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Some progress of well logging techniques during the first five years of the new millennium

ZHANG Yuan-zhong XIAO Li-zhi (University of Petroleum,Beijing 102249)  
The well logging technology has rapidly developed during the first five years of the new millennium,whichoffers multifarious technical means and the abundant information of strata for exploration and exploitation of oil andgas.The progress of the well logging techniques in the first five years of the new millennium is reviewed in this pa-per.The developing status of the borehole exploration techniques such as wireline logging,MWD(MeasurementWhile Drilling)/LWD(Logging While Drilling)and formation testing are primarily analyzed,and some of the latestlogging tools are introduced.Some fresh well logging techniques such as memory logs,downhole permanent sensor,and logging while coring etc.are also introduced in this paper.
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