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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium REWAS 2022: Energy Technologies and CO2 Management
Presentation Title Geomimicry Inspired MicroNano Concrete as Subsurface Hydraulic Barrier Materials: Learning from Shale Rocks as Best Geological Seals
Author(s) Cody Massion, Vamsi S.K. Vissa, Yunxing Lu, Dustin Crandall, Andrew Bunger, Mileva Radonjic
On-Site Speaker (Planned) Mileva Radonjic
Abstract Scope Wellbore cement is the primary hydraulic barrier material used in wellbore construction, with properties similar to the formation rock. It serves multiple purposes such as providing mechanical support, zonal isolation, maintaining well performance, and finally restoring sealing barriers during the wellbore abandonment. Clay rich shale rocks are phenomenal sealing materials, and often exist in extensive lateral dimensions with variable thickness and in multilayered structures. Unlike clay dominated shale that resists fracturing, Portland cement has a brittle nature and is subject to mechanical failure at downhole conditions of HTHP. Three materials are explored as additives: olivine to prevent chemical attack from CO2 rich geofluids; zeolite for its water storage and slow moisture release that can potentially prevent drying shrinkage, allow secondary cement hydration, and promote self-healing capabilities; graphene to enhanced mechanical properties. In this study we investigate the mechanism for how each of these micro-nano aggregates contributes to cement matrix performance.
Proceedings Inclusion? Planned:
Keywords Composites, Other, Other


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