波形分类技术在鄂北薄砂岩储层预测中的应用

doi:10.11743/ogg20120406

Abstract

Abstract:

During the deposition of fluvial sand body,various lithological assemblages can be formed due to different spatial distribution and thickness of sandstones and mudstones,and their corresponding seismic reflections have different waveform patterns.The technique of the neural network waveform classification can be used to analyze and summarize their seismic waveforms,and then predict regional distribution of sandstone sedimentary facies.Considering the low resolution of the seismic data and the thin thickness of sand layers,it is necessary to do a band spread processing with fidelity.However,this processing should be based on higher correlations between wells and seismic data and stable lateral amplitude trends.According to the sedimentary characteristics of the 3rd member of the Permian Xiashihezi Formation in Daniudi gas field in the Ordos Basin,we performed correlation and classification of seismic waveforms which reflect different lithological assemblages by using the neural network waveform classification technique,and predicted the distribution of several sandstone sedimentary models.Comparison with well data-based sandbody distribution map shows that they are consistent.The technique is quick and effective for sandbody prediction and has a better resolution for thin sand bodies.

Key words: fluvial faces, waveform classification, seismic, sand body, Daniudi gas field, Ordos Basin

CLC Number:

TE132.1

She Gang, Zhou Xiaoying, Dai Mingang, Liu Weidong. Application of seismic waveform classification technique in thin sandstones reservoir prediction in northern Ordos Basin[J]. Oil & Gas Geology, 2012, 33(4): 536-540.

References

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Application of seismic waveform classification technique in thin sandstones reservoir prediction in northern Ordos Basin

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