Method for recording phase encode fore-superimpose depth shift by synthetic seismic source

A pre-stack depth migration and phase encoding technology, applied in seismic signal recording, seismic signal processing, etc., can solve problems such as low efficiency, lengthening synthetic source recording length, and reducing computational efficiency

Inactive Publication Date: 2004-02-04
张叔伦 +2
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Problems solved by technology

It has three main problems: 1) Both the synthetic source and the target illumination wave field use plane waves. When the underground structure is very steep, the length of the synthetic source record will be lengthened and the calculation efficiency will be reduced.
2) The wave field continuat

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  • Method for recording phase encode fore-superimpose depth shift by synthetic seismic source
  • Method for recording phase encode fore-superimpose depth shift by synthetic seismic source
  • Method for recording phase encode fore-superimpose depth shift by synthetic seismic source

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Embodiment

[0100] Applying the phase encoding synthetic source record pre-stack depth migration method proposed by the present invention, using the target illumination means, a corresponding computer program is compiled to carry out trial calculations on the Marmousi model and the Gulf of Mexico submarine cable longitudinal wave data, and the correctness of the method of the present invention is verified and effectiveness. 1. Trial calculation of Marmousi model

[0101] figure 1 a shows the prestack depth migration section of Marmousi model data obtained by prestack depth migration of synthetic source records with target illumination. A total of 30 ray parameters P with different angles are used, the ray parameter interval ΔP=12.5 μs / m (about 2.5 degrees), and the depth of the target illumination is 2200 meters. The value range of the ray parameter P is (-187.5μs / m, 175μs / m).

[0102] figure 1 b represents the migration profile obtained by using the frequency-dependent phase-encoded ...

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Abstract

In the present invention, the efficiency of surface artillery record deviation can be increased by several times over and the quality of image forming can be held high through spreading plane wave seismic origin of surface artillery and plane wave seismic origin wave field of underground lightening to be non-plane wave seismic origin and non-plane wave seismic orgin wave field of underground lightening, also applying phase coding technique and a new mixture phase coding technique onto the surface artillery record or synthetic seismic origin record of target lightening.

Description

technical field [0001] The present invention is a pre-stack depth migration method using synthetic seismic sources to record phase coding, which can be applied to the seismic data processing and computing centers of land and offshore oil and gas exploration companies or geophysical exploration bureaus, seismic data processing companies, exploration Institute of Geophysics, institute. (During onshore and offshore oil and gas exploration, it is necessary to collect artificial seismic data and process the seismic data in the seismic data computing center. Migration imaging is the central link in seismic data processing.) technical background [0002] The invention relates to a method for phase encoding pre-stack depth migration of synthetic seismic sources under complex structural conditions. [0003] Under complex structural conditions, the usual horizontal stacking method loses the precondition of CDP trace integration hyperbola, so it is imp...

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Application Information

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IPC IPC(8): G01V1/24G01V1/28
Inventor 张叔伦孙沛勇赵景霞
Owner 张叔伦
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