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Monitoring Carbon Dioxide Sequestration using Electrical Resistance Tomography (ERT): Sensitivity Studies.

DE200515013143

Publication Date	2001
Personal Author	Newmark, R. L.; Ramires, A. L.; Daily, W. D.
Page Count	24
Abstract	If geologic formations are used to sequester carbon dioxide (CO(sub 2)), monitoring the CO(sub 2) injection will be required to confirm the performance of the reservoir system, assess leaks and flow paths, and understand the geophysical and geochemical interactions between the CO(sub 2) and the geologic minerals and fluids. Electrical methods are well suited for monitoring processes involving fluids, as electrical properties are sensitive to the presence and nature of the formation fluids. High resolution tomographs of electrical properties are now possible using a 3D technique called electrical resistance tomography (ERT). Surveys are commonly conducted utilizing vertical arrays of point electrodes in a cross-well configuration. Recent field results obtained using steel well casings as electrodes are promising. When 3D ERT imaging can be performed using existing well casings as long electrodes, the need for additional drilling of observation wells is minimized.
Keywords	Carbon dioxide Sequestration Reservoirs Monitoring Sensitivity Environmental migration Electrical conductivity Numerical modeling Tomography Electrical resistance tomography
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200602

Monitoring Carbon Dioxide Sequestration using Electrical Resistance Tomography (ERT): Sensitivity Studies.

Monitoring Carbon Dioxide Sequestration using Electrical Resistance Tomography (ERT): Sensitivity Studies.
DE200515013143

Publication Date	2001
Personal Author	Newmark, R. L.; Ramires, A. L.; Daily, W. D.
Page Count	24
Abstract	If geologic formations are used to sequester carbon dioxide (CO(sub 2)), monitoring the CO(sub 2) injection will be required to confirm the performance of the reservoir system, assess leaks and flow paths, and understand the geophysical and geochemical interactions between the CO(sub 2) and the geologic minerals and fluids. Electrical methods are well suited for monitoring processes involving fluids, as electrical properties are sensitive to the presence and nature of the formation fluids. High resolution tomographs of electrical properties are now possible using a 3D technique called electrical resistance tomography (ERT). Surveys are commonly conducted utilizing vertical arrays of point electrodes in a cross-well configuration. Recent field results obtained using steel well casings as electrodes are promising. When 3D ERT imaging can be performed using existing well casings as long electrodes, the need for additional drilling of observation wells is minimized.
Keywords	Carbon dioxide Sequestration Reservoirs Monitoring Sensitivity Environmental migration Electrical conductivity Numerical modeling Tomography Electrical resistance tomography
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200602