Abstract: Assessment of logging interpretation parameters is a core issue in quantitatively interpreting residual oil saturation in Pulsed neutron-neutron (PNN) logging.In this study, the standard petrophysical volume model and modified model for the quantitative interpretation of PNN saturation were analyzed, the method used to determine the capture section of different components, namely matrix, shale, formation water, and hydrocarbons, was discussed, and a graphical interpretation parameter selection module was developed based on PyQt.The interpretation parameters were determined using the graphical-enhanced method of this module, and the actual logging data of the PNN were interpreted and analyzed.The results have shown that the standard petrophysical volume model and the modified model for the quantitative interpretation of PNN saturation have unity in form, and the essence was the selection of regional interpretation parameters.The interpretation parameter selection module developed based on PyQt meets the requirements of logging interpretation, avoids the determination of regional characteristic factors of the modified model, and accurately obtains the regional capture section parameters of different components.The saturation interpretation result of PNN logging is in line with the case-hole resistivity logging interpretation result and is consistent with the actual production performance data.This demonstrates the suitability and accuracy of the proposed interpretation parameter selection method.This method is important for quantitatively interpreting saturation in PNN, thermal neutron imaging logging (TNIS), and pulsed neutron lifetime logging (NLL).