Title:
SYSTEM AND METHOD FOR COMPENSATING TIME AND OFFSET VARYING NEAR-SURFACE EFFECTS IN SEISMIC DATA BACKGROUND
Document Type and Number:
WIPO Patent Application WO/2011/139426
Kind Code:
A3
Abstract:
A system for and computer implemented method for transforming seismic trace information includes obtaining seismic trace information for each trace, the seismic trace information including shot to receiver offset and the vertical velocity of at least one subsurface primary reflector and including respective information resulting from near-surface layering and velocity effects and relating to the primary reflector, reversibly transforming seismic trace information from each non-zero offset trace such that the respective information resulting from the near-surface effects at each non-zero offset position is moved in a time dimension such that they become effectively periodic with respect to respective primary reflector information and in accordance with a periodicity for a zero offset trace at the same surface location, filtering the transformed seismic trace information to remove at least a portion of the information resulting from near-surface effects, and inverting the reversible transforming.
Inventors:
ALFORD RICHARD B (US)
HERKENHOFF FREDERIC E (US)
HERKENHOFF FREDERIC E (US)
Application Number:
PCT/US2011/030031
Publication Date:
March 15, 2012
Filing Date:
March 25, 2011
Export Citation:
Assignee:
CHEVRON USA INC (US)
ALFORD RICHARD B (US)
HERKENHOFF FREDERIC E (US)
ALFORD RICHARD B (US)
HERKENHOFF FREDERIC E (US)
International Classes:
G01V1/28; G01V1/30; G01V1/36; G06F19/00
Foreign References:
| US5253217A | 1993-10-12 | |||
| US6424920B1 | 2002-07-23 | |||
| US6353577B1 | 2002-03-05 | |||
| US6967898B2 | 2005-11-22 |
Attorney, Agent or Firm:
HANZE, Carlos L. et al. (Law DepartmentPost Office Box 600, San Ramon California, US)
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