Understanding CO2-brine-wellbore Cement-rock Interactions for CO2 Storage

Nazia Mubeen Farooqui, Qi Liu, M. Mercedes Maroto-Valer, Mojgan Hadi Mosleh, Anna Korre, Sevket Durucan

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Abstract

There is a need to improve our understanding of wellbore integrity by conducting investigations into the flow, geomechanical and geochemical properties of cement and reservoir rocks under conditions representative of subsurface temperatures and pressures at the wellbore. A series of composite cement-host rock core samples were prepared and subjected to baseline flow and mechanical properties testing to determine porosity, permeability, strength and elastic properties. The hydrothermal experiments conducted have shown that variations in the solution profiles of Ca, Mg, and Fe were due to the dissolution of CO2 for all sets of samples. The dissolution of muscovite and montmorillonite from the composite core samples resulted in increasing concentrations of Na, K and S.

Original languageEnglish
Pages (from-to)5206-5211
Number of pages6
JournalEnergy Procedia
Volume114
DOIs
Publication statusPublished - 1 Jul 2017

Keywords

  • caprock
  • cement degradation
  • CO-brine-cement-rock interaction
  • Well integrity

ASJC Scopus subject areas

  • Energy(all)

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