Design method of independent scanning signal based on median filter processing requirements

A filter processing and design method technology, which is applied in the field of oil and gas geophysical exploration, can solve problems such as shortage, achieve the effect of reducing impact and improving collection efficiency

Active Publication Date: 2021-11-05
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

At present, there is a lack of technology in this area

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  • Design method of independent scanning signal based on median filter processing requirements
  • Design method of independent scanning signal based on median filter processing requirements

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Embodiment Construction

[0020] The details of the present invention can be understood more clearly with reference to the accompanying drawings and the description of specific embodiments of the present invention. However, the specific embodiments of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible deformation based on the present invention, which should be considered as belonging to the scope of the present invention, and the present invention will be further described below in conjunction with the accompanying drawings.

[0021] For realizing above-mentioned purpose of the present invention, design method of the present invention can be realized by following technical measures:

[0022] Step 1. Establish a two-dimensional geological model according to the geological structure of the region...

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Abstract

The present invention proposes a method for designing an independent scanning signal based on median filter processing requirements, wherein the design method includes the following steps: S101: Establish a two-dimensional geological model in the area where the independent scanning of the vibrator is implemented, and simultaneously stimulate the change Obtaining multiple aliasing wave fields from the jamming shot with a scanning length and the effective shot with a fixed scanning length; S102: using a fixed scanning signal to correlate with the obtained multiple aliasing wave fields to obtain multiple aliasing single shots; S103: Extracting the multiple aliased single shots into common receiver gathers; S104: using median filtering to suppress noise on the common receiver gathers; S105: selecting a reasonable independent scan according to the noise suppression effect Signal. The design method of the invention can improve the collection efficiency and at the same time reduce the influence of the aliasing wave field on the imaging of the target layer.

Description

technical field [0001] The invention relates to the field of oil and gas geophysical exploration, in particular to a method for independently scanning signals based on median filter processing requirements. Background technique [0002] Vibrator technology is an important technology for seismic exploration and acquisition in western China at present, and it is widely used. The core and difficulty of independent scanning technology is how to separate the wave field. Scan the signal to facilitate later wavefield separation. However, the technology in this area is still lacking at this stage. Contents of the invention [0003] In order to solve the defects of the prior art, the purpose of the present invention is to conduct research on the above problems, using different scan length signals to simulate the aliasing wave field, and adopting the median filtering method after obtaining the aliasing wave field with different influence sizes. Carrying out suppression analysis, t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
CPCG01V1/301G01V2210/324
Inventor 吴婷
Owner CHINA PETROLEUM & CHEM CORP
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