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Structure–property relationship of polyetheramines as clay-swelling inhibitors in water-based drilling fluids

Authors

  • Bo Peng,

    Corresponding author
    1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Southwest Petroleum University, Chengdu 610500, People's Republic of China
    2. Technique Centre, Sichuan Renzhi Oilfield Technology Services Co., Ltd., Mianyang 621000, People's Republic of China
    • State Key Laboratory of Oil and Gas Reservoirs Geology and Exploration, Southwest Petroleum University, Chengdu 610500, People's Republic of China
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  • Ping-Ya Luo,

    1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Southwest Petroleum University, Chengdu 610500, People's Republic of China
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  • Wen-Yu Guo,

    1. College of Chemistry and Chemical Engineering, Mianyang Normal University, Mianyang 621000, People's Republic of China
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  • Qiuyue Yuan

    1. Technique Centre, Sichuan Renzhi Oilfield Technology Services Co., Ltd., Mianyang 621000, People's Republic of China
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Abstract

The influences of structure parameters of polyetheramines as clay-swelling inhibitors in water-based drilling fluids on the application performances were studied. Interactions of polyetheramines with clays were investigated through elemental analysis (EA), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The results showed that lower molecular weight, hydrophobic oxypropylene segment, and plentiful amino group of polyetheramines favored improvement of inhibitive properties, enhancement of adsorption abilities, and expelling interlayer bound waters of clays (as confirmed by cutting rolling test, bentonite inhibition test, EA, XRD, and TGA studies). Simultaneously, the polyetheramines did not produce adverse effect to filtration control of the drilling fluids. In addition, XRD patterns revealed that these polyetheramines could intercalate into interlayer spaces of clays and display a monolayer arrangement. The corresponding basal spacing of clays was correlated only with molecular weight of polyetheramines. The dense loading of polyetheramines in the interlayer of clays was beneficial in improving inhibitive properties. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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