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Combined type ocean bottom seismograph attitude automatic correction device and method

An automatic calibration and seismograph technology, applied in seismology, measuring devices, seismic signal recording, etc., can solve problems such as automatic data processing cannot be realized, and achieve the effect of improving data processing efficiency

Active Publication Date: 2020-06-09
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In the existing technology, there are very few methods for attitude correction of combined submarine seismographs, and automatic data processing cannot be realized, and manual intervention is required to pick up the arrival time of direct waves to carry out polarization analysis

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  • Combined type ocean bottom seismograph attitude automatic correction device and method
  • Combined type ocean bottom seismograph attitude automatic correction device and method
  • Combined type ocean bottom seismograph attitude automatic correction device and method

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Embodiment Construction

[0044] The specific embodiment of the present invention is described below in conjunction with accompanying drawing:

[0045]This embodiment provides a method for automatically correcting the posture of a three-component seismometer of a combined seabed seismometer. Attitude correction refers to correcting the original attitude seismic gathers of the instrument to the seismic gathers of the marine 3D seismic observation coordinate system. Taking the active source seismic gather recorded at the original attitude as input data, the three-component data is calibrated to the horizontal attitude by using the pitch angle and roll angle recorded by the electronic compass inside the instrument. Then rotate the X component to the direction of the longitudinal survey line (inline), and first obtain the rotation azimuth. The calculation of azimuth angle includes: based on the AIC (Akaike Information Criterion) method, respectively calculate the arrival time of the two horizontal compone...

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Abstract

The invention discloses a combined type ocean bottom seismograph attitude automatic correction device and method, and belongs to the technical field of ocean seismic exploration. The method comprisesthe steps of taking an active source seismic trace gather recorded by an original attitude as input data, calibrating three-component data to a horizontal attitude by utilizing a pitch angle and a roll angle recorded by an electronic compass assembled in an instrument; then rotating an X component to the direction of a longitudinal measuring line, and calculating a rotation azimuth angle; and solving a final rotation azimuth angle based on a cross-correlation result of a first horizontal component and a vertical component after the initial azimuth angle is rotated. The invention also providesa device for realizing the method. According to the invention, the attitude automatic correction of three-component seismometer trace gather data of a combined type ocean bottom seismograph can be realized, and the data preprocessing rate of the combined type ocean bottom seismograph in ocean energy and resource active source seismic exploration is greatly improved.

Description

technical field [0001] The invention relates to the technical field of marine seismic exploration, in particular to a device and method for automatically correcting the attitude of a three-component seismometer of a combined seabed seismometer. Background technique [0002] Marine seismic exploration is one of the main means of exploration and development of offshore oil and gas resources. The new marine seismic acquisition technology represented by airgun sources and combined seabed seismometers has the advantages of low cost, high efficiency, dense construction sites, large operating range, four-component data acquisition, and omnidirectional imaging, so it has been widely used. Seabed resource exploration has played a significant role. After just a few years of instrument research and development, sea trial testing, and market cultivation and promotion, the new acquisition concept and method of the combined submarine seismometer has become the mainstream of marine seismi...

Claims

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Application Information

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IPC IPC(8): G01V1/38G01V1/24G01V1/36
CPCG01V1/242G01V1/362G01V1/3835
Inventor 王元游庆瑜郝天珧胡耀星赵春蕾张妍徐锡强
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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