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ASEG Extended Abstracts ASEG Extended Abstracts Society
ASEG Extended Abstracts
RESEARCH ARTICLE

Monitoring Electrical Properties of Rocks in Target Zone of CO2-Sequestration Site

B. Sh. Singer and K. Dodds

ASEG Extended Abstracts 2004(1) 1 - 4
Published: 2004

Abstract

We address evaluation of resistivity of a target zone of a CO2-sequestration site using a simple measurement made from inside metal-cased boreholes. An approximate analytic expression is derived for the admittance measured between two metal casings in a stratified formation. It is shown that in a highly conductive environment measurement electrodes should be positioned inside the target depth range. Charts and plots are produced for evaluation of the admittance as function of the inter-casing separation and gas saturation in the target layer. The results indicate the possibility of monitoring the target zone using metal-cased borehole separated by distances of several hundreds meters.

https://doi.org/10.1071/ASEG2004ab134

© ASEG 2004

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