On Economical and Practical Optimization Evaluation Method for Tight Gas Reservoir Logging Series in the Eastern Part of SLG

Based on the analysis of lithology identification,reservoir characteristics,and oil/gas property of tight gas reservoirs in the eastern part of SLG,and by using multi-parameter logging statistics of more than 500 different types of reservoirs from over 50 wells within the region,optimization effectiveness evaluation of more than 10 different series of traditional logging technologies in lithology and physical property classification,and gas content assessment are performed,and the rules of choosing economic and suitable logging technology series in the process of tight gas reservoir evaluation are put forward.Real cases are also used to analyze practical application results of the rules.It revealed that density logging and sonic logging are the best in porosity series,spontaneous potential logging and natural gamma ray spectrometry logging present better performance in lithology series,and high resolution array induction logging excels others in resistivity series.This study provides reliable basis for enhancing material collection and in-depth application of logging series,developing new technologies and new projects,and implementing economic and suitable logging series,all of which effectively have increased the ability to identify and evaluate tight gas reservoir.