【摘要】 分频技术是目前开展薄互层预测的一种重要手段,但实际应用时问题比较多。试图通过正演模型开展薄互层地震响应特征分析来探讨分频技术的适用条件。认为与单砂层相比较,薄互层地震振幅与砂岩百分含量成指数关系,并含有更为丰富的频率信息;当薄互层组厚度小于1/4λ、总厚度变化小于1/8λ、砂岩百分含量变化小于20%时,可以应用分频技术开展薄互层储层预测。更多还原

【Abstract】 Spectral decomposition is widely used in the thin-interbed prediction,though the condition of suitable applicability is not clear.In this paper,we build a forward modeling of seismic response to thin-interbed and find the suitable condition of spectral decomposition.The forward modeling of seismic response to thin-interbed indicates that there would exist the exponential relationship between seismic amplitude and percentage of sandstone in thin-interbed,and more frequency information for the thin-interbed contains than single sand layer occur.On condition that the thickness of thin-interbed is thinner than λ/4,total vibration of thickness less than λ/8,sandstone percentages less than 20%,the spectral decomposition technology is useable in the prediction of thin-inerbed sandstone.更多还原