Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1987-05-26
1989-03-28
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 75, 364421, G01V 136, G01V 128
Patent
active
048170607
ABSTRACT:
A process for directly detecting the presence of hydrocarbons in a rock formation includes generating a plurality of seismic rays at spaced intervals from one another above or within the surface of the rock formation being surveyed to form a normal move-out corrected common mid-point gather; determining an approximate angle of incidence for each seismic ray; applying predetermined weighting factors to time samples of each of the reflected rays before stacking the time samples to form a trace; extracting the reflectivity of compressional longitudinal waves (p-waves) and shear waves (s-waves) of each sample; determining the p-wave reflectivity as a function of the s-wave reflectivity; and subtracting the p-wave reflectivity so determined from the extracted p-wave reflectivity thereby to define a fluid factor which gives a direct indication of the presence of hydrocarbons in the rock formation being surveyed.
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Moskowitz Nelson
Soekor (Proprietary) Limited
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