4.7 Article

Hydrothermal synthesis of bentonite carbon composites for ultra-high temperature filtration control in water-based drilling fluid

期刊

APPLIED CLAY SCIENCE
卷 230, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.clay.2022.106699

关键词

Bentonite; Hydrothermal carbonization reaction; Filtration; Water-based drilling fluid; Ultra-high temperature; Intensity (a; u; )

资金

  1. CNPC Innovation Fund Project [2020D-5007-0310]
  2. National Natural Science Foundation of China [52174013, 51974354]

向作者/读者索取更多资源

In this study, bentonite hydrothermal carbon composites (BHCCs) were successfully fabricated and their rheological and filtration properties were investigated. The results demonstrated that the BHCCs exhibited excellent filtration control under high-temperature conditions.
In this study, bentonite hydrothermal carbon composites (BHCCs) were fabricated by green and facile hydro-thermal carbonization, employing glucose as the carbon source and bentonite as the template. BHCCs were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The effects of the BHCCs on the rheological and filtration properties of bentonite dispersions were investigated before and after thermal aging at 220 C and 240 C, respectively. The results demonstrated that, unlike conventional synthetic polymers, the BHCCs exhibited a minor influence on the rheology of bentonite dispersion and had extraordinary filtration control both before and after ultra-high-temperature aging. The incorporation of BHCCs helped introduce the oxygenated groups with carbon species, thereby enhancing the dispersion stability of bentonite particles. The spherical nano-sized carbon particles in BHCCs filled the gaps between large particles in the filter cake. The above factors contributed to excellent filtration control under hostile, high-temperature conditions.

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