Goscope Project: Extracting Geological structures from Seismic Data

in: 22th gOcad Meeting, ASGA

Abstract

This paper presents the methods used to extract horizons and geological structures like faults or channel envelope from seismic data. First, we present two methods for extracting horizons. The goal is to find contiguous nodes having same environmental characteristics than an initial node located on a horizon. The first method (MaxWave) uses the maximum value of the seismic amplitude as characteristic of the environment. The second method (TrigoPol) compares the trigonometric polynomial model of the environment of a node for different increments of the phase value with the model of the reference point. The best correlated model is kept and the corresponding phase determines the location of the extracted point. Second , we present the “pattern tracker” method which consists in searching on parallel cuts of the seismic cube the same pattern defined by the values of a property inside a window, as the one of a first reference point. So, we may track a same environment such as border of a fault or envelope of a channel in contiguous cuts of the cube. If we start from several points on a cut along the fault or the channel it’s so possible to extract points on these geological structures. We also present a tool using the pattern tracker to automatically extract curves from a seismic cut.

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    BibTeX Reference

    @inproceedings{BouchetRM2002,
     abstract = { This paper presents the methods used to extract horizons and geological structures like faults or channel envelope from seismic data. First, we present two methods for extracting horizons. The goal is to find contiguous nodes having same environmental characteristics than an initial node located on a horizon. The first method (MaxWave) uses the maximum value of the seismic amplitude as characteristic of the environment. The second method (TrigoPol) compares the trigonometric polynomial model of the environment of a node for different increments of the phase value with the model of the reference point. The best correlated model is kept and the corresponding phase determines the location of the extracted point. Second , we present the “pattern tracker” method which consists in searching on parallel cuts of the seismic cube the same pattern defined by the values of a property inside a window, as the one of a first reference point. So, we may track a same environment such as border of a fault or envelope of a channel in contiguous cuts of the cube. If we start from several points on a cut along the fault or the channel it’s so possible to extract points on these geological structures. We also present a tool using the pattern tracker to automatically extract curves from a seismic cut. },
     author = { Bouchet, Pierre AND Jacquemin, Pierre AND Mallet, Jean-Laurent },
     booktitle = { 22th gOcad Meeting },
     month = { "june" },
     publisher = { ASGA },
     title = { Goscope Project: Extracting Geological structures from Seismic Data },
     year = { 2002 }
    }