中子测井是利用中子和物质相互作用所产生各种效应的一组测井方法。在石油测井中,它作为一种孔隙度测井法,早已普遍被应用,在国外的煤田测井中,也已成为常规方法。我国的煤田测井迄今尚未开展此项工作。为了实现测井数字化,急需增加新的测井参数,而中子法和声波法则是比较成熟的方法,特在此作一简要介绍。中子测井可分为普通中子测井和脉冲中子测井两大类。前者使用连续发射的中子源,主要解决岩层的含氢量问题,通常的中子—中子测井法及中子—伽玛测井法即属于此,是石油和煤田中常规的测井方法之一;后者使用脉冲式发射的井下中子发生器,可以指示地 Neutron logging is a set of logging methods that exploit the effects of neutron-material interactions. It has been widely used as a porosity logging method in petroleum logging. It has also become a common method in coalfield logging abroad. China’s coalfield logging has not yet carried out this work. In order to digitize logs, it is urgent to add new logging parameters, while the neutron law and the law of sound waves are more mature methods, especially here for a brief introduction. Neutron logging can be divided into ordinary neutron logging and pulsed neutron logging two categories. The former uses a continuous emission of neutron sources, mainly to solve the problem of hydrogen content of rock strata. The usual neutron-neutron logging method and neutron-gamma logging method belong to this, which is the conventional logging in petroleum and coalfields One of the methods; the latter uses a pulsed fired downhole neutron generator that can indicate ground