METHOD OF SEISMIC SIGNAL PROCESSING
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United States of America Patent
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Jan 20, 2004
Grant Date -
Jan 29, 2004
app pub date -
Jul 26, 2002
filing date -
Jul 26, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A method of seismic analysis is disclosed for determining geopressures or seismic velocities or other formation attributes. In one embodiment, a frequency related attribute is determined from seismic data by analysis of the frequency content of one or more signal traces. Geopressure or velocity may then be derived from the frequency related attribute without reliance on moveout techniques. In another embodiment, a derivative of a maximum value of pore pressure is utilized to determine a transition zone whereby the derivative peaks and then recedes. The lithology is then examined to determine a formation directly below the transition zone at which an overpressure may exist.
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