Event continuity mapping using seismic frequency analysis
AssigneeSaudi Arabian Oil Company
InventorsMaher I. Almarhoon, Wisam AlKawai
Life of this patent
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Abstract
Methods and systems for identifying a multiple artifact are disclosed. The method includes obtaining a post-stacked seismic image of a subterranean region and identifying a horizon with the post-stacked seismic image. The method further includes determining a spectral section over the horizon by applying spectral decomposition to the post-stacked seismic image. The method still further includes detecting a frequency anomaly within the spectral section by comparing the spectral section to a reference spectral section and identifying the multiple artifact based on the frequency anomaly.
Claims12
A method of identifying a multiple-artifact, comprising:
- obtaining a post-stacked seismic image of a subterranean region;
- identifying a horizon and a reference horizon within the post-stacked seismic image,
- wherein the horizon and the reference horizon are different horizons;
- determining a spectral section over the horizon by applying spectral decomposition within a frequency range to the post-stacked seismic image within the horizon;
- determining a reference spectral section over the reference horizon by applying spectral decomposition within the frequency range to the post-stacked seismic image within the reference horizon;
- detecting a frequency anomaly within the spectral section by comparing the spectral section to the reference spectral section;
- identifying the multiple-artifact based on the frequency anomaly;
- determining a wellbore path based upon the post-stacked seismic image and the multiple-artifact;
- and
- drilling a wellbore based, at least in part, upon the wellbore path.
A system, comprising:
- a seismic acquisition system configured to obtain a post-stacked seismic image of a subterranean region of interest;
- a computer system configured to:
- receive the post-stacked seismic image,
- identify a horizon and a reference horizon within the post-stacked seismic image,
- wherein the horizon and the reference horizon are different horizons,
- determine a spectral section over the horizon by applying spectral decomposition within a frequency range to the post-stacked seismic image within the horizon,
- determine a reference spectral section over the reference horizon by applying spectral decomposition within the frequency range to the post-stacked seismic image within the reference horizon,
- detect a frequency anomaly within the spectral section by comparing the spectral section to the reference spectral section,
- identify a multiple-artifact based on the frequency anomaly, and
- determine a wellbore path based upon the post-stacked seismic image and the multiple-artifact;
- and
- a drilling system configured to drill a wellbore based, at least in part, upon the wellbore path.
Dependencies are inferred from the claim text.