Back to results
US 4,598,392 AGranted
Vibratory signal sweep seismic prospecting method and apparatus
AssigneeMobil Oil Corporation
InventorKeh Pann
Life of this patent
Estimating the term…
Abstract
Disclosed are a method and apparatus for vibratory seismic prospecting in which a vibratory signal sweep is produced by a vibrating apparatus in accordance with a power spectrum function S(f), which is proportional to a noise component function n(f) and a subsurface signal amplitude attenuation function B(f) for an area to be surveyed, to thereby produce reflection signals having an improved signal-to-noise ratio.
Claims25
A method for seismic surveying using a vibratory signal sweep comprising the steps of:
- determining a frequency domain subsurface amplitude attenuation function B(f) for a frequency spectrum existing between frequency components f.sub.1 and f.sub.2 for a subsurface area to be surveyed;
- determining a frequency domain noise component function n(f) associated with said area for said frequency spectrum;
- and
- producing a vibratory sweep signal over said frequency spectrum which has a frequency domain power spectrum function S(f) which is a function of said subsurface amplitude attenuation function B(f) and said noise component function n(f).
1 more element
An apparatus for vibratory sweep signal seismic prospecting comprising:
- means for generating a vibratory sweep signal over a frequency spectrum existing between a first frequency f.sub.1 and a second frequency f.sub.2, said vibratory sweep signal having a frequency domain power spectrum function S(f) which is a function of a frequency domain amplitude attenuation function B(f) and a frequency domain noise component function n(f) over said frequency spectrum for a subsurface area to be surveyed;
- and
- means responsive to said signal generating means for vibrating an earth formation with said vibratory sweep signal.
Dependencies are inferred from the claim text.