A new polymer nanocomposite repair material for restoring wellbore seal integrity

Genedy, Moneeb; Kandil, Usama F.; Matteo, Edward N.; Stormont, John; Reda Taha, Mahmoud M.

doi:10.1016/j.ijggc.2016.10.006

Title: A new polymer nanocomposite repair material for restoring wellbore seal integrity

Journal Article · Wed Mar 01 00:00:00 EST 2017 · International Journal of Greenhouse Gas Control

DOI:https://doi.org/10.1016/j.ijggc.2016.10.006· OSTI ID:1340244

Genedy, Moneeb; Kandil, Usama F.; Matteo, Edward N.; Stormont, John; Reda Taha, Mahmoud M.

Seal integrity of functional oil wells and abandoned wellbores used for CO₂ subsequent storage has become of significant interest with the oil and gas leaks worldwide. This is attributed to the fact that wellbores intersecting geographical formations contain potential leakage pathways. One of the critical leakage pathways is the cement-shale interface. In this study, we examine the efficiency of a new polymer nanocomposite repair material that can be injected for sealing micro annulus in wellbores. The bond strength and microstructure of the interface of Type G oil well cement (reference), microfine cement, Novolac epoxy incorporating Neat, 0.25%, 0.5%, and 1.0% Aluminum Nanoparticles (ANPs) with shale is investigated. Interfacial bond strength testing shows that injected microfine cement repair has considerably low bond strength, while ANPs-epoxy nanocomposites have a bond strength that is an order of magnitude higher than cement. Microscopic investigations of the interface show that micro annulus interfacial cracks with widths up to 40 μm were observed at the cement-shale interface while these cracks were absent at the cement-epoxy-shale interface. Finally, Fourier Transform Infrared and Dynamic mechanical analysis measurements showed that ANPs improve interfacial bond by limiting epoxy crosslinking, and therefore allowing epoxy to form robust bonds with cement and shale.

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Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE); USDOE National Nuclear Security Administration (NNSA)

Contributing Organization:: Egyptian Petroleum Research Inst. (EPRI), Cairo (Egypt)

Grant/Contract Number:: AC04-94AL85000; FE0009562; DEFE0009562

OSTI ID:: 1340244

Alternate ID(s):: OSTI ID: 1413058

Report Number(s):: SAND2016-4031J; 639039

Journal Information:: International Journal of Greenhouse Gas Control, Vol. 58, Issue C; ISSN 1750-5836

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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Preparation and Sealing Performance of a New Coal Dust Polymer Composite Sealing Material Li, Bo; Zhang, Junxiang; Wei, Jianping Advances in Materials Science and Engineering, Vol. 2018 https://doi.org/10.1155/2018/8480913	journal	August 2018

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