Application of Linear Time Difference Correction in Noise Attenuation
Received date: 2011-06-03
Revised date: 2012-03-12
Online published: 2012-04-10
When the xline and inline offset ratio in the 3-D seismic data is big,the linear waveform of reflection noise changes toward the hyperbola waveform with xline offset increase.When the source location is near the geophone line and the xline offset is small,the noise waveform accepted by the geophone line in the seismic record is linear; in contrast that the source location is far away the geophone line and the xline offset is large,the noise waveform in the seismic record is hyperbolic.The linear noise attenuation technology,such as FK filter,has no ability to attenuate hyperbolic shape noise.In this paper,we apply the linear time difference correction to eliminate the affections of the xline offset on the linear noise travel time,and to recovery the linear waveform which is affected by shot gather and big xline offset,then use the linear noise attenuation technology to attenuate the linear noise,and finally do the inverse linear time difference correction to recover normal offsets of the shot records.This technology has been successfully used to the wide-azimuth collected data.
Key words： Xline offset; Inline offset; Linear noise; Linear time difference; FK fileer.
TIAN Yan-Can, SU Qin, WANG Ji-Yuan, WANG Xi-Wen, QIE Shu-Hai . Application of Linear Time Difference Correction in Noise Attenuation[J]. Natural Gas Geoscience, 2012 , 23(2) : 353 -358 . DOI: 10.11764/j.issn.1672-1926.2012.02.353
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