Experimental and modeling study of calcium carbonate precipitation and its effects on the degradation of oil well cement during carbonated brine exposure

Journal Article · Wed Jul 18 00:00:00 EDT 2018 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2018.03.016· OSTI ID:1467386

Matteo, Edward N. ^[1]; Huet, Bruno ^[2]; Jové-Colón, Carlos F. ^[3]; Scherer, George W. ^[4]

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1. Princeton Univ., Princeton, NJ (United States). Dept. of Chemical Engineering; Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Nuclear Waste Disposal Research and Analysis
2. LafargeHolcim R&D, Saint-Quentin-Fallavier (France)
3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Nuclear Waste Disposal Research and Analysis
4. Princeton Univ., Princeton, NJ (United States). Dept. of Civil & Environmental Engineering

Decalcification of cement in solutions of carbonated brine is important to a host of engineering applications, especially in subsurface service environments where cementitious materials are frequently utilized as engineered barriers for wellbore seals, as well as shaft and drift seals and waste forms for nuclear waste disposal. Analysis of leaching simulations and experiments shows that, depending on solution compositions (dissolved CO₂ concentration, pH, Ca ion concentration), calcite precipitation occurring during leaching of cement in contact with carbonated brine can have a significant impact on cement reactivity, in some instances leading to complete arrest of reactivity via calcium carbonate “pore-clogging”. In this paper, we present modeling and experimental results that examine the range of solution conditions that can lead to pore-clogging. Finally, analysis of the results shows that distinct regimes of leaching behavior, based on pH and pCO2, can be used to form a framework to better understand the occurrence of pore-clogging.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Princeton Univ., Princeton, NJ (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); SNL Laboratory Directed Research and Development (LDRD) Program; Ford Motor Company (United States); BP (United Kingdom)
• Grant/Contract Number: NA0003525
• OSTI ID: 1467386
• Alternate ID(s): OSTI ID: 22806532; OSTI ID: 1698069; OSTI ID: 1478377
• Report Number(s): SAND--2018-4766J; 662802
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Vol. 113; ISSN 0008-8846
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CaCO3
SEM
diffusion
durability
modeling
oil well cement