本文以准噶尔盆地南缘GMD地区的资料为例，阐述了时深转换速度场的建立过程。

Taking the data in GMD area of south margin of Djungar Basin as an example, the paper expounded the building process of time-depth conversion velocity field.

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层速度时深转换处理的效果，主要取决于所建立的时深转换速度模型的正确及合理性。

T he effectiveness of interval velocity time-depth conversion processing is mainly dependent on the correctness and rationality of the built velocity model of ti me-depth conversion.

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