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Phase Evolution of Oil Well Cements with Nano-Additive at Elevated Temperature/Pressure

Siwei Ma; Tony Yu; Yanbin Wang; Mohend Chaouche; Shiho Kawashima

Title:
Phase Evolution of Oil Well Cements with Nano-Additive at Elevated Temperature/Pressure
Author(s):
Ma, Siwei
Yu, Tony
Wang, Yanbin
Chaouche, Mohend
Kawashima, Shiho
Date:
Department(s):
Civil Engineering and Engineering Mechanics
Volume:
113
Persistent URL:
Book/Journal Title:
ACI Materials Journal
Publisher:
American Concrete Institute
Abstract:
Phase characterization of Class A oil well cement slurries was performed through synchrotron X-ray diffraction technique. This allowed for real-time, in-place measurements of X-ray diffraction patterns to be obtained and, subsequently, the continuous formation and decomposition of select phases over time (up to 8 hours). Phases of interest included alite, ferrite, portlandite, ettringite, monosulfate, and jaffeite (crystalline form of calcium silicate hydrate). The effects of elevated temperatures (140, 185, and 300°F [60, 85, and 149°C]) at elevated pressure (up to approximately 15 ksi [100 MPa]), as well as the effect of nanomaterial addition were investigated. Rate of conversion of ettringite to monosulfate increased with increasing temperature, and monosulfate became unstable when temperatures reached 185°F (85°C). The results of synchrotron X-ray diffraction provided evidence of a seeding effect introduced by nano-sized attapulgite clays at 0.5% addition by mass of cement, where acceleration in the rate of formation of portlandite and jaffeite was observed. This was supported by isothermal calorimetry results.
Subject(s):
Materials at high pressures
Materials at high temperatures
Nanostructured materials
Cement slurry
Civil engineering
Publisher DOI:
https://doi.org/10.14359/51689104
Item views
92
Metadata:
text | xml
Suggested Citation:
Siwei Ma, Tony Yu, Yanbin Wang, Mohend Chaouche, Shiho Kawashima, , Phase Evolution of Oil Well Cements with Nano-Additive at Elevated Temperature/Pressure, Columbia University Academic Commons, .

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