Diffusion-reaction modelling of the degradation of oil-well cement exposed to carbonated brine
Document typeConference report
Rights accessOpen Access
The essential aspects of a diffusion-reaction model in development for the degradation process of oil-well cement exposed to carbonated brine are presented in this paper. The formulation consists of two main diffusion/reaction field equations for the concentrations of aqueous calcium and carbon species in the hardened cement paste pore solution, complemented 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. A sensitivity analysis of some parameters of the model is presented to illustrate the capabilities to reproduce realistically some aspects of the degradation process.
CitationMartinez, A., Liaudat, J., Lopez, C., Carol, I. Diffusion-reaction modelling of the degradation of oil-well cement exposed to carbonated brine. A: International Conference on Computational Plasticity. "Computational Plasticity XIV: Fundamentals and Applications: proceedings of the XIVInternational Conference on Computational Plasticity: Fundamentals and Applications, held in Barcelona, Spain 5-7September 2017". 2017, p. 625-635.