TY - JOUR
T1 - Permeability and elastic properties assessment of alumina nanofiber (ANF) cementitious composites under simulated wellbore cyclic pressure
AU - McElroy, Phillip D.
AU - Emadi, Hossein
AU - Unruh, Daniel
N1 - Publisher Copyright:
© 2019
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2020/4/10
Y1 - 2020/4/10
N2 - Highly dispersed Alumina Nanofibers (ANF's) were utilized in oil well cement class “H” to investigate effects of ANF's on the cement's mechanical and microstructural properties under simulated wellbore conditions. Cement composites consisted of a reference (Ref) sample containing no ANF's and three additional formulations with 0.1%, 0.2%, and 0.3% ANF's by weight of cement (BWOC) incorporated in cement formulations with various common additives. The provided producing liquid dispersion methodology was assessed using a Transmission Electron Microscope (TEM) with each composite formulation undergoing permeability and elastic property testing under simulated cyclic confining wellbore pressures. The compressive strength was also measured along with a microstructural assessment. The microstructural assessment consisted of measuring the formation of hydration products using an X-ray diffractogram (XRD) and thermogravimetric analyzer (TGA). The results indicate that 0.1% of ANF provides the greatest increase in mechanical properties and possesses the lowest permeability through all pressure cycles. Additionally, the amount of Calcium Silicate Hydrate (C-S-H) and Degree of Hydration (DOH) was maximized for 0.1% ANF compared to other composite formulations.
AB - Highly dispersed Alumina Nanofibers (ANF's) were utilized in oil well cement class “H” to investigate effects of ANF's on the cement's mechanical and microstructural properties under simulated wellbore conditions. Cement composites consisted of a reference (Ref) sample containing no ANF's and three additional formulations with 0.1%, 0.2%, and 0.3% ANF's by weight of cement (BWOC) incorporated in cement formulations with various common additives. The provided producing liquid dispersion methodology was assessed using a Transmission Electron Microscope (TEM) with each composite formulation undergoing permeability and elastic property testing under simulated cyclic confining wellbore pressures. The compressive strength was also measured along with a microstructural assessment. The microstructural assessment consisted of measuring the formation of hydration products using an X-ray diffractogram (XRD) and thermogravimetric analyzer (TGA). The results indicate that 0.1% of ANF provides the greatest increase in mechanical properties and possesses the lowest permeability through all pressure cycles. Additionally, the amount of Calcium Silicate Hydrate (C-S-H) and Degree of Hydration (DOH) was maximized for 0.1% ANF compared to other composite formulations.
KW - Alumina nanofiber (ANF)
KW - Chemically bound water (CBW)
KW - Degree of hydration (DOH)
KW - Elastic properties
UR - http://www.scopus.com/inward/record.url?scp=85076679391&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2019.117867
DO - 10.1016/j.conbuildmat.2019.117867
M3 - Article
AN - SCOPUS:85076679391
VL - 239
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 117867
ER -