自然伽马基线重叠法在同位素测井中的应用  

The Application of GR Background Overlay Method to Isotope Tracer Log.

作　　者：陈必威[1] 

机构地区：[1]河南石油勘探局测井公司

出　　处：《测井技术》1999年第4期288-291,共4页Well Logging Technology

摘　　要：陈必威．自然伽马基线重叠法在同位素测井中的应用．测井技术，１９９９，２３（４）：２８８～２９１注水后，由于地层的变化很复杂，只根据同位素示踪曲线的变化判定渗透层的吸水状况、漏窜、大孔道、套管腐蚀等往往不准确。地层吸水后，其岩层的放射性物质、孔隙结构等将发生变化；套管腐蚀以后也影响伽马射线的强度。而用不同时间同位素测井中的自然伽马基线重叠法可判定以上情况。该方法已在河南油田应用，效果良好。Due to the changes of the formation parameters after water flooding, normally it is very difficult to determine accurately the water injection profile, leakage and bypass channel, pore path and casing errosion only by the variation of isotope tracer log. After water absorption of the formation, radioactive material in the rock and pore structure will change. Casing errosion will also affect the intensity of gamma ray. However, by the separation of GR background logs which are taken from isotope tracer logging run at different time, the water injection profile, leakage and channelling, pore path and casing errosion can be determined accurately. The GR background overlay method has been used in Henan Oilfield and good results are obtained.

关 键 词：自然伽马测井 重叠法 同位素测井 放射性测井 

分 类 号：P631.817[天文地球—地质矿产勘探]