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2D Model Study of CO2 Plumes in Saline Reservoirs by Borehole Resistivity Tomography
Author
Source
International Journal of Geophysics
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-12-15
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
The performance of electrical resistivity tomography (ERT) in boreholes is studied numerically regarding changes induced by CO2 sequestration in deep saline reservoirs.
The new optimization approach is applied to generate an optimized data set of only 4% of the comprehensive set but of almost similar best possible resolution.
Diverse electrode configurations (mainly tripotential α and β) are investigated with current flows and potential measurements in different directions.
An extensive 2.5D modeling (>100,000 models) is conducted systematically as a function of multiparameters related to hydrogeology, CO2 plume, data acquisition and methodology.
ERT techniques generally are capable to resolve storage targets (CO2 plume, saline host reservoir, and impermeable cap rock), however with the common smearing effects and artefacts.
Reconstructed tomograms show that the optimized and multiply oriented configurations have a better-spatial resolution than the lateral arrays with splitting of potential and current electrode pairs between boreholes.
The later arrays are also more susceptible to telluric noise but have a lower level of measurement errors.
The resolution advance of optimized and multiply oriented configurations is confirmed by lower values for ROI (region of index) and residual (relative model difference).
The technique acceptably resolves targets with an aspect ratio down to 0.5.
American Psychological Association (APA)
al-Hagrey, Said A.. 2011. 2D Model Study of CO2 Plumes in Saline Reservoirs by Borehole Resistivity Tomography. International Journal of Geophysics،Vol. 2011, no. 2011, pp.1-12.
https://search.emarefa.net/detail/BIM-499439
Modern Language Association (MLA)
al-Hagrey, Said A.. 2D Model Study of CO2 Plumes in Saline Reservoirs by Borehole Resistivity Tomography. International Journal of Geophysics No. 2011 (2011), pp.1-12.
https://search.emarefa.net/detail/BIM-499439
American Medical Association (AMA)
al-Hagrey, Said A.. 2D Model Study of CO2 Plumes in Saline Reservoirs by Borehole Resistivity Tomography. International Journal of Geophysics. 2011. Vol. 2011, no. 2011, pp.1-12.
https://search.emarefa.net/detail/BIM-499439
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-499439