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Determining the Limitations of Class F Fly Ash Compared to Class G Cement In Hydrocarbon Wells Application
Cement is a material commonly used in multiple applications in different industries. Among the industries that uses cement is the oil and gas industry. API (American Petroleum Institute) Class G cement that is the most incorporated form of cement used in the cementation of oil and gas wells to provi...
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2025
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| access_status_str | Open Access |
| author | Helmy, Youssef |
| author_browse | Helmy, Youssef |
| author_facet | Helmy, Youssef |
| author_sort | Helmy, Youssef |
| collection | Thesis |
| description | Cement is a material commonly used in multiple applications in different industries. Among the industries that uses cement is the oil and gas industry. API (American Petroleum Institute) Class G cement that is the most incorporated form of cement used in the cementation of oil and gas wells to provide several forms of protection and stabilization for the casings. However, Class G cement is contested in terms of efficiency, costs, and environmental awareness against Class F fly ash geopolymers by researchers. This research aims to explore the potential limitations that fly ash geopolymer might have for its use in the oil and gas industry for cementing wells. A background study was conducted on both materials with functional batches formulated from workable ratios and concentrations, materials, and procedures according to the findings and methodologies of other researchers. The working sample batches were then experimented on to test their performances in water retention, durability, structural integrity, thickening time, pumpability, compressive strength, and reactions at different temperatures, pressures, and chemical conditions. The results showed that the geopolymer generally retained more water, was more durable and showed increased strength with temperature, water, and curing time than Class G cement. However, Class F fly ash limits geopolymers from industrial usage due to its inconsistent aluminosilicate compositions, its thickening time, and lack of information on its reactions with various drilling fluids. Class G retains higher compressive strength and requires less complexity in adjusting it with additives. The geopolymer may be limited for use to surface and intermediate casings and even used in two stage cementing using a diverter, but only at depths away from the production zone and substances such as HCl. |
| format | Thesis |
| id | oai:fount.aucegypt.edu:etds-3421 |
| institution | American University in Cairo (Egypt) |
| last_indexed | 2026-06-10T12:35:55.364Z |
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| provenance_str_mv | Harvested via OAI-PMH from AUC Knowledge Fountain — bepress |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | AUC Knowledge Fountain |
| publisherStr | AUC Knowledge Fountain |
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| source_str | AUC Knowledge Fountain — bepress |
| spelling | oai:fount.aucegypt.edu:etds-3421 Determining the Limitations of Class F Fly Ash Compared to Class G Cement In Hydrocarbon Wells Application Helmy, Youssef Cement is a material commonly used in multiple applications in different industries. Among the industries that uses cement is the oil and gas industry. API (American Petroleum Institute) Class G cement that is the most incorporated form of cement used in the cementation of oil and gas wells to provide several forms of protection and stabilization for the casings. However, Class G cement is contested in terms of efficiency, costs, and environmental awareness against Class F fly ash geopolymers by researchers. This research aims to explore the potential limitations that fly ash geopolymer might have for its use in the oil and gas industry for cementing wells. A background study was conducted on both materials with functional batches formulated from workable ratios and concentrations, materials, and procedures according to the findings and methodologies of other researchers. The working sample batches were then experimented on to test their performances in water retention, durability, structural integrity, thickening time, pumpability, compressive strength, and reactions at different temperatures, pressures, and chemical conditions. The results showed that the geopolymer generally retained more water, was more durable and showed increased strength with temperature, water, and curing time than Class G cement. However, Class F fly ash limits geopolymers from industrial usage due to its inconsistent aluminosilicate compositions, its thickening time, and lack of information on its reactions with various drilling fluids. Class G retains higher compressive strength and requires less complexity in adjusting it with additives. The geopolymer may be limited for use to surface and intermediate casings and even used in two stage cementing using a diverter, but only at depths away from the production zone and substances such as HCl. 2025-02-19T08:00:00Z thesis application/pdf https://fount.aucegypt.edu/etds/2377 https://fount.aucegypt.edu/context/etds/article/3421/viewcontent/Youssef_Helmy_Thesis_Defence_Report_FINAL_DRAFT.pdf Theses and Dissertations AUC Knowledge Fountain Geopolymer Cement Fly Ash Sodium Metasilicate Petroleum Engineering Polymer and Organic Materials |
| spellingShingle | Geopolymer Cement Fly Ash Sodium Metasilicate Petroleum Engineering Polymer and Organic Materials Helmy, Youssef Determining the Limitations of Class F Fly Ash Compared to Class G Cement In Hydrocarbon Wells Application |
| title | Determining the Limitations of Class F Fly Ash Compared to Class G Cement In Hydrocarbon Wells Application |
| title_full | Determining the Limitations of Class F Fly Ash Compared to Class G Cement In Hydrocarbon Wells Application |
| title_fullStr | Determining the Limitations of Class F Fly Ash Compared to Class G Cement In Hydrocarbon Wells Application |
| title_full_unstemmed | Determining the Limitations of Class F Fly Ash Compared to Class G Cement In Hydrocarbon Wells Application |
| title_short | Determining the Limitations of Class F Fly Ash Compared to Class G Cement In Hydrocarbon Wells Application |
| title_sort | determining the limitations of class f fly ash compared to class g cement in hydrocarbon wells application |
| topic | Geopolymer Cement Fly Ash Sodium Metasilicate Petroleum Engineering Polymer and Organic Materials |
| url | https://fount.aucegypt.edu/etds/2377 https://fount.aucegypt.edu/context/etds/article/3421/viewcontent/Youssef_Helmy_Thesis_Defence_Report_FINAL_DRAFT.pdf |
| work_keys_str_mv | AT helmyyoussef determiningthelimitationsofclassfflyashcomparedtoclassgcementinhydrocarbonwellsapplication |