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在三维地震勘探中，在利用地震数据对地层厚度、地质不连续体进行成像和直接油气检测方面，频谱分解技术提供了一种有效的方法。以滨海斜坡区碎屑岩储层为预测对象，以叠前偏移地震数据体为依托采用小波变换和短时离散傅里叶变换算法，不仅缩短运算时间，而且显著提高时频分辨率。将此方法应用于研究区目标储层进行直接油气检测，通过单频体剖面和单道频率扫描道集识别有效储层，预测其分布范围，取得了显著效果。“,”With the characteristics that high-frequency seismic wave significantly attenuate in gas reservoir, the reservoir formation and the effective distribution layer are detected. Through single-frequency section and single-frequency scanning, identify effective reservoir and prediction distribution, to provide guidance for the exploration and development.