Pulse neutron logging method and pulse neutron logging device

An embodiment of the invention provides a pulse neutron logging method and a pulse neutron logging device. The pulse neutron logging method includes: performing logging through the pulse neutron logging technology and acquiring a time spectrum of each depth point; determining capture spectroscopy according to the time spectrums of the depth points, wherein the capture spectroscopy is used for representing a macroscopic-capture cross section corresponding to continuous multiple thermal neutron lifetime for each depth point; performing recognition processing on a water flooded layer according to the capture spectroscopy. With the method, the macroscopic-capture cross section can be represented comprehensively and accurately through the capture spectroscopy, and down-hole recognition processing can be assuredly performed accurately. 本发明实施例提供种脉冲中子测井方法及装置，该方法包括：通过脉冲中子测井技术测井，并获取每个深度点上的时间谱；根据每个深度点上的时间谱确定俘获谱，该俘获谱用于表示针对每个深度点，连续多个热中子寿命对应的宏观俘获截面；根据俘获谱对水淹层进行识别处理。该俘获谱能够全面、准确的反应宏观俘获截面，进而确保能够准确的进行井下识别处理。