钆示踪中子伽马能谱测井方法的蒙特卡罗模拟  

Monte Carlo Simulation of Gadolinium Tracer Neutron Gamma Spectroscopy Logging Method

作　　者：张锋[1] 黄隆基[1] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东东营257061

出　　处：《同位素》2007年第4期193-198,共6页Journal of Isotopes

摘　　要：利用蒙特卡罗方法分别模拟砂岩和石灰岩地层渗钆前后的热中子计数及俘获伽马能谱,研究利用渗钆前后的热中子计数率比R及俘获伽马能谱的计数比n(Gd)/n(H)确定饱和度的方法,确定R及n(Gd)/n(H)与孔隙度Φ、渗钆浓度、饱和度和岩性等影响因素的关系。The thermal neutron count and capture gamma-ray spectroscopy before and after gadolinium seeping into sandstone and limestone formation are simulated by Monte Carlo Method, and the determination method of oil saturation is studied by using the thermal neutron count rate ratio and the n（Gd）/n（H） of capture gamma spectrum before and after gadolinium seeping. In addition, the relations of ratio with influence factors such as porosity, salinity of gadolinium seeping, saturation and lithology are given.

关 键 词：钆 示踪 中子 俘获伽马能谱 蒙特卡罗模拟 

分 类 号：TL99[核科学技术—核技术及应用] TE19[石油与天然气工程—油气勘探]