Acoustic wave and electromagnetic probe co-located post-casing reservoir on-line monitoring method and system

The invention relates to a post-casing reservoir on-line monitoring method and system with a sound wave probe and an electromagnetic probe arranged together, and the method comprises the steps: building a joint detection layered columnar model, and analyzing a joint detection mechanism of an electromagnetic method and a sound wave method; designing the structure of the acoustic-magnetic co-positioned probe based on the analysis result, and arranging the acoustic-magnetic co-positioned probe at different depths of the position to be detected; simultaneously transmitting an acoustic signal and an electromagnetic signal by using an acoustic-magnetic co-positioned probe, and receiving the acoustic signal and the electromagnetic signal by using a corresponding receiver to obtain a plurality of groups of test data; and performing noise suppression on the multiple groups of test data, analyzing the energy distribution condition, determining the corresponding relationship between the induced electromotive force and t