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Molecular Simulation of Hydration Characteristics of Montmorillonite under Potassium Salt Inhibitor

  • INNOVATIVE TECHNOLOGIES OF OIL AND GAS
  • Published:
Chemistry and Technology of Fuels and Oils Aims and scope

The hydration of the shale is an important factors to the stability of borehole wall, and montmorillonite as the main component of the shale, its hydration inhibition mechanism is of great significance to maintain the stability of borehole wall of the shale. In this paper, molecular simulation software Material Studio is used to study the inhibition mechanism of potassium salt hydration inhibitors from a microscopic perspective. The results show that under the same conditions, montmorillonite has the smallest layer spacing, the largest diffusion coefficient, the smallest coordination number and the best inhibitory effect. On the whole, the parameters of potassium nitrate are significantly higher than potassium silicate and potassium carbonate; Hydration degree is low, potassium chloride inhibitor on the mechanical parameters of montmorillonite increase degree is one of the biggest, followed by potassium nitrate, potassium carbonate and potassium silicate; The effect of potassium formate on the mechanical strength of montmorillonite was similar to that of potassium chloride at higher hydration degree. Therefore, different hydration inhibitors should be selected for different hydration degrees.

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Acknowledgments

This work is supported by Science and Technology Cooperation Project of the China National Petroleum Corporation-Southwest Petroleum University (CNPC-SWPU) Innovation Alliance (No.2020CX040201).

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Authors and Affiliations

  1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan, China

    Ai Zhang & Junlin Su

  2. CCDC Changqing Drilling Company, Xi’an, Shaanxi, China

    Lizong Li

Authors
  1. Ai Zhang
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  2. Junlin Su
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  3. Lizong Li
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Correspondence to Junlin Su.

Additional information

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 2, pp. 94–97 March– April, 2022.

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Zhang, A., Su, J. & Li, L. Molecular Simulation of Hydration Characteristics of Montmorillonite under Potassium Salt Inhibitor. Chem Technol Fuels Oils 58, 403–409 (2022). https://doi.org/10.1007/s10553-022-01397-1

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  • DOI: https://doi.org/10.1007/s10553-022-01397-1

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