Seismic sedimentology is a new-rising subject that uses 3-D seismic data to study sedimentary rock and its formation process and also an emerging interdisciplinary science followed by the seismic stratigraphy and the sequence stratigraphy. The study emphasizes that seismic events are not necessarily isochronous. It has presented a good application prospect in oil-gas exploration and development by studying sedimentary microfacies under the isochronous stratigraphic architecture with major research techniques like 90°-to-phase conversion, strata slicing technology and spectral decomposition technology in combination with other geophysical technologies. The paper has provided a reliable basis for searching concealed oil-gas reservoirs by further interpreting and recognizing the structures, elaborately implementing lithologic-structural composite traps and expanding oil reservoir areas with the above three key technologies which are applied to carry out the seismic sedimentology research on the oil-group sequences under the Triassic strata of the Tahe Oilfield.%地震沉积学是应用三维地震资料研究沉积岩及其形成过程的新兴学科，是继地震地层学、层序地层学之后的又一新兴边缘交叉学科。地震沉积学研究强调地震同相轴并不一定是等时的，它以90°相位转换技术、地层切片技术和分频解释技术为主要研究手段，结合其他地球物理技术进行等时地层格架下的沉积微相研究，在油气勘探与开发中展示出了良好的应用前景。因此本文利用90°相位转换技术、地层切片和分频解释技术三项关键技术，对塔河油田三叠系下油组层序进行了地震沉积学的研究，并借此方法技术进行了构造再解释、再认识，精细落实了岩性+构造复合型圈闭，扩大了油藏面积，为寻找隐蔽性油气藏提供了可靠的依据。
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