矿渣基固化剂对煤层气钻井泥饼的固化效果研究

doi:10.19964/j.issn.1006-4990.2024-0490

Abstract

Abstract:

In order to reduce the pollution and damage of drilling production to the surrounding environment，the drilling mud cake was took as the research object，different proportions of slag-based solidification agents were added to solidify the drilling mud cake.The strength of the solidified body and the pH，suspended solids（SS），chromaticity，COD_Cr and other indicators of the leachate were used to evaluate its solidification effect.X-ray diffraction（XRD） and scanning electron microscopy（SEM） were used to reveal its curing mechanism.The results showed that the compressive strength of the solidified body was increased with the increase of solidifying agent dosage and the extension of curing time.When the dosage was 20%，the compressive strength of the solidified body after 7 d was 0.17 MPa，which met the requirements of in-situ paving.When the content was 10% after 7 d，all indicators of the solidified leachate could meet the first level standard in GB 8978—1996“Integrate wastewater discharge standard”，and the solidifying effect of the slag-based solidifying agent was significantly better than that of cement.It was found that the slag-based solidification agent generated hydration products such as hydrated calcium silicate aluminate（C-A-S-H） and hydrated calcium aluminate（C-A-H） through microscopical test，which cemented with mud cake particles to form network structure，making the structure denser.The results of this research could provide some useful guidance and theoretical basis for the disposal of drilling waste mud cake.

Key words: drilling waste mud cake, solidification treatment, microscopic analysis, slag

CLC Number:

TQ127.2

ZHAO Wenwei, DONG Mingkun, HAN Ximeng, DENG Zhengyun, ZHAO Changmin. Study on solidification effect of slag-based solidifying agent on coal bed methane drilling waste mud cake[J]. Inorganic Chemicals Industry, 2025, 57(9): 96-103.

Figures/Tables 7

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Study on solidification effect of slag-based solidifying agent on coal bed methane drilling waste mud cake

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