Overview of the research and application of carbon-based nano-fluorescent tracer in low-permeability reservoir

As the emerging fluorescent material, carbon-based nano-fluorescent tracers exhibit excellent fluorescent properties and surface modifiability. They hold significant application potential in fields such as oilfield tracing, biomedical imaging, and water treatment. However, the development of low-permeability oil reservoirs is confronted with challenges including low permeability and complex geological conditions. Traditional tracers suffer from limitations such as poor migration capability and low stability, which restricts the dynamic monitoring of production performance in low-permeability oil reservoirs. How to achieve long-term dynamic monitoring in low-permeability oil reservoirs has become a global challenge, making the research on tracers suitable for low-permeability oil reservoirs critically important. Currently, there is a lack of comprehensive review studies on the application of carbon-based nano-fluorescent tracers in low-permeability oil reservoirs. This article not only analyzes the adaptation mechanism of carbon-based nano-fluorescent tracers to low-permeability oil reservoirs and their synthesis technologies-filling the gap in review studies within this field, but also discusses the practical application and effects of these tracers in oilfields. Furthermore, addressing issues such as low fluorescence yield and difficulties in large-scale production, this article proposes strategies, including material modification and green synthesis, to achieve both economic efficiency and environmental sustainability. Through these research efforts, aiming to provide more efficient tracers for the petroleum energy industry, thereby promoting advancements in both the petroleum and materials fields.