The Calibration Method Research Of Through Casing Resistivity Logging

The cased hole resistivity logging is used for developing logging, It has a strongengineering application value in confirming the saturation of remaining oil, identifying deadoil and gas formation，evaluating flooded oil layers, monitoring the saturation of fluids,locating the surface of dividing water&oil. It is very important for calibrating the cased holeformation resistivity logging to ensure the accuracy and reliability of measurement data.Compared with other conventional logging calibration system, cased hole formation resistivitylogging calibration system is more complex. It demands to simulate the changes of formationmedium parameters and current source.This paper introduces in detail the overall scheme of the casing resistivity loggingcalibration method and the problem to be solved, expatiates the measurements principle of themethod of the casing fort-nation resistivity, and analyzes the metal casing transmission linemodel and the influencing factors in actual logging.The casing resistivity logging calibration method is studied in depth, and through theprecise resistance array completed the leakage current scale, and the calibration poolcompleted resistivity scale, and brought out the processing steps and the way of resultsprocessing and analysis. Finally, through theoretical analysis and experimental validation, theimplementation scheme of the calibration method is feasible.