Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1998-08-14
2000-02-22
Oda, Christine
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 37, 367 47, 367 59, 367 49, G01V 100
Patent
active
060288205
ABSTRACT:
A method for seismic data interpretation for the purposes of identification of oil, gas and water accumulation locations and delineation of their contours uses a model of discrete media with inhomogeneous stresses. For a selected reflection horizon, the relative value of overall pressure gradient is calculated on the basis of instantaneous amplitudes and frequencies of seismic signals using a derived relationship between the reflection coefficients of elastic waves and the stress condition parameter. The calculation technique uses estimates of instantaneous amplitudes and frequencies smoothed over the entire seismic horizon or its fragment. A generalized model of normal (lithostatic) pressure is excluded, and the final interpreted parameters have the sense of relative estimates of anomalous pressure caused by basin dynamics. Maps of anomalous relative pressure and isochronal maps corrected for signal frequency variations along the reflection horizon are constructed using tracking of one or more seismic horizons. The regions of low anomalous pressure within the analyzed fragment of a time section coincident with favorable geometry and specific patterns of the reflection time map are the most probable locations of the accumulations of fluids.
REFERENCES:
patent: 4535417 (1985-08-01), Peacock
patent: 4633399 (1986-12-01), Stebens et al.
patent: 4633447 (1986-12-01), Bodine
patent: 4780859 (1988-10-01), Hadidi et al.
patent: 5134590 (1992-07-01), Garotta
patent: 5136552 (1992-08-01), Kelly et al.
patent: 5136554 (1992-08-01), Thomsen et al.
patent: 5268994 (1993-12-01), Keskes
patent: 5311484 (1994-05-01), Anderson et al.
patent: 5408441 (1995-04-01), Barr et al.
patent: 5463594 (1995-10-01), Lindsey et al.
patent: 5475589 (1995-12-01), Armitage
patent: 5508973 (1996-04-01), Mallick et al.
patent: 5555218 (1996-09-01), Chambers et al.
patent: 5586082 (1996-12-01), Anderson et al.
"Velocities of Seismic Waves in Porous Rock", M. Nafi Toksoz, et al; Geophysics, vol. 41, No. 4 (Aug. 1976), pp. 621-641.
Jolly Anthony
Oda Christine
Reid John S.
Trans Seismic International, Inc.
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