Seismic trace string induction identification quantification method and device

Abstract

The invention discloses a seismic trace string induction identification quantification method and device. The method comprises the following steps of dividing seismic traces into at least one identification group, for each identification group, counting the number of seismic data which are positive at the same time or the number of seismic data which are negative at the same time on all seismic traces at each sample point position, determining a sample point characteristic value of each sample point position according to the number of the seismic data which are positive or the number of the seismic data which are negative and the total number of the seismic traces in the identification group, determining characteristic values of the identification group according to the sample point characteristic values and the total number of the sample point positions, and when the characteristic value of the identification group is greater than a set threshold, determining that the string inductionexists in the identification group, and determining the characteristic value of the identification group as the relative intensity of the string induction. The intensity of the string induction can be accurately identified and quantified.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration, in particular to a seismic trace series induction identification and quantification method and device. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] Seismic trace string induction is a kind of interference signal often encountered in the process of field seismic data acquisition. Since this kind of infection signal generally always appears on a group (or all) of the continuous seismic traces at the same time, and the waveform is similar to the pulse transmission group, it is vividly called "serial induction", such as figure 1 with figure 2 shown. in, figure 1 For correlation pre-earthquake records, several horizontal "black lines" are string induction, figure 2 It is a cha...

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Problems solved by technology

For example, in the area near the shot point, the energy of the seismic signal is relatively strong, and the series induction in this area must be strong enough to affect the seismic signal, while the opposite is true at the far shot point. When the intensity of the series induction on the seismic record reaches When it is enough to affect the quality of the data, the shot needs to be regarded as useless or supplemented. This quality control process is generally achieved by looking at the seismic records, but the number of traces currently collected is generally tens of thousands. By checking Seismic records are very inefficient in accurately judging the degree of influence of series induction, and misjudgments and missed judgments are likely to occur in actual operations. Therefore, it is necessary to find an accurate method and device for identifying and quantifying the intensity of series induction

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