Electromagnetic compatibility analysis and interference shielding method for AcoustoElectric Logging Tool 2.0

Abstract Acoustoelectric logging is an important reservoir permeability evaluation method in the field of oil and gas exploration. Its complex composition, weak acoustoelectric signals, vulnerability to Electro Magnetic Interference, and other characteristics require high Electro Magnetic Compatibility. In this study, after systematically analysing the interference characteristics of the detector, the electromagnetic protection measures are found to be largely inadequate. A complete shielding of the transmitting acoustic system was proposed. The shielding effectiveness was calculated and tested. In the test, the shielding suppression was ineffective, and the interference was enhanced by 60 dB instead. The explanation of conducted interference was given, and the conducted interference simulation prediction model was established. The simulation result explains the experimental result well. According to the suppression measurements provided by the model, the conducted interference was effectively suppressed, making the shielding effect of the transmitting acoustic system meet the design requirements.