Improved neutron lifetime logging interpretation model and solving method of reservoir oil saturation based on model

The invention discloses an improved neutron lifetime logging interpretation model and a solving method of reservoir oil saturation based on the model. Monte Carlo simulation is adopted to qualitatively analyze the influences of oil saturation, formation water salinity, shale content and porosity on a formation capture cross section under the formation condition, wherein the shale content and the formation water salinity directly affects the differentiation of oil and water, so that the influences of the shale content and the formation water salinity are corrected according to the actual formation condition. Based on the traditional volume model and combining the Monte Carlo simulation with parameter sensitivity analysis, the invention proposes double-factor correction to correct the influences of shale and salinity (formation water), so as to increase the neutron lifetime logging interpretation accuracy. 本发明公开了一种改进的中子寿命测井解释模型及基于模型的储层含油饱和度求解方法，采用蒙特卡罗模拟定性的分析在地层条件下，含油饱和度、地层水矿化度、泥质含量及孔隙度对地层俘获截面的影响，其中泥质含量、地层水矿化度直接