蒙特卡罗方法在核测井中的应用  

Application of Monte Carlo method in nuclear logging

作　　者：吴晓龙 邱飞 周良文[1] WU Xiaolong;QIU Fei;ZHOU Liangwen(Well Tech Department,China Oilfield Services Co.,Ltd.,Langfang 065201,Hebei,China)

机构地区：[1]中海油田服务股份有限公司油田技术事业部,河北廊坊065201

出　　处：《石油地质与工程》2024年第4期39-43,51,共6页Petroleum Geology and Engineering

摘　　要：蒙特卡罗方法在医学、高能物理、核物理、加速器物理、耦合中子/光子/电子输运问题等方面具有广泛的应用,常用的蒙特卡洛数值模拟软件有Geant4(欧洲)、FLUKA(欧洲)、MCNP(美国)、EGSnrc(加拿大)、SuperMC(中国)。以中海油服自主研发的新一代过套管剩余油气饱和度测井仪器RET为例,建立蒙特卡罗数值模拟模型,通过仪器测量适用性范围和sigma拖尾现象分析,认为RET仪器在印尼某油田C/O模式下孔隙度下限为18%,sigma拖尾为岩性导致而非孔隙含气,以此展示蒙特卡洛方法在核测井领域的应用。Monte Carlo method has a wide range of applications in medicine,high energy physics,nuclear physics,accelerator physics,coupled neutron/photon/electron transport problems,etc.Commonly used Monte Carlo numerical simulation software includes Geant4(Europe),FLUKA(Europe),MCNP(USA),EGSnrc(Canada),SuperMC(China).The Monte Carlo numerical simulation model is established by taking RET,a new generation residual oil and gas saturation logging instrument independently developed by China Oilfield Services Limited.Through the analysis of instrument measurement applicability range and sigma tailing phenomenon,it is believed that the lower limit of porosity of RET instrument in C/O mode of a certain oilfield in Indonesia is 18%,and sigma tailing is caused by lithology rather than pore gas content.Therefore,the application of Monte Carlo method in the field of nuclear logging is demonstrated.

关 键 词：蒙特卡罗方法 RET仪器 测井应用 含气饱和度 

分 类 号：TE19[石油与天然气工程—油气勘探]