【摘要】 S变换是近几年发展起来的一种较新的时频转换算法,在信号的保真度、可信度及时频分辨率上较傅里叶变换、小波变换更加精细。S变换精确分频数据具有更好的时频分辨率,能够精确反映现有叠后地震资料更多的细节信息。本文应用分频数据中的低频阴影及调谐能量识别河道砂体分布,并通过调谐频率估算砂体厚度,提高了河流相储层描述的精度,应用高频能量衰减属性对砂体含油性进行判识,与已钻井结果吻合较好。更多还原

【Abstract】 The S transform is a new time-frequency transform developed in the recent years, which is more precise on the signal fidelity, reliability, and time-frequency resolution compared with Fourier transform and Wavelet transform. The data from the exact S transform frequency-division has better time-frequency resolution, which can reflect exactly more information of the poststack seismic data. The distribution of the channel sand body is identified by the low frequency shadow and tuning energy, the accuracy of the fluvial facies reservoir description are improved by the thickness of the sand body calculated with tuning frequency, the oiliness of the sand body is evaluated by the high frequency energy decay, the final results have good match with the drilling data.更多还原