简化The amplitude of the nuclear magnetic signal is proportional to the fluid content and the signal attenuation characteristics reflect the fluid occurrence environment When the bulk relaxation time is

The nuclear magnetic signal's strength depends on fluid content, and how it weakens shows the fluid's environment. When surface relaxation is strong and bulk relaxation is slow, the relaxation time (T1 or T2) relates to the ratio of fluid contact hole wall area to fluid volume (S/V). This relaxation time spectrum can show the real core's pore size distribution.