Abstract
As the development of the gas and oil exploration, more and more complexity is introduced in the background setting of the exploratory area, as a result, many high resolution imaging methods arise like mushrooms after rain. In this paper, we have deduced the theory of Least Square Migration (LSM) method, and then, we test our LSM method via the SEG/EAGE salt velocity model. The image result suggests that the LSM method has a good adaptability and high image resolution for the complex media. At the same time, the comparison image result of our method and other traditional pre‐stack depth migration imaging methods, such as Fourier Finite Difference (FFD) migration method, XWFD pre‐stack migration with error compensation and the General Screen Method (GSM) shows that the LSM method has higher imaging resolution and good adaptability for the complex media, especially for the deep region of the model.
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