Aleksey B Pankratov

US Patent:

20040019428, Jan 29, 2004

Filed:

Jul 26, 2002

Appl. No.:

10/206650

Inventors:

Roger Young - Houston TX, US
Aleksey Pankratov - Houston TX, US
John Greve - Sugarland TX, US

International Classification:

G06F019/00

US Classification:

702/018000

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.