基于Neville插值的脉冲中子铀矿测井热散射截面生成方法

Method of Thermal Scattering Cross Section in Pulsed Neutron Uranium Logging Based on Neville Interpolation

在深部探测过程中,脉冲中子铀矿测井受环境温度影响较大,需要使用不同温度的热散射数据对探测结果进行修正。本文根据热中子散射的S(α,β)原理,使用Neville插值方法生成脉冲中子铀矿测井用多温度热散射数据。使用热散射基准题与脉冲中子测井饱和模型例题对生成截面的准确性进行了验证,其计算结果与基准题的结果符合良好,证明设计的多温度热散射截面数据生成方法能够满足铀矿脉冲中子测井的需求。

In the deep exploration, the pulsed neutron uranium logging is greatly influenced by the ambient temperature and is necessary to use different temperature thermal scattering data to correct the deep environment. Based on the principle of thermal neutron scattering S(α,β),this paper uses the Neville interpolation method to generate multi -temperature thermal scattering data for the pulsed neutron uranium ore logging based on makxsf. The accuracy of the data was verified by the heat scattering reference question and the pulsed neutron saturation model test. The calculation results are in good agreement with the results of benchmarks, which proves that the multi -temperature heat scattering crosssection data generation method designed in this paper can meet the requirements of uranium pulsed neutron logging.