Volume 43 Issue 4
Jul.  2026
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2026  >  43(4): 435-444
Liu Tengjiao, Zhang Xianbin, Yan Xiaoting, et al.Mechanism of modified nano-SiO2 used in drilling fluids[J]. Drilling Fluid & Completion Fluid，2026, 43（4）：435-444 doi: 10.12358/j.issn.1001-5620.2026.04.001
Citation: Liu Tengjiao, Zhang Xianbin, Yan Xiaoting, et al.Mechanism of modified nano-SiO2 used in drilling fluids[J]. Drilling Fluid & Completion Fluid，2026, 43（4）：435-444 doi: 10.12358/j.issn.1001-5620.2026.04.001
shu

Mechanism of Modified Nano-SiO2 Used in Drilling Fluids

doi: 10.12358/j.issn.1001-5620.2026.04.001
  • 1.

    Tianjin Key Laboratory of Drilling Fluids under Complex Conditions, Tianjin 300280

  • 2.

    Drilling Fluid Technology Services of CNPC Bohai Drilling Engineering Company Limited, Tianjin 300280

  • Received Date: 2026-01-20
  • Rev Recd Date: 2026-03-13
  • Publish Date: 2026-07-30
    Abstract
  • As oil and gas exploration gradually extends to deep and complex formation drilling as well as unconventional oil and gas reservoirs, drilling fluids in high temperature high pressure downhole environment are faced with dual severe challenges of wellbore instability and rapid deterioration of their own properties. Nano-silica (SiO2) exhibits great potential in enhancing the properties of a drilling fluid, its inherent agglomeration effect, however, restricts its application. To fully exert the nano-advantages of SiO2 and to endow it with specific functions, it is necessary to render surface modification to SiO2. This paper systematically reviews the mechanism and research progress of modified nano-SiO2 in drilling fluids, focusing on the multiple synergistical mechanisms of nano-SiO2 in physical plugging, chemical inhibition and interfacial regulation in wellbore stabilization. The application of modified nano-SiO2 as the core additive in optimizing drilling fluid rheology, controlling fluid loss and lubricating is also systematically summarized. The cutting-edge research advances of modified nano-SiO2-based smart responsive composite materials are comprehensively reviewed, and the huge potential of their smart behaviors, such as temperature responsiveness, in achieving formation-adaptative plugging and performance regulation are revealed. Although breakthroughs have been made currently in surface modification technology, property regulation mechanism and multifield applications of modified nano-SiO2, demonstrating broad industrialization prospects, bottlenecks still need to be urgently broken through in the mechanical and large-scale preparation as well as long-term stabilization of modified nano-SiO2 materials. Strength should be given in future research to solving the problems aforementioned to push forward the large-scale application of modified nano-SiO2 in drilling fluids.

     

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