Durability of Oilwell Cement in CO2-rich Environments

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The anthropogenic emissions of carbon dioxide (CO2) into the atmosphere is considered as one of the main reasons for global warming. The injection of CO2 into underground formations is an immediate to mid-term option to decrease the level of this gas in the atmosphere. Depleted oil and gas reservoirs are among the best candidates for the carbon capture and storage projects (CCS). The reason for this is based on the well-characterised structure of these type of underground formations through the different periods of their life. One of the most concerned problems associated with CCS projects is CO2 leakage through well cements. Oilwell cements exposed to CO2-bearing fluids undergo geomechanical and geochemical changes which may endanger their integrity. This paper aims at providing a framework to predict the lifespan of a cement exposed to CO2-bearing fluid using numerical modelling based on coupling geochemical and geomechanical processes. The main processes of the radial compaction and the radial cracking are investigated. It was shown that the radial cracking process leads to a definite lifespan of the cement matrix after being exposed to CO2–bearing fluids, while the radial compaction process can increase the durability of the cement matrix. Generally, this process becomes more effective with increasing the radial stress on the cement sheath from the surrounding rocks.
Original languageEnglish
Title of host publicationFifth International Conference on Sustainable Construction Materials and Technologies (SCMT5)
EditorsEshmaiel Ganjian, Mukesh Limbachiya, Nader Ghafoori, Peter Claisse, Mohammadreza Bagheri
PublisherInternational Committee of the SCMT conferences
Number of pages15
ISBN (Print)978-1078314435
Publication statusPublished - 15 Jul 2019
EventFifth International Conference on Sustainable Construction Materials and Technologies - Kingston upon Thames, United Kingdom
Duration: 14 Jul 201917 Jul 2019
Conference number: 5

Publication series

NameSustainable Construction Materials and Technologies
ISSN (Print)2515-3048


ConferenceFifth International Conference on Sustainable Construction Materials and Technologies
Abbreviated titleSCMT5
CountryUnited Kingdom
CityKingston upon Thames
Internet address


  • Cement lifespan
  • Co storage
  • Oilwell cement

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Materials Science(all)

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