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Modelling acid attack of oilwell cement exposed to carbonated brine

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Jan 2018Embargo end date: 01 Feb 2020 Spain Publisher:Elsevier BVJournal:International Journal of Greenhouse Gas Control, volume 68, pages 191-202 (issn: 1750-5836,

Authors: Liaudat, Joaquín; Martínez Estévez, Ariadna; López Garello, Carlos María; Carol, Ignacio;

doi: 10.1016/j.ijggc.2017.11.015

handle: 2117/114308

Modelling acid attack of oilwell cement exposed to carbonated brine

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Abstract

A diffusion-reaction model for the carbonation process of oilwell cement exposed to carbonated brine under CO2 geological storage conditions is presented. The formulation consists of two main diffusion/reaction field equations for the concentrations of aqueous calcium and carbon species in the pore solution of the hardened cement paste, complemented by two diffusion-only field equations for chloride and alkalis concentrations, and by a number of chemical kinetics and chemical equilibrium equations. The volume fraction distribution of the solid constituents of the hardened cement paste and the reaction products evolve with the progress of the reaction, determining the diffusivity properties of the material. The model is used to simulate experimental tests performed by Duguid and Scherer (2010), leading to promising results indicating that the fundamental aspects of the phenomenon are captured. Peer Reviewed

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Spain

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Keywords

Carbon sequestration, Carbonation Carbon sequestration Well cementCO2 carbonic acid Chemical model Finite Element Method, Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament d'emissions i olors, :Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament d'emissions i olors [Àrees temàtiques de la UPC], Anhídrid carbònic -- Aspectes ambientals, 624

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	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	20
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