Effects of the Storage of CO(2) on Multiaxial Mechanical and Hydraulic Behaviors of Oil-Well Cement

• Published in: Journal of Materials in Civil Engineering
• Main Authors: Takla, Issam, Burlion, Nicolas, Shao, Jian-Fu, Saint-Marc, Jérémie, Garnier, André
• Other Authors: Laboratoire de Mécanique de Lille - FRE 3723 (LML), Université de Lille, Sciences et Technologies-Centrale Lille-Centre National de la Recherche Scientifique (CNRS), Centre scientifique et Technique Jean Feger (CSTJF), TOTAL FINA ELF
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2011
• Subjects: Oil-well cement; Carbonation; Strength; Permeability; Temperature; Carbonic acid
• Online Access: https://hal.archives-ouvertes.fr/hal-00610290; https://doi.org/10.1061/(ASCE)MT.1943-5533.0000174

International audience The storage of CO(2) is an expected solution by the oil industry: using petroleum wells as geological reservoirs is a very important and new research field. The durability of such storage has an importance to be predicted. The carbonation of oil-well cement (Class G type) under temperature (90 degrees C) is evaluated in this paper. In the first part of the paper, the fabrication protocol for samples is explained, and the test conditions are described. The evolution of cement carbonation over time is then presented. In the second part of the paper, the results obtained by triaxial mechanical tests with permeability measurements at 90 degrees C are discussed. Mechanical evolutions obtained for different confinement pressures show a remarkable decrease in permeability and an important increase of multiaxial strengths, which may exceed 100%. Long-term tests of carbonation will be necessary to evaluate the effect of carbonic acid on the chemical stability of carbonated cement.