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Title: Advances in Geological CO{sub 2} Sequestration and Co-Sequestration with O{sub 2}

Abstract

The injection of CO{sub 2} for Enhanced Oil Recovery (EOR) and sequestration in brine-bearing formations for long term storage has been in practice or under investigation in many locations globally. This study focused on the assessment of cement wellbore seal integrity in CO{sub 2}- and CO{sub 2}-O{sub 2}-saturated brine and supercritical CO{sub 2} environments. Brine chemistries (NaCl, MgCl{sub 2}, CaCl{sub 2}) at various saline concentrations were investigated at a pressure of 28.9 MPa (4200 psi) at both 50{degree}C and 85{degree}C. These parameters were selected to simulate downhole conditions at several potential CO{sub 2} injection sites in the United States. Class H portland cement is not thermodynamically stable under these conditions and the formation of carbonic acid degrades the cement. Dissociation occurs and leaches cations, forming a CaCO{sub 3} buffered zone, amorphous silica, and other secondary minerals. Increased temperature affected the structure of C-S-H and the hydration of the cement leading to higher degradation rates.

Authors:
; ;
Publication Date:
Research Org.:
National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1061298
DOE Contract Number:  
NETL-PUB 289
Resource Type:
Conference
Resource Relation:
Conference: ACI-CANMET Conference, Prague, Czechoslovakia, October, 2012.
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Carbon sequestration, oil-well cement, oxy-fuel combustion, secondary ettringite formation

Citation Formats

Verba, Circe A, O'Connor, William K., and Ideker, J.H. Advances in Geological CO{sub 2} Sequestration and Co-Sequestration with O{sub 2}. United States: N. p., 2012. Web.
Verba, Circe A, O'Connor, William K., & Ideker, J.H. Advances in Geological CO{sub 2} Sequestration and Co-Sequestration with O{sub 2}. United States.
Verba, Circe A, O'Connor, William K., and Ideker, J.H. Sun . "Advances in Geological CO{sub 2} Sequestration and Co-Sequestration with O{sub 2}". United States. https://www.osti.gov/servlets/purl/1061298.
@article{osti_1061298,
title = {Advances in Geological CO{sub 2} Sequestration and Co-Sequestration with O{sub 2}},
author = {Verba, Circe A and O'Connor, William K. and Ideker, J.H.},
abstractNote = {The injection of CO{sub 2} for Enhanced Oil Recovery (EOR) and sequestration in brine-bearing formations for long term storage has been in practice or under investigation in many locations globally. This study focused on the assessment of cement wellbore seal integrity in CO{sub 2}- and CO{sub 2}-O{sub 2}-saturated brine and supercritical CO{sub 2} environments. Brine chemistries (NaCl, MgCl{sub 2}, CaCl{sub 2}) at various saline concentrations were investigated at a pressure of 28.9 MPa (4200 psi) at both 50{degree}C and 85{degree}C. These parameters were selected to simulate downhole conditions at several potential CO{sub 2} injection sites in the United States. Class H portland cement is not thermodynamically stable under these conditions and the formation of carbonic acid degrades the cement. Dissociation occurs and leaches cations, forming a CaCO{sub 3} buffered zone, amorphous silica, and other secondary minerals. Increased temperature affected the structure of C-S-H and the hydration of the cement leading to higher degradation rates.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {10}
}

Conference:
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