Method and device for determining stratum apparaent resistivity based on anti-symmetric square wave

A device for determining a stratum apparent resistivity based on an anti-symmetric square wave, comprising:

• an acquisition module, configured to acquire a first time-domain signal observed by a detection instrument in a predetermined homogeneous model and a second time-domain signal observed in a target stratum, wherein the predetermined homogeneous model refers to a model with a predetermined fixed conductivity value, and the first time-domain signal and the second time-domain signal are obtained by the detection instrument observing an excitation source of the anti-symmetric square wave;
• a current waveform corresponding to the excitation source of the anti-symmetric square wave has equal magnitude but opposite directions in positive and negative half-cycles, and an equal duration;
• a determination module, configured to determine first magnetic field distribution information corresponding to the predetermined homogeneous model based on the first time-domain signal, and determine second magnetic field distribution information corresponding to the target stratum based on the second time-domain signal;
• and
• a computation module, configured to acquire a full-zone apparent resistivity of the target stratum through an iterative algorithm based on the first magnetic field distribution information and the second magnetic field distribution information.