Method of first arrival picking of multi-channel seismic survey data considering sound source-receiver array
AssigneeKorea Institute of Geoscience and Mineral Resources
InventorHo-Young Lee
Life of this patent
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Abstract
Provided is a method of first arrival picking of multi-channel seismic survey data considering sound source-receiver array that can increase the reliability of a first arrival selected from land seismic survey data or marine seismic survey data that includes background noise. Further, provided is a method of first arrival picking of multi-channel seismic survey data considering source-receiver array, which can improve the reliability of a first arrival or a micro earthquake occurrence location selected from measurement data of a micro earthquake seismic survey.
Claims4
A method of hyperbola-shape first arrival picking of multi-channel seismic survey data using a source-receiver distance and a velocity in a medium, comprising:
- selecting a temporary first arrival value of each trace in a seismic signal set configured to have a plurality of traces for identifying a geological structure and a characteristic and obtaining an image using an amplitude of a seismic signal and performing a normal move-out correction through a travel time formula of reflected wave using a source-receiver distance and a velocity in a medium;
- deriving a temporary line-shape first arrival expected location from the temporary first arrival values in the transform set;
- subtracting a temporary first arrival value of a large deviation from the temporary line-shape first arrival expected location in the transform set;
- deriving a true line-shape first arrival expected location from remaining temporary first arrival values in the transform set;
- deriving a true first arrival selection range by adding or subtracting an error value to or from the true line-shape first arrival expected location in the transform set;
- and
- selecting a true first arrival value within the true first arrival selection range.
Dependencies are inferred from the claim text.