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测井是世界石油工业中高技术含量最多的产业部门之一，在油气勘探中使用测井高技术，能取得高的效益。测井经历了数字测井技术、数控测井技术和成像测井技术三大阶段，西方国家使用成像测井技术已经规模化，而我国尚处在起步阶段。成像测井仪有电成像测井仪和声成像测井仪，正在研究中的还有阵列核成像测井仪和磁共振成像测井仪。据统计，运用成像测井技术勘探复杂油气藏，油气储量还可以再增加１０％以上。我国已在大庆、胜利、新疆、四川等油气田使用成像测井技术，发现了一些勘探难度极大的油气藏。

DEVELOPMENT AND PROGRESS IN LOG HIGH TECHNIQUES

??Well log is one of the industrial departments of extensively adopting high techniques in the world petroleum industry.The benefits can be enhanced through using log high techniques in oil and gas exploration.Three large stages,i.e.the digital log,numerically-controlled log and imaging log techniques have been undergone in well log.The imaging log technique has been extensively used in the Western countries,however,it is still in its beginning stage in China.The imaging logging instruments include the electric imaging logging instrument and acoustic imaging logging instrument,as well as the array nuclear imaging logging instrument and nuclear magenetic resonance imaging logging instrument which are under development.Through exploring the complex oil and gas reservoirs by use of the imaging logging techniques,the oil & gas reserves will be also increased by more than 10%.In China,the imaging logging techniques have been used in many oil and gas fields in Daqing,Shengli,Xinjiang and Sichuan,etc.,and some oil and gas reservoirs which are very difficult to explore have been found.