Method for separating nuclear magnetic resonance signals of immiscible fluid in rock core

The invention discloses a method for separating nuclear magnetic resonance signals of immiscible fluids in a rock core, and particularly relates to a method for theoretically deducing and obtaining amplitude components of respective nuclear magnetic resonance T2 spectrum signals when the immiscible fluids coexist in the rock core by utilizing rich information contained in a nuclear magnetic resonance T2 spectrum signal curve measured when the immiscible fluids completely saturate a rock core sample. The method is easy and convenient to operate, the problem that different types of fluid nuclear magnetic resonance T2 spectrum signals cannot be directly separated when the immiscible fluid saturated rock core is researched through the nuclear magnetic resonance technology is solved, meanwhile, the experiment cost can be greatly reduced through implementation of the method, and remarkable economic benefits can be generated. Besides, the method can be used for separating the immiscible fluid nuclear magnetic resona