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Method and device for processing data of submarine cable double-detection seismic exploration

A technology for seismic exploration and submarine cables, applied in seismic signal processing and other directions, can solve the problems of tediousness, randomness of precision, and difficulty in implementation, and achieve the effect of improving the accuracy of the search, simple and easy to obtain, and suppressing the ringing vibration.

Inactive Publication Date: 2009-11-11
王振华
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Problems solved by technology

However, the above-mentioned process of obtaining double-detection records for eliminating ringing vibrations through the trial-and-error method is quite cumbersome, not only difficult to implement, but also has considerable randomness in accuracy

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  • Method and device for processing data of submarine cable double-detection seismic exploration
  • Method and device for processing data of submarine cable double-detection seismic exploration
  • Method and device for processing data of submarine cable double-detection seismic exploration

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Embodiment Construction

[0057] Specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described here are for illustration only, and are not intended to limit the present invention.

[0058] First, please combine the attached Figure 4 An embodiment of the data processing method for submarine cable dual-detection seismic exploration of the present invention is described as follows:

[0059] S1. Calculating the first mixed-wave record and the second mixed-wave record, wherein the first mixed-wave record is the sum of the hydrophone field and the geophone field obtained by exploration, and the second mixed-wave record is the hydrophone field and the geophone field field difference;

[0060] Preferably, in order to facilitate the processing of seismic data, a step S0 is also included before step S1: performing amplitude normalization processing on the hydrophone and geophone fields obtained from exploration, that is, first multiplying th...

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Abstract

The invention discloses a method and a device for processing data of submarine cable double-detection seismic exploration. The method implements the following steps for seismic data obtained by submarine cable double-detection seismic exploration: calculating a first mixing record and a second mixing record; obtaining the double-pass travel time of earthquake waves in seawater by calculating a crosscorrelation function of the second mixing record to the first mixing record according to the time of the maximum value; obtaining a subbottom reflection factor by calculating a ratio between a sub extremum value and the maximum value of a self correlation function recorded by the first mixing record; and utilizing the subbottom reflection factor to suppress singing interference in the seismic data. By adopting the method and the device, the calculating precision of the subbottom reflection factor is improved, the singing in the submarine cable double-detection seismic exploration is effectively suppressed, and a calculating model of the subbottom reflection factor is built, thereby the rapid and simple calculation of the subbottom reflection factor is achieved.

Description

technical field [0001] The invention relates to the technical field of marine seismic exploration, in particular to a data processing method and a data processing device for submarine cable dual-detection seismic exploration. Background technique [0002] Using the difference in elasticity and density of the underground medium, the nature and shape of the underground rock formation can be deduced by observing and analyzing the artificially excited seismic wave signals. This technology is called seismic exploration (including land seismic exploration and marine seismic exploration), and is It is an important means of surveying oil and natural gas resources before drilling, and it has also been widely used in geological exploration and crustal research. [0003] Compared with land seismic exploration, the seismic data collected by marine seismic exploration will be interfered by multiple waves that propagate up and down in the seawater—singing earthquake. For the principle, se...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
Inventor 王振华
Owner 王振华
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