Effect of Fly Ash and Slag on the Resistance to H2S Attack of Oil Well Cement

Abstract:

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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.

Info:

Periodical:

Advanced Materials Research (Volumes 79-82)

Edited by:

Yansheng Yin and Xin Wang

Pages:

71-74

DOI:

10.4028/www.scientific.net/AMR.79-82.71

Citation:

Q. Wang et al., "Effect of Fly Ash and Slag on the Resistance to H2S Attack of Oil Well Cement", Advanced Materials Research, Vols. 79-82, pp. 71-74, 2009

Online since:

August 2009

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Price:

$35.00

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