The invention relates to a method for partitioning glutenite sedimentary period based on a Fischer diagram. The method comprises the following steps: selecting
logging curve combination, discriminating a lithological change surface, discriminating a high-frequency base-level cycle, determining the preferred period of the high-frequency base-level cycle, determining the accuracy of partitioning the high-frequency base-level cycle, making Fischer diagrams, and partitioning a long-term base-level cycle. The method can be used for constructing the corresponding relationship between lithofacies and the
logging curves by analyzing the lithofacies, can be used for selecting the
logging curve combinations which can well reflect the lithologic characters to carry out clustering analysis, main
composition analysis and
polynomial regression analysis so as to determine the lithological change, and can be used for partitioning a high-frequency cycle
base level by using the logging curve combination, lithological change level and discrete
wavelet high-frequency component, and adopting time-
frequency analysis technique to acquire the high-frequency preferred cycle period of the logging curve to inspect the partitioned high-frequency cycle
base level. On this basis, the Fischer diagrams are made to obtain curves reflecting the change of the
base level so as to partition the sedimentary period.