Method and system for monitoring leakage of heavy oil thermal recovery medium conveying pipeline based on virtual sensing

The invention provides a virtual sensing-based thickened oil thermal recovery medium conveying pipeline leakage monitoring method and system, which comprises the following steps of: performing data acquisition, transmission and data processing on operation characteristic parameters such as pressure, temperature and flow of an inlet and an outlet of a pipeline, solving by adopting a software-based leakage detection algorithm model, and comparing a simulation result with field data, so as to monitor the leakage of a thickened oil thermal recovery medium conveying pipeline. And the operation state and leakage parameters of the manifold are determined. The device has the advantages that the device is suitable for real-time monitoring and daily maintenance of the pipeline leakage state of an offshore thermal recovery platform, and limitation of space and extreme environment is overcome; by means of system simulation, testing and the like, common normal working conditions such as steam injection, valve opening and