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由于三维地震勘探具有高密度采集、高精度以及多种灵活的显示方式等优点，因此利用三维地震资料研究地层岩性变化，预测物源方向，划分沉积体系和沉积相带，寻找砂岩发育区，评价含油气有利区块，已经是油气勘探的客观要求。本文所研究的三维地震工区位于吐哈盆地台北凹陷西部，至储层研究工作开展以前，已钻井４口，获得的油气产量甚低，结果难以令人满意。为此，以全三维地震偏移资料为基础的岩性圈闭研究得以开展。该项研究立足于三维地震工区的地质特点，结合钻井、测井等资料，利用地震微相、沉积微相、成藏条件分析等方法，确定了砂体的平面展布特征，预测了隐蔽的岩性圈闭，指出了研究区油气勘探的有利目标。
Due to the advantages of high density acquisition, high precision and flexible display methods, 3D seismic data are used to study the lithologic changes of strata, predict the source direction, divide the sedimentary system and sedimentary facies, and search for the sandstone development area. Assessing favorable oil and gas blocks has become an objective requirement for oil and gas exploration. The 3D seismic work area studied in this paper is located in the western part of the Taipei depression of the Turpan-Hami basin. Before the reservoir research was carried out, 4 wells have been drilled and the oil and gas production obtained is very low. The results are unsatisfactory. Therefore, the research on lithologic traps based on full three-dimensional seismic migration data has been carried out. Based on the geological characteristics of the 3D seismic work area, combining the data of drilling and well logging, the study made use of the methods of seismic microfacies, sedimentary microfacies and reservoir forming conditions to determine the plane distribution characteristics of the sand body and predicted the concealed Lithologic traps, pointing out the favorable targets for oil and gas exploration in the study area.