The effect of initial curing temperature on the performance of oilwell cements made with different types of silica

Grabowski, E. F.; Gillott, J. E.

doi:10.1016/0008-8846(89)90041-0

Cited by 9 publications

(2 citation statements)

References 3 publications

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“…Indeed, denser C-S-H are generally observed when the curing temperature of the cement pastes is increased [31]. For temperature abovẽ 120°C, it is well known that a neat cement paste (without silica source) show strength retrogression due the formation of α-dicalcium silicate hydrate (α-C 2 SH) at the expense of amorphous C-S-H [31][32][33][34]. For lower temperatures, results show a deterioration of mechanical properties associated with an increasing water permeability [35].…”

Section: Figurementioning

confidence: 99%

Durability of Hardened Portland Cement Paste used for Oilwell Cementing

Lécolier

Rivereau

Saoût

et al. 2007

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Durabilité d'une pâte de ciment durcie utilisée pour la cimentation des puits pétroliers -Les problèmes de durabilité des matériaux utilisés pour les sondages pétroliers sont une question essentielle pour l'industrie pétrolière. Nous avons mené des essais de vieillissement d'une pâte de ciment dans deux types de fluides en variant la procédure expérimentale. Nous montrons que les altérations observées sont très dépendantes de la façon dont les essais sont menés. Pour évaluer correctement la durabilité à long terme des matériaux cimentaires, il est notamment nécessaire de renouveler périodiquement le fluide dans lequel le matériau vieillit. En menant les essais ainsi, on montre que les propriétés macroscopiques d'une pâte de ciment durcie sont fortement dégradées. Abstract -Durability of Hardened Portland Cement Paste used for Oilwell CementingDurability of materials used for the completion of oilwell is of utmost importance for oil and gas industry. We carried out ageing tests on a hardened cement paste in two types

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Section: Figurementioning

confidence: 99%

Durability of Hardened Portland Cement Paste used for Oilwell Cementing

Lécolier

Rivereau

Saoût

et al. 2007

Oil & Gas Science and Technology - Rev. IFP

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“…It was reported for the first time in the petroleum literature as a result of the growing number of deep well completions [1]. Many other studies have been performed since that time [2,3,[5][6][7][8]. A marked characteristic in all these studies is the difficulty in scientifically identifying and predicting the sequence of phase conversions Portland cement undergoes, even though many laboratory conditions were under control, a fact that demonstrates the continued difficulty in assessing strength retrogression.…”

Section: Introductionmentioning

confidence: 99%

The strength retrogression of special class Portland oilwell cement

Bezerra¹,

Martinelli

Melo

et al. 2011

Cerâmica

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Temperatures in excess of 110 ºC result in phase transformations of cement, significantly decreasing its compressive strength. This effect is referred to as strength retrogression. It is frequently observed in cement sheaths of heavy oil wells submitted to steam injection. The present study evaluated the mechanical behavior of Special Class Portland Oilwell Cement (SCPOC) slurries containing silica flour to prevent retrogression. A factorial statistical planning was used to assess the effect of the main variables on the mechanical behavior of cement slurries, i.e., mechanical testing temperature (30, 100, 120, 180 and 230 ºC); contents of silica flour replacing cement (0-18 and 36%) and curing time for rupture (12 h and 7 days). The results revealed that slurries containing 18% of silica flour tested at 230 ºC depicted an increase in compressive strength up to 30% after curing for 12 h and 10% after curing for 7 days, indicating retrogression. On the other hand, testing slurries containing silica flour at temperatures up to 180 ºC revealed strength increase of just 10%, suggesting the mechanical stability of the SCPOC, which prevents retrogression. Such behavior was probably related to the relatively low content of C3A and low specific area of the material. Therefore, strength retrogression at typical bottom hole temperatures of up to 180 ºC can be controlled by small additions of silica flour, economically contributing to the use of SCPOC cementing.

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Portland cement solutions for ultra-high temperature wellbore applications

Pernites¹,

Santra²

2016

Cement and Concrete Composites

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The effect of initial curing temperature on the performance of oilwell cements made with different types of silica

Cited by 9 publications

References 3 publications

Durability of Hardened Portland Cement Paste used for Oilwell Cementing

Durability of Hardened Portland Cement Paste used for Oilwell Cementing

The strength retrogression of special class Portland oilwell cement

Portland cement solutions for ultra-high temperature wellbore applications

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