TN400 : Resolution enhancements of seismic data using discrete wavelet transform
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2013
Authors:
Abstarct: Reflection seismic method is one of the subsurface structures methods for hydrocarbon exploration. Seismic data processing is one of the key steps to extract the required information in the exploration of hydrocarbon resources. Now day using the several methods for enhancement and improve resolution seismic data. Seismic data inversion method through the spiking increases and enhancement seismic data. Spectral Rotation methods to enhancement the resolution and frequency bandwidth of seismic data is presented. Other common methods for enhancement the resolution of the seismic data is performed, a spiking deconvolution. Seismic source wavelet is function of time, then, that changes in the vertical and lateral. Also, estimated wavelet by assuming ground spectrum reflection series creating ambiguous in the estimation of reservoir properties. Therefore, the method can be with spot unstable source wavelet and estimation and subsurface effects, Increased frequency bandwidth seismic data and seismic data enhance resolution, it is very important. The method used in this thesis is using wavelet transform baxsed on extrapolated Hilbert transform. At first calculated Hilbert envelope of the input trace and this envelope be convolution with triangular smoother. Input trace divides to smooth envelopes and be normalizing to 1. With using this envelope estimate amounts and they stand on the locations considered. At end all these coefficients returned by inverse wavelet transform. This algorithm gives enhancement resolution seismic data.
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