Journal
12TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-12
Volume 63, Issue -, Pages 5798-5807Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.egypro.2014.11.612
Keywords
Polymer cement; epoxy nanocomposites; bond strength; flowability; nanoalumina; nanoclay
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Thousands of abandoned wellbores may lie within the aerial extent of a CO2 storage operation. These wellbores represent a potential leakage pathway and a leaky wellbore needs to be re-completed or otherwise repaired to restore seal integrity and ensure containment of the stored CO2. Due to the high cost of recompleting a well, a sufficient economic incentive exists if a viable seal repair technology is available. In this paper, we examine the use of epoxy nanocomposites as potential seal repair materials that have excellent bond characteristics with both steel and cement when cured in the subsurface environment. Test results show Novolac epoxy nanocomposites incorporating nanosilica, nanoclay or nanoalumina to have acceptable flowability that enable injection in wellbore cracks and significantly higher bond strength compared with standard microfine cement. (C) 2014 The Authors. Published by Elsevier Ltd.
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