Cabeza, Y.

Carrera, Jesús

De Gaspari, F.

Luquot, Linda

Rötting, T.

Saaltink, M.W.

English

Digital.CSIC

Geophysical Research AbstractsVol. 16, EGU2014-16788-2, 2014EGU General Assembly 2014© Author(s) 2014. CC Attribution 3.0 License.Reactivity of Hontomín carbonate rocks to acidic solution injection:reactive "push-pull" tracer tests resultsFrancesca De Gaspari (1,2), Yoar Cabeza (1,2), Linda Luquot (2), Tobias Rötting (2), Maarten W. Saaltink (1),and Jesus Carrera (2)(1) UPC Barcelona Tech, Geotechnical Engineering and Geosciences, Barcelona,Spain, (2) Institute of EnvironmentalAssessment and Water Research (IDAEA-CSIC), Geosciences, Barceona, SpainSeveral field tests will be carried out in order to characterize the reservoir for CO2 injection in Hontomín (Burgos,Spain) as part of the Compostilla project of “Fundación Ciudad de la Energía” (CIUDEN). Once injected, thedissolution of the CO2 in the resident brine will increase the acidity of the water and lead to the dissolution ofthe rocks, constituted mainly by carbonates. This mechanism will cause changes in the aquifer properties such asporosity and permeability. To reproduce the effect of the CO2 injection, a reactive solution with 2% of acetic acid isgoing to be injected in the reservoir and extracted from the same well (reactive “push-pull” tracer tests) to identifyand quantify the geochemical reactions occurring into the aquifer. The reactivity of the rock will allow us alsoto evaluate the changes of its properties. Previously, theoretical calculations of Damkhöler numbers were done todetermine the acid concentrations and injection flow rates needed to generate ramified-wormholes patterns, duringtheses "push-pull" experiments. The aim of this work is to present the results and a preliminary interpretation ofthe field tests.

Reactivity of Hontomín carbonate rocks to acidic solution injection: reactive >push-pull> tracer tests results

https://digital.csic.es/bitstream/10261/214455/1/590444.pdf

Reactivity of Hontomín carbonate rocks to acidic solution injection: reactive >push-pull> tracer tests results

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