This literature review highlights most of the highly referenced work on amplitude variation with offset (AVO) from the past three decades. This review addresses some of the approximations made to the Zoeppritz equations, as well as AVO processing, AVO analysis and inversion. The purpose of this paper is not to provide details of the different AVO methods, but instead to register in chronological order the developments and briefly present the purpose and the outcome of each study. In some instances, I presented a comparison with other methods or listed advantages and disadvantages of one AVO process over the other.
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