Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Reexamination Certificate
1999-04-26
2001-10-30
McElheny, Jr., Donald E. (Department: 2862)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
Reexamination Certificate
active
06311131
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a method of and an apparatus for determining the quality of seismic data during or after a seismic survey.
At present, the quality of a seismic survey is generally determined by use of instruments or engineering specifications located above a survey site, for example a fixed &mgr;bar limit for ambient noise or a prescribed gun drop-out limit. In some cases, failure to meet these criteria can lead to a survey being halted unnecessarily, resulting in increased cost through loss of production.
SUMMARY OF THE INVENTION
According to the present invention, there is provided a method of determining the quality of seismic data, comprising the steps of defining a predetermined threshold from a characteristic of a first set of seismic data and translating the difference between the predetermined threshold and the corresponding characteristic of a second set of seismic data into a measure of quality of the second set of seismic data.
Preferably, the first set of seismic data comprises a model used to define the predetermined threshold.
Preferably, the predetermined threshold is defined using existing seismic data.
Preferably, the first set of seismic data comprises a plurality of seismic traces and the predetermined threshold is modified on the basis of a succeeding set of seismic traces.
The characteristic may be the resolving power, the resolving factor, the signal-to-noise ratio, the effective bandwidth, the detectability, the upper frequency range, or the lower frequency range of the seismic data.
According to a second aspect of the present invention, there is provided an apparatus for determining the quality of seismic data, comprising a means for defining a predetermined threshold from a characteristic of a first set of seismic data, and a means for translating the difference between the predetermined threshold and the corresponding characteristic of a second set of seismic data into a measure of quality of the second set of seismic data.
REFERENCES:
patent: 4204279 (1980-05-01), Parrack et al.
patent: 4509150 (1985-04-01), Davis
patent: 4759636 (1988-07-01), Ahern et al.
Peardon Lloyd
Scott Ian Richard
Bouchard John H.
McElheny Jr. Donald E.
LandOfFree
Method of and apparatus for determining the quality of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of and apparatus for determining the quality of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and apparatus for determining the quality of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2585513