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Seismic full-waveform inversion method and device

A technology of full waveform inversion and seismic wave field, applied in seismology, measurement device, seismic signal processing, etc., can solve problems such as low accuracy, avoid accuracy loss, improve calculation efficiency and accuracy, and reduce data volume.

Active Publication Date: 2021-06-08
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a seismic full waveform inversion method and device, to alleviate the existing full waveform inversion method in the face of complex geological conditions and surface undulations caused by the lack of seismic wave forward modeling technology. Technical issues with precision

Method used

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  • Seismic full-waveform inversion method and device

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Embodiment 1

[0039] According to an embodiment of the present invention, an embodiment of a seismic full waveform inversion method is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0040] figure 1 A flow chart of a seismic full waveform inversion method provided by an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0041] Step S101, acquiring single-shot seismic data, and generating an initial physical parameter model based on the single-shot seismic data. The single shot seismic data is the actual seismic data, which can be the seismic data in the reservoir or the seismic data in other formations. The embodiment of t...

Embodiment 2

[0081] The embodiment of the present invention provides a seismic full waveform inversion device, which is mainly used to implement the seismic full waveform inversion method provided in the above content of Embodiment 1. The following describes the seismic full waveform inversion method provided by the embodiment of the present invention The waveform inversion device will be introduced in detail.

[0082] Figure 5 It is a structural schematic diagram of a seismic full waveform inversion device provided by an embodiment of the present invention. Such as Figure 5 As shown, the seismic full waveform inversion device mainly includes: an acquisition generating unit 11 and an updating unit 12, wherein:

[0083] An acquisition generation unit 11, configured to acquire single-shot seismic data, and generate an initial physical parameter model based on the single-shot seismic data;

[0084] The update unit 12 is configured to update the initial physical parameter model according ...

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Abstract

The invention provides a seismic full-waveform inversion method and device, and relates to the technical field of seismic exploration, and the method comprises the steps: obtaining single-shot seismic data, and generating an initial physical property parameter model based on the single-shot seismic data; updating the initial physical property parameter model according to the single-shot seismic data and a forward modeling process based on a preset forward modeling neural network to obtain a target physical property parameter model, wherein the preset forward simulation neural network is a neural network based on physical constraints. According to the method, the propagation law of seismic waves can be simulated through participation of physical constraints, the preset forward modeling neural network becomes a neural network suitable for complex media and earth surface conditions, and the preset forward modeling neural network can avoid precision loss caused by grid rule subdivision under the complex media and earth surface conditions. The forward modeling process in the seismic full-waveform inversion process is completed through the preset forward modeling simulation neural network, and the calculation efficiency and precision of seismic full-waveform inversion can be improved.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a seismic full waveform inversion method and device. Background technique [0002] With the development of seismic exploration, the geological conditions are becoming more and more complex, and the requirements for exploration accuracy are getting higher and higher, and full waveform inversion is considered to be a high-precision reservoir parameter inversion method at present. Seismic wave forward modeling technology is the most important part of Full Waveform Inversion (FWI), and it is also the most expensive calculation module. Therefore, the calculation accuracy of seismic forward modeling technology is regarded as one of the keys to improve the effectiveness of full waveform inversion one. At present, the numerical simulation methods commonly used in forward modeling technology include finite difference and finite element. When these methods face complex geologi...

Claims

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Application Information

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IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/30G01V1/307
Inventor 郭银玲李冬彭苏萍杜文凤
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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