【摘要】 利用公式推导和模型模拟方法,对油层界面的反射系数与油层声波阻抗之间的函数关系进行研究,得出油层声波阻抗变化决定的时移地震的差异振幅和差异波形特征。结果表明:油层的声波阻抗增大,该界面对应的地震反射系数增大,反之,地震反射系数减小;油层声波阻抗变化趋势(增大或减小)决定差异波形振幅幅度变化的快慢,油层声波阻抗减小比同等数值声波阻抗增大导致差异波形振幅幅度大。实际资料的处理结果验证了上述结论的可靠性。更多还原

【Abstract】 Through formula deduction and model simulation,the certain function relationship was researched between the seismic reflection coefficient and acoustic impedance change of oil layer.The results show that the amplitude and waveform characters of difference seismic depend on the oil layer acoustic impedance change.If the oil layer acoustic impedance increases,the seismic reflection coefficient of the oil layer boundary increases.Conversely,the seismic reflection coefficient decreases.The tendency of oil layer acoustic impedance controls the velocity of seismic reflection waveform amplitude variation.The amplitude of differential seismic waveform caused by acoustic impedance decrease is greater than the one caused by equivalent acoustic impedance increase.The production data research results verify the reliability of the conclusions.更多还原