Application of Kirchhoff PSTM to seismic data of complex structure
克希霍夫叠前时间偏移技术在复杂构造带地震资料处理中的应用

The area studied is located in the central segment of the eastern subbasin of the Liaohe oilfield.Athough the seismic profile processed before reflects the whole configuration,its imaging effect is not very perfectable.So we develop prestack time migration.We introduce the theory of Kirchhoff PSTM and pre-process steps for PSTM,discussing the primary testing and choice methods of PSTM parameters.We use the Deregowski iterative method and the different percent velocity scanning of PSTM to create and improve the velocity model.The result demonstrates that the method of Kirchhoff PSTM has improved the seismic profile greatly.