Wellbore cement degradation in contact zone with formation rock
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F16%3A86097445" target="_blank" >RIV/61989100:27350/16:86097445 - isvavai.cz</a>
Result on the web
<a href="http://link.springer.com/article/10.1007/s12665-015-5114-z" target="_blank" >http://link.springer.com/article/10.1007/s12665-015-5114-z</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s12665-015-5114-z" target="_blank" >10.1007/s12665-015-5114-z</a>
Alternative languages
Result language
angličtina
Original language name
Wellbore cement degradation in contact zone with formation rock
Original language description
In the work the risk of CO2 migration in deep wells, caused by integrity loss on cement-rock interface and thow wellbore integrity correlated with the formation rock lithology were determined. 19 composed samples of rock and wellbore cement were exposed to CO2-saturated brine, in the autoclave reactor, under the formation conditions (50 degrees C and 10 MPa). Mineralogical and textural changes in the cement-rock interface in the case of selected rocks (sandstones, shale, limestones, dolomites and anhydrites) were characterised. The performed examination indicates that both cement and formation rocks react with CO2 saturated brine under the experimental conditions. The cement alteration is characterised by carbonation process in the outer rim, but it is enhanced on the interface with formation rock. It was stated that the performance of the cement-rock interface is essentially dependent on the rock lithology, including mineral composition and rock structure. Some minerals are very easily dissolving, e.g., anhydrite, gypsum, calcite and feldspars, what is contributing to an increase in the porosity and permeability in cement-rock contact zone. Primary dissolution of certain minerals in the first stages of the experiment results in the secondary precipitation after the last stage of reaction contributing to a secondary reduction of pore space.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DH - Mining industry including coal mining and processing
OECD FORD branch
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Result continuities
Project
<a href="/en/project/LO1406" target="_blank" >LO1406: Institute of clean technologies for mining and utilization of raw materials for energy use -Sustainability program</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Environmental Earth Sciences
ISSN
1866-6280
e-ISSN
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Volume of the periodical
75
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
498-513
UT code for WoS article
000372251000050
EID of the result in the Scopus database
2-s2.0-84961160025