多震源地震数据偏移成像方法

多震源地震技术是一种高效的地震数据采集方法技术，得到的地震记录是来自多个震源的混合地震数据.本文在多震源波场传播理论和地震波场满足线性叠加原理的基础上，提出了两种多震源地震数据的偏移成像方法.第一种方法是首先对多震源地震数据进行分离，得到各个单震源的地震数据，然后再利用常规的偏移成像方法进行处理；第二种方法是多震源地震数据的直接偏移成像.把本文提出的多震源偏移成像方法应用于数值模拟的多震源地震数据，验证了本文方法的正确性和有效性，直接偏移成像方法较分离后再偏移方法具有更高的计算效率.

Migration methods for blended seismic data of multi-source

Multi-source seismic technology is an efficient seismic acquisition method and technology, from which a blended seismic data of multiple sources is obtained. Based on the propagation principle of blended seismic wave-fields and the linear stacking principle of seismic wave-fields, two types of migration methods for multi-source seismic data are presented in this paper. In the 1^st method, the multi-source seismic data is separated into respective seismic data of single source, which can be processed with the conventional migration method. The 2^nd method is the direct migration of the blended seismic data. Ideal and satisfactory results are obtained by applying the two kinds of migration methods to the numerical simulative blended seismic data, which show the correctness and effectiveness of the proposed methods, the direct migration method has a higher computational efficiency than migration after separation.