In order to quantitatively evaluate thin reservoir of high speed surrounding rock shielding by seismic data after time frequency conversion,the generalized S transform is applied to processing for target seismic,and then ascertain the time and frequency seismic recognition extent for thin reservoir.Combined with basic sand parameter,frequency spectral analysis,and time frequency characteristics of thin reservoir,carry out single frequency seismic optimization,and extract frequency gradient attribute to qualitatively analysis the plane distribution of sedimentary reservoir.Construct the mathematical relationship between drilling data and frequency gradient to finish quantitatively evaluation for thin reservoir.The practical example in Middle East shows that the multi-frequency interpretation techniques based on generalized S transform has a good application result for thin reservoir of high speed surrounding rock shielding,and the reservoir prediction accuracy was improved.It provides a set of technical ideas for quantitative reservoir evaluation by seismic data and has broad application prospects.
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