Abstract:

In order to effectively identify and accurately evaluate the Triassic fractured tight-sandstone reservoirs featured in'double porosity medium',the author strengthened geological application research of the electro-imaging logging data and improved its applications to qualitative identification and quantitative evaluation of fractures,formation occurrence description,analysis around wells,earth stress analysis and lithologic discrimination,and etc.Core data were used to calibrate electro-imaging logging(EMI),which was used in turn to calibrate conventional general well-logging.The log responses of the Triassic fractured sandstone reservoirs are summarized under the constraints of geologic conditions and test data.And based on all these,the author proposed a set of effective method for classifying fractured reservoirs.The testing results of ten wells indicate that the coincidence rate of log interpretation with the method is up to 84.3%.The application of the log interpretation of fractured reservoir improves the fractured reservoir identification through well-logging.

Key words: fracture identification, fracture parameter, log response, fractured reservoir classification, Triassic, Dongpu Sag