NDLI: Evaluation of mechanical well integrity during CO$

Content Provider	Springer Nature Link
Author	Bai, Mingxing Sun, Jianpeng Song, Kaoping Reinicke, Kurt M. Teodoriu, Catalin
Copyright Year	2015
Abstract	The storage of CO$_{2}$ in depleted oil and gas reservoirs, coal seams or saline aquifers is an important means considered to contribute to the mitigation of the greenhouse effect on the environment. In CO$_{2}$ underground storage projects, well integrity is a crucial factor that must be demonstrated for all wells, accessible and abandoned, affected by the injected CO$_{2}$ to ensure safety during the injection and storage of CO$_{2}$. Field experience and laboratory experiments have shown that chemical degradation due to CO$_{2}$ can affect well integrity severely only when there are existing pathways in the casing-cement-rock composite system. Therefore, the study of mechanical well integrity is of paramount significance. In this paper, analytical and numerical models are developed to assess well conditions including the micro-annulus between the cement sheath and the casing due to downhole condition changes. The parametric study shows that cement with a low Young’s modulus and high Poisson ratio has smaller micro-annulus than that with a high Young’s modulus and low Poisson ratio. When temperature and pressure decrease there is a potential for debonding of the interface between casing and cement.
Starting Page	6815
Ending Page	6825
Page Count	11
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	73
Issue Number	11
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-02-14
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	CO$_{2}$ underground storage Well integrity Micro-annulus Downhole condition changes Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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