蒙特卡罗方法在脉冲中子测井中的应用  

Application of Monte Carlo Method in the Pulsed Neutron Logging

作　　者：张锋[1] 孙燕[2] 

机构地区：[1]中国石油大学地球资源与信息学院,山东东营257061 [2]中国石油化工股份有限公司胜利油田东辛采油厂,山东东营257061

出　　处：《同位素》2005年第1期21-25,共5页Journal of Isotopes

摘　　要：利用蒙特卡罗中子-粒子输运程序(MCNP)分别模拟了不同脉冲宽度的脉冲中子源产生的中子与地层作用过程中,各种能量的中子和热中子的时间谱;利用不同孔隙度、矿化度、含水饱和度等条件下的热中子时间谱,分析得出储层的宏观俘获截面和孔隙度、矿化度以及饱和度的线性关系,为PNN(脉冲中子-中子)测井方法的理论研究提供了依据。The time spectrum of all kinds energy neutrons and thermal neutrons, which resulted from the interaction between the formation and neutrons induced by the pulsed neutron source of the different pulsed width, are simulated by Monte Carlo Neutron-particles code. The time spectrum of thermal neutrons under the conditions of the different porosities, salinities and saturations are simulated. The linear relations between formation macroscopic cross sections and porosity, salinity and saturation are gained by the time spectrums, respectively. The results will lay the foundation for the study of PNN logging.

关 键 词：MCNP 脉冲中子测井 热中子时间谱 宏观截面 

分 类 号：O242.2[理学—计算数学] TE319[理学—数学]