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脉冲中子-中子(PNN)测井是一种通过记录发生俘获反应后地层中的剩余热中子数量,进而来获取储层剩余油饱和度的测井技术。它的测量原理、数据采集和处理方式与常规中子寿命测井相比均有独特之处。通过其在青海油田大量的测井实践以及资料解释方法的研究,认为该项测井技术可在水淹层评价,寻找潜力层和未动用层,有效识别气层,识别低阻油层,低孔低渗储层评价,复杂岩性识别,有效判断干层等地质应用方面发挥出重要作用。
Pulsed neutron-neutron (PNN) logging is a logging technique that records the amount of residual thermal neutrons in the formation after a capture reaction takes place to gain residual oil saturation in the reservoir. Its measurement principle, data acquisition and processing methods are different from conventional neutron life-span logging. Through a large number of logging practices and data interpretation methods in Qinghai oilfield, it is considered that this logging technique can be used in water flooded layer evaluation to find potential and unused layers, effectively identify gas layers, identify low resistivity reservoirs, and low porosity Low permeability reservoir evaluation, complex lithology identification, effective judgment of dry layer and other geological applications play an important role.