Recent advances and prospects on retarder application in oilwell cement: A review

Nwaichi, Peter Ikechukwu and Norida, Ridzuan and Nwaichi, Eucharia Oluchi and Umunnawuike, Chika and Agi, Augustine Aja (2024) Recent advances and prospects on retarder application in oilwell cement: A review. Geoenergy Science and Engineering, 241 (213103). pp. 1-30. ISSN 2949-8910. (Published)

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Abstract

Retarders are used to prevent hydration of oilwell cement by prolonging thickening and setting time for cement slurry application under deep and high-temperature conditions. However, at higher temperature, abnormal gelation and thickening time reversal occur. Hence, an adequate understanding of the factors influencing retarders mechanisms is required for effective application in deep oilwells. Therefore, this review presents vital information on the formulation, mechanism, and factors influencing the application of retarders in oilwell cementing. Herein, the formulation methods were discussed. Thereafter, the different types of retarders and their corresponding mechanisms were pinpointed. Similarly, the factors influencing these mechanisms were revealed. Moreover, the application of retarders in oilwell cementing was reviewed. Finally, the challenges prevalent during the application of retarders in oilwell cementing have unlocked new prospects for research with proffered solutions. Experimental results indicate that the concentration of a retarder is related to the setting time of the cement. Likewise, the consistency of the cement slurry should be less than 30 Bc to ensure that it can be pumped into oilwell. Hence, to achieve a very low consistency, the retarder should be added after the cement past has been prepared rather than premixing with cement (dry blending). But for high-temperature reservoirs (>150 °C), it is advisable to use multiple retarders.

Item Type:	Article
Uncontrolled Keywords:	Retarders; Oilwell cement; Compressive strength; Rheology; Setting and thickening time; Drilling and completion
Subjects:	T Technology > TP Chemical technology
Faculty/Division:	Institute of Postgraduate Studies Faculty of Chemical and Process Engineering Technology Centre for Research in Advanced Fluid & Processes (Fluid Centre)
Depositing User:	Miss Amelia Binti Hasan
Date Deposited:	18 Jul 2024 07:07
Last Modified:	18 Jul 2024 07:07
URI:	http://umpir.ump.edu.my/id/eprint/42004
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