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The Research of Adaptive Spectral Modeling Deconvolution

Author: WangDeYing
Tutor: WangYanGuang；LiZhenChun
School: China University of Petroleum
Course: Earth Exploration and Information Technology
Keywords: Spectral Simulation Deconvolution Adaptive Hilbert-Huang Transform
CLC: P631.4
Type: Master's thesis
Year: 2011
Downloads: 79
Quote: 0
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Abstract


With the lithological exploration technology development, people's quality of seismic data and processing accuracy requirements are high, more and more attention around the seismic data processing amplitude, frequency, phase, waveforms remain dynamic characteristics of relativity. Requires not only the amplitude of the reflection coefficient to reflect the correct position, but also on the amplitude of the reflection coefficient reflecting the real magnitude of the relative change between the situation before and after the amplitude can be expected to reflect the true reservoir and lithology changes and changes in light reflectance RESERVOIR Consistency between characteristics is not destroyed. The degree of correspondence between maintaining a direct impact on the quantitative analysis of reservoir lithology and geological phenomena explain accuracy. For in order to improve the time resolution seismic data for the purpose of deconvolution method, the fundamental relaxation deconvolution method assumptions, deconvolution methods to improve the adaptability, but also improve the deconvolution fidelity of a development direction. This paper analyzes the spectral deconvolution method simulation based on the characteristics, according to the model of the traditional spectral simulation technology parameter selection method, summed up the principle of preference, and to quantify the value of the parameter selection form to provide guidance, to avoid a lot of tedious experimental parameters, to a certain extent, to ensure the quality of deconvolution. After seismogram energy compensation, stacking and other processing, to a certain extent, changed the amplitude spectrum shape, broadening the sub-wave band, the experiment found that the traditional method of neutron wave spectrum simulation model formula is not well described after treatment change in the amount of sub-wave amplitude spectrum for traditional spectral simulation method this limitation, combined with nearly ten years of development up in the Hilbert-Huang transform EMD technology curve fit residuals Trend Extraction estimated the remaining sub-wave amplitude spectrum. Based on analysis of the reflection coefficient derivation non-white noise component and the normalized autocorrelation recourse against wave amplitude spectral estimation error influence, based on the assumption of a white noise autocorrelation estimates erupted wave characteristics, this feature coincides with the spectral characteristics of simulation methods formation of complementary advantages, the two combine to form adaptive spectral simulation technology, whether the reflection coefficient is white noise sequence or non-white noise sequence, are able to get a more accurate estimate of the sub-wave amplitude spectrum, improved spectral simulation methods to adapt , stability and fidelity performance.

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Seismic exploration
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