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Title: Geochemical narrowing of cement fracture aperture during multiphase flow of supercritical CO2 and brine

Abstract

For carbon capture and storage operations, wells are used as a necessary conduit for injecting CO2 at depth, but they can also act as leakage conduits if the cement seals are compromised. The specific objective of this research was to investigate the nature of self-healing of a fracture within cement under multiphase flow of CO2 and brine, and to compare this to a newly developed model. This was accomplished through a laboratory investigation, flowing reacting supercritical CO2 and brine through a cement fracture with multiphase flow. The influent end of the fracture was degraded as evidenced by the formation of cracks across the surface. At the effluent end of the fracture, the initial aperture of 137 µm was reduced to 50 µm. This reduction by 87 µm was similar to results from a recently developed model tested in this study, which predicted an aperture reduction of 80 µm. Our results demonstrated that the model accurately predicted the reactions which occurred in this multiphase flow system.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1]
  1. BATTELLE (PACIFIC NW LAB)
  2. Lawrence Livermore National Laboratory
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1597637
Report Number(s):
PNNL-SA-144527
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
International Journal of Greenhouse Gas Control
Additional Journal Information:
Journal Volume: 95
Country of Publication:
United States
Language:
English
Subject:
wellbore, cement, fracture, multiphase-flow, supercritical-CO2, brine

Citation Formats

Rod, Kenton A., Iyer, Jaisree K., Lonergan, Charmayne E., Varga, Tamas, Cantrell, Kirk J., and Reno, Loren R. Geochemical narrowing of cement fracture aperture during multiphase flow of supercritical CO2 and brine. United States: N. p., 2020. Web. doi:10.1016/j.ijggc.2020.102978.
Rod, Kenton A., Iyer, Jaisree K., Lonergan, Charmayne E., Varga, Tamas, Cantrell, Kirk J., & Reno, Loren R. Geochemical narrowing of cement fracture aperture during multiphase flow of supercritical CO2 and brine. United States. doi:10.1016/j.ijggc.2020.102978.
Rod, Kenton A., Iyer, Jaisree K., Lonergan, Charmayne E., Varga, Tamas, Cantrell, Kirk J., and Reno, Loren R. Wed . "Geochemical narrowing of cement fracture aperture during multiphase flow of supercritical CO2 and brine". United States. doi:10.1016/j.ijggc.2020.102978.
@article{osti_1597637,
title = {Geochemical narrowing of cement fracture aperture during multiphase flow of supercritical CO2 and brine},
author = {Rod, Kenton A. and Iyer, Jaisree K. and Lonergan, Charmayne E. and Varga, Tamas and Cantrell, Kirk J. and Reno, Loren R.},
abstractNote = {For carbon capture and storage operations, wells are used as a necessary conduit for injecting CO2 at depth, but they can also act as leakage conduits if the cement seals are compromised. The specific objective of this research was to investigate the nature of self-healing of a fracture within cement under multiphase flow of CO2 and brine, and to compare this to a newly developed model. This was accomplished through a laboratory investigation, flowing reacting supercritical CO2 and brine through a cement fracture with multiphase flow. The influent end of the fracture was degraded as evidenced by the formation of cracks across the surface. At the effluent end of the fracture, the initial aperture of 137 µm was reduced to 50 µm. This reduction by 87 µm was similar to results from a recently developed model tested in this study, which predicted an aperture reduction of 80 µm. Our results demonstrated that the model accurately predicted the reactions which occurred in this multiphase flow system.},
doi = {10.1016/j.ijggc.2020.102978},
journal = {International Journal of Greenhouse Gas Control},
number = ,
volume = 95,
place = {United States},
year = {2020},
month = {4}
}