作　　者： ; ;

机构地区： 长江大学地球物理与石油资源学院教育部油气资源与勘探技术重点实验室

出　　处： 《石油天然气学报》 2010年第5期84-89,共6页

摘　　要： 由于现有仪器都是相对于传统的液体泥浆环境条件设计和刻度的,当井孔介质为气体时,现有仪器不能直接适用。采用不同井眼介质测井资料的对比分析方法,分析了气体井眼介质条件下自然伽马、密度和补偿中子测井资料的响应特征,提出了气体钻井测井资料的密度和中子测井校正方法。采用MonteCarlo数值模拟方法对液体和气体介质补偿中子测井进行了数值模拟,分析了井眼介质不同时的探测器热中子通量同源距乘积与源距的关系、热中子计数率随孔隙度变化规律、长短源距热中子计数率关系以及长短源距热中子计数率比值关系,验证了气体井眼介质条件下实际测井响应特征。 Because of the existing well logging tools were designed and calibrated to the traditional hole environment of liquid mud,when gas was used as a hole medium these well logging tools could not be directly deployed to the hole environment.Based on the comparative analysis of different well logging data,the well logging response characteristics of natural gamma,density and compensated neutron in the gas medium were analyzed,the method for correcting the density and compensated neutron logging data in the condition of gas drilling logging was proposed.The method of Monte Carlo numerical simulation is used to compensate neutron logging under the hole environment of liquid and gas hole medium.Through the numerical simulation,the relation between source spacing and the product of the thermal neutron flux and source spacing are,the relation between thermal neutron count rates and porosity,the relation between far and near source spacing count rates,and the relation of far and near source spacing count rates ratio between liquid and gas hole medium are also analyzed.The well logging response characteristics are proved under the condition of gas drilling logging.

关 键 词： 气体介质钻井测井 自然伽马测井 补偿中子测井 密度测井 数值模拟

领　　域： [天文地球] [天文地球]