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Method for analyzing geologic body structure based on refracted waves and storage medium

A technology of refracted waves and geological bodies, used in seismology, geophysical measurement, seismic signal processing, etc., can solve the problems of inaccurate acquisition of seismic wavelets, inaccurate results of geological body structure analysis, etc., to avoid near-channel interference, improve The effect of reliability

Pending Publication Date: 2021-02-02
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the seismic wavelet cannot be accurately obtained, which leads to inaccurate analysis results of the geological body structure

Method used

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  • Method for analyzing geologic body structure based on refracted waves and storage medium
  • Method for analyzing geologic body structure based on refracted waves and storage medium
  • Method for analyzing geologic body structure based on refracted waves and storage medium

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Embodiment 1

[0057] In order to solve the above-mentioned technical problems existing in the prior art, an embodiment of the present invention provides a method for analyzing the structure of a geological body based on refracted waves.

[0058] refer to figure 2 , the method for analyzing geological body structure based on refracted waves in this embodiment includes the following steps:

[0059] S100, segmenting the geological volume profile of the target reservoir into multiple geological grids to form multiple geological grid points;

[0060] S200, setting the initial value of the underground propagation velocity of the seismic refracted wave at each geological grid point, and constructing the ray path of the seismic refracted wave from the source to each geological grid point, according to the distance of the seismic refracted wave from the seismic source to each geological grid point The difference between the actual first arrival travel time and the theoretical first arrival travel ...

Embodiment 2

[0068] In order to solve the above-mentioned technical problems existing in the prior art, the embodiment of the present invention also provides another specific implementation of the method for analyzing the structure of geological bodies based on refracted waves.

[0069] refer to image 3 , the method for analyzing geological body structure based on refracted waves in this embodiment includes the following steps:

[0070] S100, segmenting the geological volume profile of the target reservoir into multiple geological grids to form multiple geological grid points;

[0071] Here, the profile of the geological body can be drawn according to the target reservoir, which is the geological body to be analyzed. Geovolume profiles are parameterized by a uniform grid that is of constant size in all directions.

[0072] S200, setting the initial value of the underground propagation velocity of the seismic refracted wave at each geological grid point, and constructing the ray path of ...

Embodiment 3

[0126] In order to solve the above-mentioned technical problems in the prior art, Embodiment 3 of the present invention also provides a storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the above-mentioned method are implemented.

[0127] It should be noted that the method for executing the program stored on the storage medium is the same as the method for analyzing the structure of geological bodies based on refracted waves in Embodiment 1, so the method for executing the program stored on the storage medium in this embodiment is also here It will not be described in detail.

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Abstract

The invention discloses a method for analyzing a geologic body structure based on refracted waves and a storage medium, and the method comprises the steps: setting an initial value of the undergroundpropagation speed of seismic refracted waves at each geological grid point, and constructing a ray path of the seismic refracted waves from a seismic source to each geological grid point, correcting the initial value of the underground propagation speed according to the difference value between the actual first arrival travel time of the seismic refracted wave from the seismic source to each geological grid point and the theoretical first arrival travel time of the seismic refracted wave propagating along the ray path so as to obtain the correction value of the underground propagation speed ofthe seismic refracted wave at each geological grid point; and based on the geological quality factor inversion model, determining the geological quality factor of each geological grid point accordingto the correction value of the underground propagation speed and the geological absorption characteristic time of each ray path. The seismic refraction wavelet analyzed by the method is easy to distinguish from other waves so that the seismic refraction wavelet can be accurately extracted, the first arrival can be conveniently and reliably picked up, and the reliability of subsequent geologic body structure inversion is improved.

Description

technical field [0001] The invention belongs to the field of seismic data processing, and in particular relates to a method for analyzing geological body structure based on refraction waves and a storage medium internally storing the method for analyzing geological body structure based on refraction waves. Background technique [0002] At present, in geophysical prospecting, most seismic data are processed and interpreted using surface seismic reflection waves, cross-well transmission waves, VSP (Vertical Seismic Profiling, vertical seismic profile) up-going and down-going waves, etc. [0003] However, there are the following problems in processing and interpretation using surface seismic reflection waves, interwell transmission waves, VSP up-going and down-going waves, etc.: [0004] First, because the seismic information of shallow reflection is distributed in the short track and is seriously affected by the nearby surface waves, it is difficult to extract accurate seismic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 杨安琪王汝珍武永山
Owner CHINA PETROLEUM & CHEM CORP
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