膨润土
钻井液
热液循环
过滤(数学)
钻探
复合材料
碳纤维
材料科学
化学工程
复合数
地质学
岩土工程
冶金
数学
统计
工程类
作者
Hanyi Zhong,Ying Guan,Jian Su,Xianbin Zhang,Ming Lu,Zhengsong Qiu,Weian Huang
标识
DOI:10.1016/j.clay.2022.106699
摘要
In this study, bentonite hydrothermal carbon composites (BHCCs) were fabricated by green and facile hydrothermal 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. • Bentonite hydrothermal carbon composite (BHCC) was synthesized for filtration control. • BHCC exhibited effective filtration control capacity under ultra-high temperatures. • Improved dispersion stability and filling filtercake pores led to low filtration loss.
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