碳氧比能谱测井原理及应用

Theory and application of the C/O energy spectrum logging

利用碳和氧元素作为地层中石油和水的指示元素,向地层发射中子脉冲束,中子与碳、氧原子发生核反应产生非弹性散射伽马射线,通过对伽马射线进行能谱分析,能确定地层中的含油饱和度,监测石油产量,并在套管井中确定油层位置,为石油开采提供重要的地质信息。文中介绍了快中子非弹性散射能谱测量原理,基于该原理的碳氧比能谱测井方法及其在石油测井中的应用。

The use of carbon and oxygen as the designation elements of the oil and water in the strata,to launch the neutron beam pulses toward the strata,the nuclear reaction produce inelastic scatteing gamma-rays,to analyse the gamma-ray spectrum of carbon and oxygen,use to determine the geological information of the oil saturatione,monitoring oil yield and fix oil layer position in the sleeve well,and provide the important geological informations for exploitation of petroleum.The article introduces the principle of the fast neutron inelastic scatteing spectrum measurement,the C/O spectrum logging methods and the application in oil field base on the principle.