基于谱分解技术的储层定量地震解释

doi:10.11743/ogg20110510

Abstract

Abstract:

Spectral decomposition is a new technique for seismic reservoir research that transforms seismic data from time domain to frequency domain by discrete Fourier transform or maximum entropy approach.According to the theory of seismic wave propagation,this paper deduces the amplitude spectrum expression of thin beds and confirms their notches characteristics of spectrum,i.e.the reciprocal of notches period equals to the temporal thickness of thin bed.With this principle,we discuss ideas and methods of estimating reservoir thickness based on spectral decomposition.In practice,quantitative interpretation of reservoir thickness is realized by establishing a precise velocity field of targets and computing the first spectral peak frequency in target tuning cube.The application shows that the prediction results are consistent with the drilling data,indicating they are credible.Spectral decomposition provides a new approach and method for quantitative seismic interpretation of reservoirs and has broad application prospects.

Key words: tuning cube, velocity field, quantitative seismic interpretation, spectral decomposition, reservoir prediction

CLC Number:

P631.4

Bian Li'en, Yu Qian, Han Zijun, Chen Binbin. Quantitative seismic interpretation of reservoirs based on the spectral decomposition technique[J]. Oil & Gas Geology, 2011, 32(5): 718-723.

References

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Quantitative seismic interpretation of reservoirs based on the spectral decomposition technique

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