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  • Open Access


    Development of a High-Temperature Thixotropic Cement Slurry System

    Ping Lv1, Jiufei Liu2, Mengran Xu3,*, Hui Tian3,4, Huajie Liu3, Yuhuan Bu3, Zhuang Cai3, Junfeng Qu5

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2907-2921, 2023, DOI:10.32604/fdmp.2023.029304

    Abstract Cementing carbonate reservoirs is generally a difficult task. The so-called thixotropic cement slurry has gained considerable attention in this regard as it can help to fix some notable problems. More precisely, it can easily fill the leakage layer; moreover, its gelling strength can grow rapidly when pumping stops, thereby increasing the resistance to gas channeling, effectively preventing this undesired phenomenon in many cases. High-temperature thixotropic cement slurry systems, however, are still in an early stage of development and additional research is needed to make them a viable option. In the present study, using a self-developed composite high-temperature thixotropic additive as… More >

  • Open Access


    Hydrophobic Small-Molecule Polymers as High-Temperature-Resistant Inhibitors in Water-Based Drilling Fluids

    Xuyang Yao1,*, Kecheng Liu1, Zenan Zhou1, Jun Zhou1, Xianbin Huang2, Tiemei Lu1, Yongsheng Yu1, He Li2

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.7, pp. 1775-1787, 2023, DOI:10.32604/fdmp.2023.025843

    Abstract Water-based drilling fluids can cause hydration of the wellbore rocks, thereby leading to instability. This study aimed to synthesize a hydrophobic small-molecule polymer (HLMP) as an inhibitor to suppress mud shale hydration. An infrared spectral method and a thermogravimetric technique were used to characterize the chemical composition of the HLMP and evaluate its heat stability. Experiments were conducted to measure the linear swelling, rolling recovery rate, and bentonite inhibition rate and evaluate accordingly the inhibition performance of the HLMP. Moreover, the HLMP was characterized through measurements of the zeta potential, particle size distribution, contact angles, and interlayer space testing. As… More > Graphic Abstract

    Hydrophobic Small-Molecule Polymers as High-Temperature-Resistant Inhibitors in Water-Based Drilling Fluids

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