The promoting effect of quercetin on oil well cement setting

In this paper, the resistance to H2S attack of pastes made from slag-fly ash blended cement used in oil well (SFAOW) was studied, in which fly ash (FA) was used at replacement dosages of 30% to 60% by weight of slag. Samples of SCOW and SFAOW pastes were demoulded and cured by immersion in fresh water with 2 Mp H2S insulfflation under 130oC for 15 days. After this curing period, compression strength and permeability of the samples were investigated. The reaction mechanisms of H2S with the paste were carried out through a microstructure study, which included the use of x-ray diffraction (XRD) patterns and scanning electron microscope (SEM). Based on the obtained data in this study, incorporation of FA into SCOW results in the comparable effects in the resistance to H2S attack. When the replacement dosage of slag is about 40%, the paste exhibits the best performance on resistance to H2S attack with compression strength 36.58Mp.

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Influence of sulfuric and hydrochloric acid on the resistance of geopolymer cement with nano-silica additive for oil well cement application

International Journal of Structural Integrity ◽

10.1108/ijsi-11-2017-0066 ◽

2018 ◽

Vol 9 (5) ◽

pp. 616-624 ◽

Cited By ~ 1

Author(s):

Syahrir Ridha ◽

Afif Izwan Abd Hamid ◽

Riau Andriana Setiawan ◽

Ahmad Radzi Shahari

Keyword(s):

Fly Ash ◽

Hydrochloric Acid ◽

Strength Increase ◽

Oil Well ◽

Nano Silica ◽

Content Type ◽

Oil Well Cement ◽

Geopolymer Cement ◽

Well Cement ◽

Silica Additive

PurposeThe purpose of this paper is to investigate the resistivity of geopolymer cement with nano-silica additive toward acid exposure for oil well cement application.Design/methodology/approachAn experimental study was conducted to assess the acid resistance of fly ash-based geopolymer cement with nano-silica additive at a concentration of 0 and 1 wt.% to understand its effect on the strength and microstructural development. Geopolymer cement of Class C fly ash and API Class G cement were used. The alkaline activator was prepared by mixing the proportion of sodium hydroxide (NaOH) solutions of 8 M and sodium silicate (Na2SiO3) using ratio of 1:2.5 by weight. After casting, the specimens were subjected to elevated curing condition at 3,500 psi and 130°C for 24 h. Durability of cement samples was assessed by immersing them in 15 wt.% of hydrochloric acid and 15 wt.% sulfuric acid for a period of 14 days. Evaluation of its resistance in terms of compressive strength and microstructural behavior were carried out by using ELE ADR 3000 and SEM, respectively.FindingsThe paper shows that geopolymer cement with 1 wt.% addition of nano-silica were highly resistant to sulfuric and hydrochloric acid. The strength increase was contributed by the densification of the microstructure with the addition of nano-silica.Originality/valueThis paper investigates the mechanical property and microstructure behavior of emerging geopolymer cement due to hydrochloric and sulfuric acids exposure. The results provide potential application of fly ash-based geopolymer cement as oil well cementing.

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Rheological properties of oil well cement slurries

Proceedings of the Institution of Civil Engineers - Construction Materials ◽

10.1680/coma.2012.165.1.25 ◽

2012 ◽

Vol 165 (1) ◽

pp. 25-44 ◽

Cited By ~ 19

Author(s):

Anjuman Shahriar ◽

Moncef L. Nehdi

Keyword(s):

Rheological Properties ◽

Oil Well ◽

Oil Well Cement ◽

Well Cement

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Effects of confinement pressure on the mechanical behavior of an oil well cement paste

Journal of Petroleum Science and Engineering ◽

10.1016/j.petrol.2021.109769 ◽

2021 ◽

pp. 109769

Author(s):

Victor Nogueira Lima ◽

Flávio de Andrade Silva ◽

Hans Joakim Skadsem ◽

Katherine Beltrán-Jiménez ◽

Jonas Kristoffer Sunde

Keyword(s):

Mechanical Behavior ◽

Cement Paste ◽

Oil Well ◽

Confinement Pressure ◽

Oil Well Cement ◽

Oil Well Cement Paste ◽

Well Cement

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Carbon Dioxide Corrosion and Corrosion Prevention of Oil Well Cement Paste Matrix in Deep Wells

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.692.433 ◽

2014 ◽

Vol 692 ◽

pp. 433-438 ◽

Cited By ~ 1

Author(s):

Jing Fu Zhang ◽

Jin Long Yang ◽

Kai Liu ◽

Bo Wang ◽

Rui Xue Hou

Keyword(s):

Carbon Dioxide ◽

Compressive Strength ◽

Cement Paste ◽

Oil Wells ◽

Oil Well ◽

Cement Slurry ◽

Corrosion Prevention ◽

Oil Well Cement ◽

Oil Well Cement Paste ◽

Well Cement

Carbon dioxide CO2could corrode the oil well cement paste matrix under agreeable moisture and pressure condition in deep oil wells, which could decrease the compressive strength and damage the annular seal reliability of cement paste matrix. The problem of oil well cement paste matrix corrosion by CO2was researched in the paper for obtain the feasible corrosion prevention technical measures. The microstructure and compressive strength of corroded cement paste matrix were examined by scanning electron microscopeSEMand strength test instrument etc. under different corrosion conditions. The mechanism and effect law of corrosion on oil well cement paste matrix by CO2were analyzed. And the suitable method to protect CO2corrosion in deep oil wells was explored. The results show that the corrosion mechanism of cement paste matrix by CO2was that the wetting phase CO2could generate chemical reaction with original hydration products produced from cement hydration, which CaCO3were developed and the original composition and microstructure of cement paste matrix were destroyed. The compressive strength of corrosion cement paste matrix always was lower than that of un-corrosion cement paste matrix. The compressive strength of corrosion cement paste matrix decreased with increase of curing temperature and differential pressure. The corroded degree of cement paste matrix was intimately related with the compositions of cement slurry. Developing and design anti-corrosive cement slurry should base on effectively improving the compact degree and original strength of cement paste matrix. The compounding additive R designed in the paper could effectively improve the anti-corrosive ability of cement slurry.

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