Keywords and Phrases
Drilling fluid contamination; Fly ash class C based geopolymer
"Cementing is one of the most critical steps in the drilling and completion of oil wells. Traditionally, Portland cement is used for oil cementing operations; however, geopolymer materials have recently attracted much attention because they are more cost-effective and have less environmental impacts.
An intensive laboratory work was conducted to obtain a new formulation of fly ash class C based geopolymer cement to be used as a potential alternative cementing material to Portland cement in oil and gas cementing. Twenty-four variations of fly ash class C based geopolymers were prepared, and by comparing several of their properties using API standard tests, the optimum geopolymer formulation was determined. The selection of the optimum formulation was based on five different tests, including rheology, density, compressive strength, and fluid loss. Further tests were performed for optimized geopolymer, including stability tests. Then, a comparison between the optimum mix design and Portland cement was done using the same tests.
One of the main issues regarding oil well cementing is drilling fluids' contamination. This research also investigates the effect of drilling fluid contamination with geopolymer cement to understand its impact on geopolymer rheological and mechanical performance. After geopolymer optimum design was selected, the slurries were mixed with 0, 5, and 10 weight percent drilling fluid ratio to determine the effects of drilling fluids on geopolymer properties using rheology, density, fluid-loss, and compressive strength tests. Results showed that geopolymer had better performance compared to Portland cement in the presence of drilling fluid contaminations, where geopolymer exhibited higher compressive strength compared to Portland cement"--Abstract, page iv.
Geosciences and Geological and Petroleum Engineering
M.S. in Petroleum Engineering
Missouri University of Science and Technology
Journal article titles appearing in thesis/dissertation
- New formulation of fly ash class C based geopolymer for oil well cementing
- Investigating rheological and mechanical performance of geopolymer cement in presence of water based drilling fluid
xvii, 120 pages
© 2018 Mohamed Saad Ahdaya, All rights reserved.
Thesis - Open Access
Electronic OCLC #
Ahdaya, Mohamed Saad, "The development of a new formulation of fly ash class C based geopolymer and assessing its performance in presence of drilling fluid contamination" (2018). Masters Theses. 7816.