Fracture reservoir forecasting method based on seismic frequency division coherence attributes
A prediction method, a technique for fractured reservoirs, applied in seismic signal processing, etc.
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[0015] A fractured reservoir prediction method based on seismic frequency-division coherence attributes, the specific implementation steps are as follows:
[0016] (1) Extract the frequency-division coherent attributes of the target layer
[0017] Step 1: Wavelet frequency division attribute extraction:
[0018] ①Adopt the continuous wavelet transform of Morlet wavelet as the wavelet to analyze the seismic data in time-frequency, and transform the seismic data volume from the time domain to the frequency domain;
[0019] ②Calculate the frequency spectrum of each seismic trace at all time points, and then rearrange according to frequency to generate common frequency seismic data;
[0020] Step 2: For the single-frequency seismic data of different frequencies obtained in step 1, the third-generation coherence algorithm is used to calculate the coherent attribute volume of the single-frequency seismic data volume of different frequencies;
[0021] Step 3: Perform enhancement pr...
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