Signal processing method for tight sandstone gas-bearing reservoir

• Main Authors: HU LIN, SUN WANYUAN, PEI JIANXIANG, WANG RUI, LI FANG, SONG YUANWEI, CHEN HUI, CHEN ZHIHONG
• Format: Patent
• Language: Chinese; English
• Published: 30.07.2024
• Subjects: DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The invention relates to the technical field of seismic signal processing, in particular to a signal processing method for a tight sandstone gas-bearing reservoir, which comprises the following steps: S1, inputting a seismic signal x (u) to be analyzed, where u represents time; s2, calculating a frequency rotation operator, a frequency translation operator and a phase translation operator, and taking the product of the three operators as a multi-core time frequency operator; and S3, constructing a spline kernel chirplet transformation function according to the multi-kernel time-frequency operator. The seismic signal time-frequency analysis method overcomes the defects that in the prior art, a time-frequency analysis method can only analyze the instantaneous frequency of a single-component signal and cannot analyze the instantaneous frequency of a multi-component signal, so that the accuracy and the reference performance of an analysis result are low. According to the invention, the instantaneous frequency of