关键词: 油气富集区, 沉积相, 独立分量分析技术, 地震属性, 混叠信号, 信息熵

Abstract: The subsurface geologic bodies are divided into four independent elementary structure factors,including geologic body geometry,geologic body matrix property,liquid property and noise.The seismic observation signal is equivalent to the linear aliasing signal taking above four elementary structure factors as signal source.The independent signal source can be extracted from aliasing signal by the use of independent component analysis (ICA) technique.Some available information such as petroliferous and sedimentary micro-facies information connotatively existing in seismic observation signal can be extracted.The actual geologic significance of the geologic explanation of independent signal source separated from the seismic attribute by the use of ICA technique can be given according to the existing geologic research results.This method will result in some subjective explanation,which can be reduced by the use of some mathematic methods such as information entropy.

Key words: oil-gas accumulation area, sedimentary facies, independent component analysis technique, seismic attribute, aliasing signal, information entropy