中子寿命求剩余油饱和度影响因素探讨

中子寿命测井在高矿化度地层中监测剩余油饱和度变化和寻找高剩余油、高含水油层等方面具有很好的效果，但作为定量评价其准确度受到泥质含量、岩石骨架的俘获截面值、孔晾度等不确定因素的影响。因此要利用中子寿命测井求剩余油饱和度就必须要对各种影响因素进行校正。本文针对轮南油田2井区已有中子寿命测井资料，对影响中子寿命测井的各种因素进行研究分析，通过图版法进行校正，并与实际资料进行对比，从而得出更为精确的剩余油饱和度。

A Discussion on the Factors of Neutron Lifetime for the Remaining Oil Saturation

Neutron lifetime logging has a very good result in the formation of high salinity,in the monitoring of residual oil saturation change and in finding a high residual oil.But as a quantitative evaluation,the accuracy of its standard is affected by the clay content,rock capture cross-section of the skeleton,porosity,and some other factors.Therefore,to make use of the neutron lifetime logging for the remaining oil saturation,the various factors must be corrected.This paper analyzes those factors of neutron lifetime logging on neutron lifetime logging data collected from the second well district of Lunnan oilfield.Through the chart correction method and the comparison of the actual data,the precise remaining oil saturation is obtained.