Logging method and device

The embodiment of the invention provides a logging method and device. The method comprises the steps that through a multi-dimensional nuclear magnetic logging instrument, multiple first electromagnetic waves with different frequencies are sent, and through the multiple first electromagnetic waves with different frequencies, different detection depths are detected; through a preset signal collection circuit, electromagnetic wave signals of second electromagnetic waves generated by resonance of the first electromagnetic waves in a stratum are collected; the electromagnetic wave signals are subjected to back calculation, corresponding spectral information is obtained, and according to the spectral information, a multi-dimensional logging spectrum can be built and comprises a two-dimensional spectrum and a three-dimensional spectrum; according to the multi-dimensional logging spectrum, multi-dimensional nuclear magnetic multi-frequency slices corresponding to different detection depths areobtained; and the multi-