All Kinds Of Pulsed-neutron Induced Spectrums Saturation Logging Data Processing And Interpretation Method Research

After Pulsed Neutron spectrum saturation logging technology was introduced in oilfield,there are also many problems in the practical application,such as spectral data processing and spectral data monitoring is imperfect,to determine the quality of spectral is poor.Simple models and templates cannot use in various geological conditions.Therefore we need to put forward new methods about spectral data processing,new curve's calibration and new interpretation in order to ultimately improve the coincidence rate of remaining oil interpretation.Through the research we obtain the following main results.We smooth the inelastic gamma spectrum and capture gamma,engage in the spectrum peak drift correction,access the clean inelastic gamma spectra,select generate window and get the logging curve.We use the cumulative counts of time spectrum cumulative /(the cumulative counts of Capture Spectrum + the cumulative count of clean inelastic spectra),multiple of yields,correlation's analysis methods of similar spectra to identify the difference spectrums.We use three times' filters(twice median filter,once Hamming function filter)to identify the abnormal points in the spectral,referred to as 53H's filtering technology.We use zero and drift correction to Logging curve,eliminate the effects of the instrument's working condition and the temperature.We propose shale correction,calcareous correction and Compton back down correction to carbon-oxygen,use the Herzog model to improve the accuracy of remaining oil saturation.We establish the shale content,calcium.content,porosity,oil saturation interpretation model.We apply efficiency of displacing oil to analysis flooding-level.