Wavseis sourcing
AssigneeConocoPhillips Company
InventorsPeter M. EICK, Joel D. BREWER
Life of this patent
Estimating the term…
Abstract
Improved methods of providing acoustic source signals for seismic surveying, wherein a plurality of signals can be easily separated from one another after data acquisition, wherein the source signals are not sweep based.
Claims24
A plurality of seismic source signals for seismic surveying, said each seismic source signal having a length t, a plurality of frequencies and a plurality of amplitudes at a plurality of times, wherein said plurality of frequencies and plurality of amplitudes do not vary sequentially by more than 6 notes, and wherein said plurality of seismic source signals are each unique and do not substantially overlap in frequency and amplitude and rhythm such that they can be distinguished from each other.
A plurality of n seismic source signals for seismic surveying, said each seismic source signal having a length t (t1, t2 . . . tn), and having a pattern p (p1, p2 . . . pn), comprising a plurality of frequencies and a plurality of amplitudes at a plurality of times, wherein said plurality of frequencies and plurality of amplitudes do not vary sequentially over an entirety of said length, and wherein said plurality of seismic source signals patterns (p1, p2 . . . pn) do not substantially overlap in frequency, rhythm or amplitude such that they can be distinguished from each other.
A method of acquiring seismic survey data, comprising:
- a) providing one or more electric or hydraulic vibratory sources;
- b) each vibratory source providing a different acoustic signal pattern p (p1, p2 . . . pn), having a length t (t1, t2 . . . tn);
- c) each pattern (p1, p2 . . . pn) comprising a plurality of frequencies and a plurality of amplitudes, wherein said plurality of frequencies and plurality of amplitudes do not vary sequentially;
- d) confirming that said plurality of seismic source signals patterns (p1, p2 . . . pn) do not substantially overlap such that they can be separated from each other, and if not changing one ore more seismic source signals patterns or a portion thereof and repeating step d;
- e) applying said patterns to a reservoir, and
- f) acquiring reflected and refracted seismic signal data at one or more receivers;
- and,
- g) processing said signal data to create a seismic survey.
A method of surveying a reservoir, comprising:
- a) providing one or more electric vibratory sources near a reservoir;
- b) each vibratory source providing a different acoustic signal pattern p (p1, p2 . . . pn), having a length t (t1, t2 . . . tn);
- c) each pattern (p1, p2 . . . pn) comprising a plurality of frequencies and a plurality of amplitudes having a rhythm, wherein said plurality of frequencies and plurality of amplitudes do not vary sequentially for more than 6 notes over length t;
- d) confirming by cross correlation that said plurality of patterns (p1, p2 . . . pn) do not substantially overlap such that they can be separated from each other, and if not, altering one or both of said patterns to maximize a separability of said patterns;
- e) applying said patterns to said reservoir;
- f) acquiring reflected and refracted signal data at one or more receivers;
- g) separating said signal data from each of said patterns to produce separated data;
- h) processing said separated data to produce processed data;
- i) displaying a graphical representation of said reservoir based on said processed data.
A plurality of seismic source songs for seismic surveying, said each seismic source song having a length and a series of notes having non-sequentially varying frequencies and a rhythm, wherein said plurality of frequencies does not vary sequentially over more than 6 notes, and wherein said plurality of seismic source songs are each unique and do not overlap for more than 4 notes in frequency or rhythm such that plurality of seismic source signals songs can be distinguished from each other.
Dependencies are inferred from the claim text.