Method of seismic surveying for stratigraphic traps

Communications: electrical – Selective – Having electron beam device

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340 155TC, 340 155TG, G01V 120, G01V 128

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active

040084590

ABSTRACT:
A method for recognizing the presence of and defining the location of a subsurface stratigraphic trap by seismic exploration is disclosed wherein a common depth point seismic source-detector spread is in effect moved along a prospecting line along the surface of the earth. The apparent stacking velocity to a plurality of selected subsurface reflectors is obtained at each common depth point location and is plotted as a function of horizontal distance. Differentials in the stacking velocity plots are compared to provide an estimate of the horizontal location along the survey line of subsurface stratigraphic traps. Additionally, a technique for determining the approximate depth of such traps is disclosed.

REFERENCES:
patent: 3412373 (1968-11-01), Ellis
patent: 3638176 (1972-01-01), White
patent: 3681748 (1972-08-01), Diltz
patent: 3921126 (1975-11-01), Waters
Man, "Seismic Stratigraphic Exploration-Part III", 8/71, pp. 676-689, Geophysics, vol. 36, No. 4.
Adler, "Geophysical Exploration for Stratigraphic Oil Traps", 10/43, pp. 337-347, Geophysics, vol. 8, No. 4.

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