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《Well Logging Technology》 2011-05
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Analysis of Abnormal Logging Responses in Tahe Oilfield

LUO Rong~1,LI Shuanglin~2,CUI Guang~1 (1.Engineering Supervision Center,Northwest Oilfield Company,SINOPEC,Luntai,Xinjiang 841600,China; 2.Well Logging Company,Shengli Petroleum Administration,Dongying,Shandong 257096,China)  
Due to the complex and changeble geological structures and the wellbore conditions in Tahe oilfield,there exist some abnormal responses in the logging curves.Analysed are the abnormal density,SP,resistivity curve responses partly caused by unconformity surfaces,mineral compositions,drilling fluids and wellbore trajectories,etc.The abnormal responses not caused by logging tool properties are normal responses to the complex logging conditions,which are only different from that of conventional and fixed log environments,so these curves should not be taken as poor quality curves.When the log data are not consistency with the geologic laws and the required standards,it is necessary to analyse the drilling logging data as well as the tool's performance,etc.,so to find out why there occure the abnormal responses.This study is quite helpful to the quality monitoring of field data and the later log research.
【CateGory Index】: P618.13;P631.81
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