Targeted Mineral Carbonation to Enhance Wellbore Integrity

 

Figure 1: Schematic cross section of a<br/>plugged wellbore illustrating potential<br/>leakage pathways through: a) casing<br/>and cement; b) the cement pore space<br/>as a result of cement degradation; and c) cement and rock.
Figure 1: Schematic cross section of a
plugged wellbore illustrating potential
leakage pathways through: a) casing
and cement; b) the cement pore space
as a result of cement degradation; and c) cement and rock.
Performer: 
Rector & Visitors of the University of Virginia
Website:  University of Virginia
Award Number:  FE0026582
Project Duration:  10/01/2015 – 12/31/2018
Total Award Value:  $807,236
DOE Share:  $640,000
Performer Share:  $167,236
Technology Area:  Geologic Storage
Key Technology: 
Location:  Charlottesville, Virginia

Project Description

The project will systematically evaluate the potential to deploy targeted carbonation reactions to the leading edge of leaking CO2 as a strategy for mitigating leakage from deep CO2 injection sites. This project focuses on the development of stimuli-responsive coated mineral silicates that can be used in the targeted treatment and remediation of leaking CO2 in geologic storage sites and wellbores (Figure 1). This self-targeted approach eliminates the need for leaks to be precisely located before they can be mitigated, thus improving confidence in containment. Specifically, this project will synthesize coated mineral silicates and evaluate their ability to mitigate leakage experimentally and with forward modeling.

Project Benefits

This coupled experimental and modeling study is advancing the knowledge of how carbonate-based dissolution-precipitation reactions impact fundamental chemical and physical properties in sandstones, shales, and in concrete. The outcomes of this effort could be enabling for other related strategies for targeted control of fluid flow in the subsurface using smart materials. The technology development is expected to reduce safety and economic risks associated with geologic CO2 storage by enabling remediation of detected leaks in complicated environments under a variety of pressure, temperature, and chemical conditions to ensure CO2 permanence within the storage formation.

Contact Information

Federal Project Manager 
Mary Rice: mary.rice@netl.doe.gov
Technology Manager 
Traci Rodosta: traci.rodosta@netl.doe.gov
Principal Investigator 
Dr. Andres Clarens: aclarens@virginia.edu
 

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