than 234 voxels (equivalent to a sphere with a radius of 15.0 micron), and also by removing any isolated inclusions from within the scCO2 phase. Data is segmented and in .nc format (https://www.unidata.ucar.edu/software/netcdf/). For DRY data set: 0=void/pore space; 1=Sandstone grains For initial (SI#) and residual (SR#) data: 0=scCO2; 1=brine; 2=sandstone grains 1000^3 voxel subsets of data were taken from the top, middle, and bottom regions of the core; these subsets are provided here. Data is labeled with the following nomenclature: segmentedHiRes_roi_CO2_injection_1_a_SStop_nc segmentedHiRes_roi_Brine_injection_1_SStop_nc CO2 or Brine indicates the type of injection directly preceeding the scan acquisition; the numeral [1-4] indicates the cycle number, the letter [a-d] desginates the sequence of CO2 injections (for cycles with repeated CO2 injections) ; and the region is indicated directly. Full experimental details (including flow rates and scan types) are included in: A.L. Herring, Sun, C., Armstrong, R.T., and Saadatfar, M. Insights into Wettability Alteration during Cyclic scCO2-Brine Injections in a Layered Bentheimer Sandstone, Water Resour. Res. (submitted 2022).3D X-ray tomographic data acquired for over four scCO2-brine injection cycles into a layered Bentheimer sandstone; exhibiting changes in scCO2 morphology and distribution. The data provides insight into wettability alteration occuring during injections.&rft.creator=Anonymous&rft.date=2022&rft_rights=Creative Commons Licence (CC BY) is assigned to this data. Details of the licence can be found at http://creativecommons.org.au/licences. &rft_rights= http://creativecommons.org/licenses/by/3.0/au/deed.en&rft_subject=Environmental engineering not elsewhere classified&rft_subject=Environmental engineering&rft_subject=ENGINEERING&rft_subject=Petroleum and reservoir engineering&rft_subject=Resources engineering and extractive metallurgy&rft_subject=Carbon sequestration science&rft_subject=Climate change impacts and adaptation&rft_subject=ENVIRONMENTAL SCIENCES&rft_subject=CO2 sequestration&rft_subject=Wettability&rft_subject=tomography&rft_subject=capillary trapping&rft_subject=residual trapping&rft_subject=multiphase&rft.type=dataset&rft.language=English Access the data

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http://creativecommons.org/licenses/by/3.0/au/deed.en

Creative Commons Licence (CC BY) is assigned to this data. Details of the licence can be found at http://creativecommons.org.au/licences.

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Contact Information

anna.herring@anu.edu.au

Full description

The raw grayscale tomographic data volumes for all "initial" (post-CO2 injection) and "residual" (post-brine injection) scans were first registered to the dry tomographic data set to allow direct and precise comparison of phase distributions in each data set. Data volumes were cropped to a central region, and grayscale intensity variation (due to beam hardening and attenuation distortion due to high-density flow diffusers at the core ends) was corrected in radial and vertical directions. The dry scan was segmented into three phases (pore, solid grains, and clays) using converging active contours "CAC") segmentation routines. Three-phase segmentation (scCO2, brine, solid grains) was accomplished by overlaying the phase-labeled dry data set on all the registered initial and residual data volumes, and performing a final additional CAC routine to distinguish between scCO2 and brine, only on the regions labeled "pore" in the dry data set. Speckle noise removal was accomplished by removing scCO2-labeled clusters smaller than 234 voxels (equivalent to a sphere with a radius of 15.0 micron), and also by removing any isolated inclusions from within the scCO2 phase.

Data is segmented and in .nc format (https://www.unidata.ucar.edu/software/netcdf/).
For "DRY" data set: 0=void/pore space; 1=Sandstone grains
For initial ("SI#") and residual (SR#) data: 0=scCO2; 1=brine; 2=sandstone grains

1000^3 voxel subsets of data were taken from the "top", "middle", and "bottom" regions of the core; these subsets are provided here. Data is labeled with the following nomenclature:
segmentedHiRes_roi_CO2_injection_1_a_SStop_nc
segmentedHiRes_roi_Brine_injection_1_SStop_nc

"CO2" or "Brine" indicates the type of injection directly preceeding the scan acquisition; the numeral [1-4] indicates the cycle number, the letter [a-d] desginates the sequence of CO2 injections (for cycles with repeated CO2 injections) ; and the region is indicated directly. Full experimental details (including flow rates and scan types) are included in:
A.L. Herring, Sun, C., Armstrong, R.T., and Saadatfar, M. "Insights into Wettability Alteration during Cyclic
scCO2-Brine Injections in a Layered Bentheimer Sandstone", Water Resour. Res. (submitted 2022).

Notes

1.86 GB.

Significance statement

3D X-ray tomographic data acquired for over four scCO2-brine injection cycles into a layered Bentheimer sandstone; exhibiting changes in scCO2 morphology and distribution. The data provides insight into wettability alteration occuring during injections.

Created: 2020