Constrained eigenvectors: A means to separate aliased arrivals

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:542988

Mars, J I; Rector, III, J W ^[1]

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1. Univ. of California, Berkeley, CA (United States)

Multichannel filtering for wavefield separation have been used in seismic processing for decades and have become an essential component in VSP and crosswell reflection imaging. The need for good multichannel wavefield separation filters is acute in borehole seismic imaging techniques such as VSP and crosswell reflection imaging techniques such as VSP and crosswell reflection imaging, where strong interfering arrivals can temporally overlap with desired arrivals. For example, tube waves can be very strong in VSP and crosswell data. Tube waves can have similar frequency content to desired reflections making them difficult to temporally attenuate. Shear waves and conversions can also be an interference problem in many wide-angle imaging applications. In conventional surface seismic data, multichannel filtering prior to stacking is often less critical because there is often a time window where reflections and multiples can be isolated. In many land surveys, ground roll can be removed by low-cut filtering in the time domain.

• OSTI ID: 542988
• Report Number(s): CONF-951013--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
58 GEOSCIENCES
DATA ANALYSIS
DATA COMPILATION
EIGENVECTORS
EXPLORATION
PETROLEUM DEPOSITS
SEISMIC SURVEYS