Post-fracturing monitoring is a vital tool for fracturing effect evaluation and fracturing design optimization. Our company has developed a quantum dot tracing monitoring technology that can assess the fracturing effect after fracturing. Currently, the patent for this product has been granted: A quantum tracing device and completion pipe for oil and gas wells. Quantum dots are artificially synthesized semiconductor fluorescent nanocrystals that have excellent photoluminescence, water solubility, low cost, high detection accuracy, wide sources and other benefits. They have been applied in the field with remarkable results and have promising application prospects in shale horizontal wells.