火成岩具有强磁化率，导致火成岩孔隙内部产生强磁场梯度，使火成岩的核磁测井T2谱发生前移、核磁孔隙度减小；
Igneous rock with strong magnetic susceptibility, leading to strong internal magnetic field gradient, and to T2 spectrum forward and NMR porosity decrease.
磁性泥浆的磁化率可能会影响一些测井响应，主要是感应交流信号和核磁共振信号。
The magnetic susceptibility may affect the response of some logging measurements, mainly the induction X signal and nuclear magnetic resonance logs.
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