Cristin-resultat-ID: 2052268
Sist endret: 15. november 2022, 14:03
NVI-rapporteringsår: 2022
Resultat
Vitenskapelig artikkel
2022

Triaxial behavior of a stabilized and a highly porous oil well cement paste at different saturation and drainage conditions

Bidragsytere:
  • Victor Nogueira Lima
  • Hans Joakim Skadsem
  • Katherine Beltrán-Jiménez
  • Alexandr Zhemchuzhnikov
  • Raquel Quadros Velloso og
  • Flavio de Andrade Silva

Tidsskrift

Journal of Petroleum Science and Engineering
ISSN 0920-4105
e-ISSN 1873-4715
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2022
Publisert online: 2022
Volum: 219

Importkilder

Scopus-ID: 2-s2.0-85138338465

Beskrivelse Beskrivelse

Tittel

Triaxial behavior of a stabilized and a highly porous oil well cement paste at different saturation and drainage conditions

Sammendrag

Well cement is the most common barrier material in wells for geothermal and hydrocarbon production. As cements are exposed to hydrostatic loads and periods of deviatoric loading in wellbore environments, it is important to understand the mechanical behavior of cement under relevant conditions. We study effects of porosity, saturation, confining pressure and drainage conditions on the mechanical behavior of class G well cement using two basic formulations, one which produces a highly porous cement paste. The high-porosity cement exhibited lower strength and reduced elastic moduli compared to the stabilized formulation. The elastic moduli for both formulations were reduced with increasing confining pressure, and the most pronounced effect of confinement was increased ductility and pronounced strain hardening behavior of the two cements, likely due to compaction. Under saturated and undrained conditions, the stabilized cement exhibited an increase in stiffness and essentially brittle failure even at 20 MPa confining pressure. The porous cement showed less sensitivity to drainage conditions. We attribute this observation to possible generation of internal micro-cracks and dislocations instead of a macroscopic failure plane. The results contribute to increased understanding of the mechanical response of conventional and porous cements under relevant confining pressures and different saturation and drainage conditions.

Bidragsytere

Victor Nogueira Lima

  • Tilknyttet:
    Forfatter
    ved Pontifícia Universidade Católica do Rio de Janeiro

Hans Joakim Skadsem

  • Tilknyttet:
    Forfatter
    ved NORCE Energi og teknologi ved NORCE Norwegian Research Centre AS
  • Tilknyttet:
    Forfatter
    ved Institutt for energi- og petroleumsteknologi ved Universitetet i Stavanger

Katherine Beltrán-Jiménez

  • Tilknyttet:
    Forfatter
    ved NORCE Energi og teknologi ved NORCE Norwegian Research Centre AS

Alexandr Zhemchuzhnikov

  • Tilknyttet:
    Forfatter
    ved Pontifícia Universidade Católica do Rio de Janeiro

Raquel Quadros Velloso

  • Tilknyttet:
    Forfatter
    ved Pontifícia Universidade Católica do Rio de Janeiro
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