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Effect of nanosilica on rheological properties of oil well cement slurry under HPHT conditions

Author(s): M. K. Rahman, A. S. Abdul-Karim, A. A. Al-Majed
Paper category: Proceedings
Book title: Proceedings of the Seventh International Conference on Concrete under Severe Conditions – Environment and Loading
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjřrv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 900-911
Total Pages: 12
Language : English

Abstract: Rheological behavior of oil well cement slurry is complex owing to the high-temperature and high-pressure (HTHP) conditions to which it is subjected during the cementing of well casing. A host of admixtures is generally used to make a robust cement slurry for execution primary cementing job and providing protection to the casing under a hostile downhole environment. Nanomaterial application in oil well cementing has recently been investigated in the oil and gas industry. Nanomaterial based cement slurry is believed to have potential for enhancing mechanical properties and reducing permeability and porosity, which are important for its long-term integrity and durability. This paper presents the result of an experimental investigation conducted on Type-G oil well cement slurry incorporating nanosilica under HTHP conditions. The nanosilica cement mixes were prepared by replacing cement with 1%, 2% and 3% nanosilica by weight of cement, silica flour, silica sand and other admixtures typically used in oil well cementing in Saudi Arabian oil fields. Laboratory studies including rheological measurements, thickening time test and fluid loss test were conducted. Experimental investigations show that cement slurry with 3% nanosilica was virtually non-flowing, Oil well cement slurry at 1% and 2% nanosilica exhibited enhanced performance as compared to the cement slurry without nanosilica.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00

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