Static marine seismic system and method

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting

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367 15, 367367, 367 16, 367 56, 367 57, 367 58, 367 24, 367 59, 367 23, 181111, 181115, G01V 138

Patent

active

060916680

ABSTRACT:
A system and method for periodically providing information about subsurface formations in a marine environment using a non-towed seismic signal source (3) and a static array of seismic signal receivers (4) is disclosed. The seismic signal source (3) comprises a support frame (10) and a line (7) attaching the support frame to a stationary platform (2), wherein the line (7) restrains the support frame (10) in a position that is static in relation to the formation (8). The seismic signal source (3) includes eight air guns (12) attached to the support frame (10) such that the air guns (12) are discharged to provide a tapered, heavy centered, point source seismic signal at a specific location relative to the formation (8) that is reflected to the static array of seismic signal receivers (4) such that changes in the formation characteristics may be observed over time.

REFERENCES:
patent: 4686660 (1987-08-01), Glestrum et al.
patent: 4715023 (1987-12-01), Oto
patent: 4716553 (1987-12-01), Dragsund et al.
patent: 4721180 (1988-01-01), Haughland
patent: 4956822 (1990-09-01), Barber et al.
patent: 5469404 (1995-11-01), Barber et al.

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