The contribution of digital filtering to the enhance- ment of seismic reflection data

- Elsevier Publishing

Geoexploration

Company, Amsterdam

- Printed in The Netherlands

Abstracts Session 4: Seismic Data and Instrumentation THE

CONTRIBUTION

MENT

OF SEISMIC

OF DIGITAL REFLECTION

FILTERING

TO THE

ENHANCE-

DATA

J. N. BRAGG Geophysical

Service International,

(Received September

Sydney,

N.S. W. (Australia)

14, 1970)

During the past decade the digital revolution has given the geophysicist a greater flexibility in the choice of processing techniques than at any other time in the past. Before the digital revolution filtering and processing were provided by analog devices which had little flexibility and many disadvantages relative to the processing techniques available today. The development of digital techniques in the past has been oriented toward the enhancement of final seismic sections through the application of various filtering techniques, where future developments will be oriented toward the extraction of velocity and other information from the basic seismic field data. The two most used types of digital filters at present are Deconvolution, and Zero Phase Band Pass filtering with other special purpose filters such as multi-channel filters being used for specific geophysical problems. This paper reviews, with examples, the types of digital filters developed over the past several years.

THE INFORMATION PROCESSING

EXTRACTION

APPROACH

TO SEISMIC

DATA

J. E. SUNDQUIST Geophysical

Service

(Received September

International,

Sydney,

N.S. W. (Australia)

14, 1970)

Conventional seismic data processing has generally followed a data enhancement approach, applying various filtering, stacking, and display techniques to improve the quality of desired events and attenuate others. Now the development and availability of high-speed digital computers with large bulk storage capacity, makes possible a new approach-information extraction. This approach involves searching out, detecting, and tracking the various continuous events on the seismic section, whether primaries, multiples, diffraction, or false alarms and filing information on these events in terms of time, amplitude, and velocity in the computer. Geoexploration,

8 (1970) 243-251