Gas cut overflow monitoring system and method

The invention discloses a gas cut overflow monitoring system and method, and relates to the technical field of petroleum drilling monitoring, and the system comprises a reference data acquisition module, a time parameter setting and testing module, an HDT automatic setting module and a gas cut overflow monitoring module. An ultrasonic transmitting and receiving device is used for carrying out gas cut overflow simulation monitoring and obtaining preliminary gas cut overflow monitoring reference data, a time parameter setting test module is used for testing to obtain HDT time parameters when normal reference data is obtained, and an HDT automatic setting module is used for carrying out HDT automatic setting according to a test result. The final gas cut overflow monitoring reference data obtained after HDT time parameter setting is obtained, gas cut overflow monitoring is conducted through the gas cut overflow monitoring module by means of an ultrasonic transmitting and receiving device, an alarm signal is sent