Abstract：Borehole-to-surface(BSEM)electromagnetic responses were simulated in a laboratory flume based on the BSEM theory and the similarity criterion of electromagnetic physical simulation.A cement template doped with some graphite was coated in salt water to imitate high resistant object such as oil and gas reservoir.The finite vertical electric line source with periodic square wave current was put through the model.The electric field on the surface of water was measured.The frequency response curve of the anomaly field was acquired by calculating the first harmonic of the background and total electric field.The result indicates that the electric field along Y-axis characterized by double-peaks which centered by the current source,which reflects the distribution of the imitation body.The experimental study provides the experimental foundation for the oil and gas BSEM field operation as well as data for verifying the result of 3Dnumerical simulation.
