Surface wave compacting method for wide orientation seismic data

A technology of seismic data and wide azimuth, applied in seismic signal processing, seismology for logging records, etc., can solve the problem that effective waves are difficult to completely separate, achieve the effect of ensuring no loss and improving signal-to-noise ratio

Active Publication Date: 2018-01-09
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, due to the limitations of the principle of this method, it is still difficult to completely separate the surface waves and effective waves that overlap in the time-frequency domain.

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  • Surface wave compacting method for wide orientation seismic data
  • Surface wave compacting method for wide orientation seismic data
  • Surface wave compacting method for wide orientation seismic data

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Embodiment Construction

[0013] Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0014] The invention discloses a surface wave suppression method for wide-azimuth seismic data. The method includes:

[0015] In step 101, surface wave analysis, simulation and inversion (also known as SWAMI) is used to suppress surface waves on the seismic data in the detection point domain;

[0016] Step 102, in the cross domain, perform surface wave suppression on the result of step 101 in the three-dimensional frequency-space domain (also called FKK);

[...

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Abstract

The present application discloses a surface wave suppression method for wide-azimuth seismic data. The method includes: step 101, in the detection point domain, adopt surface wave analysis, simulation and inversion to carry out surface wave suppression on seismic data; Surface wave suppression; step 103, in the shot domain, perform surface wave suppression on the result of step 102 by non-uniform coherent noise suppression, so as to suppress the remaining weak energy part of the surface wave, and obtain the processed seismic data. The application of the invention can well suppress the surface wave interference of wide-azimuth seismic data, improve the signal-to-noise ratio of the data, and at the same time ensure that low-frequency effective signals are basically not lost, laying a good foundation for subsequent processing and reservoir inversion.

Description

technical field [0001] The invention relates to the field of seismic data processing, in particular to a surface wave suppression method for wide-azimuth seismic data. Background technique [0002] With the increasingly refined development of exploration and development, the focus of oil and gas exploration has gradually shifted to small-scale structural oil and gas reservoirs, stratigraphic oil and gas reservoirs, and lithologic oil and gas reservoirs. The narrow azimuth exploration can no longer meet the needs of exploration, and the application of high-density and wide-azimuth 3D seismic exploration has become the mainstream and direction of recent seismic exploration technology development. Chen Guowen (2014, Application of wide-azimuth seismic data in fractured reservoir prediction, Journal of Petroleum and Natural Gas), Liu Yimou (2012, New progress in wide-azimuth seismic exploration technology, Petroleum Geophysical Exploration) and others discussed the impact of wid...

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Application Information

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IPC IPC(8): G01V1/28G01V1/40
Inventor 刘洪雷张改兰陈世军
Owner CHINA PETROLEUM & CHEM CORP
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