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1946年,珀塞尔(E.M.Purcell)和布洛赫(F.Bloch)在几乎相同的时间内,用不同的方法各自独立地发现了在物质的一般状态中的核磁共振(Nuclear Magnetic Resonance)现象。所谓核磁共振,就是处在某静磁场中的物质的原子核系统受到相应频率的电磁波作用时,在它的磁能级之间发生的共振跃迁现象。核磁测井(Nuclear Magnetic Logging)是利用核磁共振现象来测定地层中自由流体的含量、地层的孔隙度、渗透率、含油饱和度,以及划
In 1946, E.M. Purcell and F. Bloch found independently the phenomenon of nuclear magnetic resonance (NMR) in the general state of matter by different methods in almost the same time. The so-called nuclear magnetic resonance, is in a static magnetic field of matter atomic nucleus system by the corresponding frequency of electromagnetic waves, its magnetic energy levels occur between the resonant transition phenomenon. Nuclear magnetic logging (Nuclear Magnetic Logging) is the use of nuclear magnetic resonance phenomenon to determine the formation of free fluid content, formation porosity, permeability, oil saturation, and plan