Preliminary modeling of CO2 injection at the Chester 16 reef system. Photo courtesy of ORNL FEAA-04 Task 1.
Wellbore Integrity Overview:
Wellbore integrity addresses the need to construct and assess wellbores to ensure safe and reliable injection operations, as well as long-term containment of carbon dioxide (CO2) in the storage complex. The United States Department of Energy (DOE) is supporting research to provide a better understanding of factors which impact wellbore integrity and improved methods for assessing integrity over the life of a storage project.
Wellbore Integrity research focuses on technologies to develop:
Improved systems for detection and remediation of CO2 leakage from wells and near-by natural pathways.
Advanced well construction materials for long-term wellbore integrity.
Autonomous completions for long-term assessment of well-bore integrity issues.
Advanced tools to ensure wellbore integrity in complex geologic settings.
Novel well-completion techniques to increase reservoir injectivity without compromising containment.
This includes the development of lower-cost tools with higher resolution, such as advanced seismic and tracer technologies for leak identification, and novel methods, such as "self-healing" or externally activated cements, nanocomposites, and other materials, for permanent mitigation of release pathways.