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Seismic data inversion non-stretching dynamic correction method and device, electronic equipment and medium

A technology of seismic data and electronic equipment, applied in the field of geophysical exploration and processing, can solve the problems of mutual influence, difficulty in selecting suitable time windows and time factors, unfavorable industrial applications, etc., to avoid stretching distortion and shallow coverage times. reduced effect

Pending Publication Date: 2022-03-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The intercept and gradient are corrected based on the analysis of the effect of dynamic correction stretching on properties, but this method has certain limitations
Applying parabolic Radon transformation in the superposition process eliminates dynamic correction stretching phenomenon, but it is necessary to find a suitable path in the Radon domain, which is not conducive to industrial applications
The stretchless motion correction method needs to find out the first arrival time of each event, and it is difficult to select an appropriate time window and time factor
Spectrum substitution without stretching motion correction method can theoretically eliminate time difference, but in practice, different events will affect each other after phase substitution
In the method of multiple iterations, partial dynamic correction is performed in each iteration and deconvolution is used to correct the influence of stretching and reduce stretching distortion. However, the conventional dynamic correction method is used in each iteration, and the result of dynamic correction is still will introduce stretch distortion
These methods cannot fundamentally eliminate the influence of dynamic correction on wavelet stretching, and are difficult to apply in actual processing, and the stability is not good

Method used

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  • Seismic data inversion non-stretching dynamic correction method and device, electronic equipment and medium
  • Seismic data inversion non-stretching dynamic correction method and device, electronic equipment and medium
  • Seismic data inversion non-stretching dynamic correction method and device, electronic equipment and medium

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Experimental program
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Effect test

Embodiment 1

[0168] figure 1 A flowchart showing the steps of the seismic data inversion stretch-free motion correction method according to the present invention.

[0169] like figure 1 As shown, the method for seismic data inversion without stretching motion correction includes: Step 101, refer to Dow Bayesian inversion to locate the reflection coefficient position; Step 102, take the reflection coefficient position as a constraint, determine the objective function of the sparse reflection coefficient inversion ; Step 103, solve the objective function of sparse reflection coefficient inversion by least squares method, and calculate the reflection coefficient after motion correction; Step 104, calculate the seismic data after motion correction through the reflection coefficient after motion correction.

[0170] figure 2 A schematic diagram of single-shot seismic data without event crossings is shown, according to one embodiment of the invention.

[0171] image 3 shows the basis fig...

Embodiment 2

[0179] Figure 10 A block diagram of a non-stretch motion correction device for seismic data inversion according to an embodiment of the present invention is shown.

[0180] like Figure 10 As shown, the seismic data inversion has no stretching motion correction device, including:

[0181] The positioning module 201 locates the position of the reflection coefficient with reference to Bayesian inversion;

[0182] The objective function determining module 202 is used to determine the objective function of the sparse reflection coefficient inversion with the position of the reflection coefficient as a constraint;

[0183] The reflection coefficient calculation module 203 solves the objective function of the sparse reflection coefficient inversion by the least square method, and calculates the reflection coefficient after motion correction;

[0184] The motion correction module 204 calculates the motion-corrected seismic data through the motion-corrected reflection coefficient....

Embodiment 3

[0205] The present disclosure provides an electronic device comprising: a memory storing executable instructions; and a processor running the executable instructions in the memory to implement the above method for seismic data inversion without stretching.

[0206] An electronic device according to an embodiment of the present disclosure includes a memory and a processor.

[0207] The memory is used to store non-transitory computer readable instructions. Specifically, the memory may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache). The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, and the like.

[0208] The processor may be a central processing unit (CPU) or other form of processing unit having data proces...

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Abstract

The invention discloses a seismic data inversion non-stretching dynamic correction method and device, electronic equipment and a medium. The method comprises the following steps: positioning the position of a reflection coefficient by reference channel Bayesian inversion; determining an objective function of sparse reflection coefficient inversion by taking the position of the reflection coefficient as a constraint; solving by a least square method aiming at an objective function of sparse reflection coefficient inversion, and calculating a reflection coefficient after dynamic correction; and calculating seismic data after dynamic correction through the reflection coefficient after dynamic correction. According to the method, a dynamic correction result without stretching distortion is obtained, and the purposes of improving the data quality of the angle gather and facilitating subsequent processing and interpretation work are achieved.

Description

technical field [0001] The invention relates to the field of geophysical exploration and processing of oil and natural gas energy, and more specifically, to a seismic data inversion non-stretching correction method, device, electronic equipment and medium. Background technique [0002] In seismic data processing, the purpose of dynamic correction is to eliminate the influence of shot spacing on the travel time of reflected waves, to straighten the trajectory of time-distance curves of reflected waves at common depth points, to enhance the ability to suppress interference by using stacking technology, and to reduce the impact caused by the stacking process. The reflected wave event is distorted. Conventional digital dynamic correction has the phenomenon of waveform stretching at far offset distances, and its main frequency decreases, which affects high-resolution superposition and high-precision AVO analysis. reduce. Dynamically correcting wavelet stretching will shift the ...

Claims

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Application Information

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IPC IPC(8): G01V1/36
CPCG01V1/36G01V2210/52
Inventor 王瑞刘韬陈冬
Owner CHINA PETROLEUM & CHEM CORP
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