Method for carrying out elastic vector wave imaging by using seabed multi-component seismic records

A seismic recording and vector wave technology, applied in seismology, seismic signal processing, measurement devices, etc., can solve the problem of reducing the quality of multi-shot superimposed imaging, and achieve the effect of saving calculation amount and strong practicability

Inactive Publication Date: 2020-11-17
HOHAI UNIV
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Problems solved by technology

However, the vector S-wave must be scalarized during scalar PS-wave imaging (Yan and Sava, 2008). PS-wave imaging will have polarity reversal problems at some incident angles, which will reduce the quality of multi-shot superposition imaging

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  • Method for carrying out elastic vector wave imaging by using seabed multi-component seismic records
  • Method for carrying out elastic vector wave imaging by using seabed multi-component seismic records
  • Method for carrying out elastic vector wave imaging by using seabed multi-component seismic records

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Before implementing elastic vector wave imaging of seabed multicomponent seismic data, preparatory work such as relocation, interpolation, denoising, suppression of ghost waves, and multiple waves is performed on seabed multicomponent seismic data in the conventional processing flow. At the same time, elastic geological modeling needs to be carried out by means of velocity analysis, tomography, and waveform inversion to obtain relatively accurate model elastic parameters.

[0035] Such as Figure 1-2 As shown, a method for elastic vector wave imaging using multi-component seismic records on the seabed includes the following steps:

[0036] 1) Input the seabed four-component seismic data into the data collector to preprocess the seismic data;

[0037]2) The input device inputs the simulated seismic source and the elastic parameters of the model,...

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Abstract

The invention discloses a method for carrying out elastic vector wave imaging by using seabed multi-component seismic records, which belongs to the technical field of seismic imaging. The method comprises the following steps of: 1) preprocessing acquired seabed multi-component seismic data, including repositioning, interpolation, denoising, ghost wave suppression, multiple waves and the like, so that the acquired seabed multi-component seismic data can be used for elastic wave imaging; 2) inputting an elastic parameter of a model, and simulating by using an acoustic-elastic coupling equation to obtain a forward vector P wave; 3) reversely transmitting seismic records by using a sound-elastic coupling equation to obtain a P wave and an S wave of a vector; and 4) obtaining a vector PP wave image and a PS wave image by using a vector cross-correlation imaging condition. According to the method, different seabed multi-component seismic data can be selectively utilized to carry out elasticwave imaging of a seabed complex structure, especially, seabed four-component seismic data can be simultaneously utilized to carry out tensor continuation of a receiving end, non-physical artifacts existing in conventional elastic wave imaging can be suppressed, and the imaging quality is improved.

Description

technical field [0001] The invention belongs to the technical field of seismic imaging, and in particular relates to a method for elastic vector wave imaging by using seabed multi-component seismic records. Background technique [0002] Seismic exploration is by artificially exciting seismic waves, and the wave field signals propagating underground arrive at surface geophones or sensors and are recorded. These wavefield records carry response information related to subsurface geological structure, rock elastic properties, and pore fluid properties. According to the propagation law of seismic waves in the formation rocks, using reasonable wave field propagation models and seismic data processing, inversion and interpretation methods, combined with the geological understanding of the research area to find geophysical detection methods for fossil energy such as oil and natural gas. [0003] Seismic exploration is now divided into offshore seismic exploration and land seismic e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/28G01V1/301G01V2210/74
Inventor 于鹏飞
Owner HOHAI UNIV
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