Summary

A new methodology for picking refraction arrivals is proposed for the purpose of automatic and accurate picking of large volumes of first break picks for refraction static analysis, geometry quality control, and locating receiver stations with OBC data. Raw or processed shot records are processed through a conversion method that creates a binary raster image that focuses and emphasizes the anomalous amplitude associated with the first arrival. Analysis has demonstrated that this method can be robust with many types of data including those with large time variances in the first arrivals due to elevations changes or near surface statics. The method is also independent of the offset information for the traces so first arrival picking can be accomplished independent of the geometry definition, and the resultant picks are ideal for traditional geometry analysis methods

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