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An Experimental Study of the Effect of Rock/Fluid Interaction on Resistivity Logs during CO2 Sequestration in Carbonate Rocks

DOI: 10.4236/gep.2014.23001    3,243 Downloads   4,199 Views  

ABSTRACT

Accurate laboratory measurements and analysis of electrical properties of core samples are a prerequisite step to the evaluation of oil and gas reserves. In recent times, this evaluation technique has been adopted in carbon dioxide sequestration projects for estimating and monitoring carbon dioxide (CO2) accumulation in saline aquifers. Several papers have reported laboratory success in the use of resistivity measurements to monitor the flow and also estimate the volume of CO2 plume in geological formations. Such laboratory experiments did not capture the effect of CO2 -brine-rock interaction (CBRI) on saturation estimation. The possibility of a change in value resistivity due to CO2/brine/rock interactions, and the possible effect on CO2 monitoring and estimation are of immediate interest here. Preliminary results of an ongoing research work showed that a much longer experiment time accommodates CO2-brine-rock interaction which ultimately lead to change in rock resistivity. We hereby present the electrical behavior of carbonates to CO2/ brine/rock interaction during prolonged CO2 sequestration and the effect on saturation estimation. This electrical behavior and its possible effect on CO2 monitoring and estimation are discussed.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Adebayo, A. and Mahmoud, M. (2014) An Experimental Study of the Effect of Rock/Fluid Interaction on Resistivity Logs during CO2 Sequestration in Carbonate Rocks. Journal of Geoscience and Environment Protection, 2, 1-7. doi: 10.4236/gep.2014.23001.

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