New Formulation of Fly Ash Class C Based Geopolymer for Oil Well Cementing
- Mohamed Saad Ahdaya (Missouri University of Science and Technology) | Abdulmohsin Imqam (Missouri University of Science and Technology) | Priyesh Jani (Missouri University of Science and Technology) | Sherif Fakher (Missouri University of Science and Technology) | Mohamed ElGawady (Missouri University of Science and Technology)
- Document ID
- International Petroleum Technology Conference
- International Petroleum Technology Conference, 26-28 March, Beijing, China
- Publication Date
- Document Type
- Conference Paper
- 2019. International Petroleum Technology Conference
- 1.6 Drilling Operations, 2.10 Well Integrity, 0.2.1 Wellbore integrity, 2.10 Well Integrity, 2.10.3 Zonal Isolation, 2.2 Installation and Completion Operations, 2 Well completion, 0.2 Wellbore Design
- Carbon dioxide emission, Geopolymer, Cement durability, Environmental
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One of the most important steps in drilling and operation completion is oil well cementing to provide wellbore integrity. Cementing is usually performed in the oil industry using conventional Portland cement. Even though Portland cement has been used for many years, it has several drawbacks, including operational failures and severe environmental impacts. Fly ash based geopolymer cement has been recently investigated as a low-cost, environmentally friendly alternative to Portland cement. This research develops a novel formulation of Class C fly ash based geopolymer and investigates its applicability as an alternative to Portland cement in hydrocarbon well 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 ratios of alkaline activator to fly ash that were used are 0.2, 0.4, and 0.8, along with different ratios of sodium silicate to sodium hydroxide, including 0.25, 0.5, 1, and 2. Multiple sodium hydroxide concentrations were used, including 5, 10, and 15 molarity. The selection of the optimum formulation was based on five different tests, including rheology, density, compressive strength, fluid loss test, and stability tests (sedimentation test and free fluid test). Then, a comparison between the optimum mix design and Portland cement was conducted using the same tests. Based on our results, increasing sodium hydroxide concentration resulted in an increase in compressive strength and showed a slight decrease in the plastic viscosity. However, increasing in the alkaline activator to fly ash ratios increased plastic viscosity, and thus the pumpability of the slurry was reduced. Increasing the sodium silicate to sodium hydroxide ratio significantly decreased the fluid loss. The optimum design of geopolymer, which had lower fluid loss, 93 ml after 30 minutes, sufficient compressive strength, 1195 psi, and an acceptable density, 14.7 lb/gal, and viscosity, 50 cp, was selected. Compressive strength of the optimum design showed better results than neat Portland cement. Unlike neat Portland cement, which needs fluid loss additives, the new formulation of geopolymer investigated in this study showed fluid losses lower than 100 ml after 30 min when tested using a low-pressure, low-temperature filtrate loss tester. The higher mechanical strength of geopolymer using fly ash Class C compared to Portland cement is very promising for achieving long-term wellbore integrity goals and meeting regulatory criteria for zonal isolation. The rheological behavior, compressive strength, and fluid loss tests results indicate that fly ash Class C based geopolymer has the potential to be an environmentally friendly alternative to Portland cement when cementing oil wells.
|File Size||1 MB||Number of Pages||14|
Alkhamis, M., & Imqam, A. (2018, August 16). New Cement Formulations Utilizing Graphene Nano Platelets to Improve Cement Properties and Long-Term Reliability in Oil Wells. Society of Petroleum Engineers. doi: 10.2118/192342-MS.
Bois, A.-P., Garnier, A., Galdiolo, G., & Laudet, J.-B. (2012, June 1). Use of a Mechanistic Model To Forecast Cement-Sheath Integrity. Society of Petroleum Engineers. doi: 10.2118/139668-PA.
De Andrade, J., Sangesland, S., Todorovic, J., & Vrålstad, T. (2015, April 22). Cement Sheath Integrity During Thermal Cycling: A Novel Approach for Experimental Tests of Cement Systems. Society of Petroleum Engineers. doi: 10.2118/173871-MS.
Khalifeh, M., Saasen, A., Vralstad, T., & Hodne, H. (2014, April 2). Potential Utilization of Geopolymers in Plug and Abandonment Operations. Society of Petroleum Engineers. doi: 10.2118/169231-MS.
King, G. E., & King, D. E. (2013, November 1). Environmental Risk Arising From Well-Construction Failure--Differences Between Barrier and Well Failure, and Estimates of Failure Frequency Across Common Well Types, Locations, and Well Age. Society of Petroleum Engineers. doi: 10.2118/166142-PA.
Liu, X., Aughenbaugh, K., Lee, H., Nair, S., & Oort, E. van. (2017, April 3). Geopolymer - Synthetic Based Mud Hybrid Cements for Primary Cementing and Lost Circulation Control. Society of Petroleum Engineers. doi: 10.2118/184558-MS.
Salehi, S., Ali, N., Khattak, M. J., & Rizvi, H. (2016a, September 26). Geopolymer Composites as Efficient and Economical Plugging Materials in Peanuts Price Oil Market. Society of Petroleum Engineers. doi: 10.2118/181426-MS.
Salehi, S., Khattak, M. J., Ali, N., & Rizvi, H. R. (2016b, March 1). Development of Geopolymer-based Cement Slurries with Enhanced Thickening Time, Compressive and Shear Bond Strength and Durability. Society of Petroleum Engineers. doi: 10.2118/178793-MS.
Sugumaran, M. (2015, October 20). Study on Effect of Low Calcium Fly Ash on Geopolymer Cement for Oil Well Cementing. Society of Petroleum Engineers. doi: 10.2118/176454-MS.
Suppiah, R. R., Rahman, S. H. A., Irawan, S., & Shafiq, N. (2016, November 12). Development of New Formulation of Geopolymer Cement for Oil Well Cementing. International Petroleum Technology Conference. doi: 10.2523/IPTC-18757-MS.
UEHARA, M. (2010, March 03). New Concrete with Low Environmental Load Using the Geopolymer Method. Retrieved from https://www.jstage.jst.go.jp/article/rtriqr/51/1/51_1_1/_article.
Webster, W. W., & Eikerts, J. V. (1979, January 1). Flow After Cementing : A Field And Laboratory Study. Society of Petroleum Engineers. doi: 10.2118/8259-MS.