CN-122017999-A - Offset noise suppression method and device, electronic equipment and storage medium

Abstract

According to the offset noise suppression method, the device, the electronic equipment and the storage medium, the offset noise-containing reflected wave offset profile is decomposed by using the orthogonal polynomial decomposition method to obtain the sub-profiles with different orders, under normal conditions, the reflected wave phase axis has better energy consistency in the space direction, the offset noise has quicker energy change, so that in the orthogonal polynomial decomposition process, the reflected wave phase axis energy is decomposed into the sub-profile with the lower order, the offset noise is more decomposed into the sub-profile with the higher order, and the offset noise can be effectively suppressed by giving a smaller weighting coefficient to the higher order profile, so that the reflected wave offset profile with higher signal to noise ratio is obtained, and the imaging precision of the reflected wave is further improved.

Inventors

• ZHOU YANXIN
• JIANG DAJIAN
• WANG HONGQI
• LIU ZHIYUAN
• NING YAXIN

Assignees

• 中国石油化工股份有限公司
• 中国石油化工股份有限公司石油勘探开发研究院

Dates

Publication Date

20260512

Application Date

20241112

Claims (11)

1. 1. An offset noise suppression method based on orthogonal polynomial decomposition, comprising: Performing orthogonal polynomial decomposition on the offset profile containing offset noise to obtain a plurality of sub-profiles with different orders; Determining a weighting coefficient for each of a plurality of different orders of said sub-profiles; And carrying out weighted addition on all the sub-sections according to the weighting coefficient of each sub-section to obtain an offset section after suppressing offset noise.
2. 2. The method of claim 1, wherein said orthogonal polynomial decomposition of the offset profile containing the offset noise results in a plurality of sub-profiles of different orders, comprising: Determining a time window range in which offset noise exists on an offset section containing the offset noise, wherein the time window range comprises a time range and a space range; and carrying out orthogonal polynomial decomposition on the offset profile within the time window range to obtain a plurality of sub-profiles with different orders.
3. 3. The method of claim 1, wherein said determining a weighting factor for each of a plurality of different orders of said sub-profiles comprises: and determining the weighting coefficient of each sub-section in the plurality of sub-sections with different orders according to the energy intensity of the reflection wave in-phase axis and offset noise on the plurality of sub-sections with different orders.
4. 4. A method according to claim 3, wherein the weighting coefficients of the sub-profiles of the higher order are smaller than the weighting coefficients of the sub-profiles of the lower order.
5. 5. An offset noise suppression apparatus based on orthogonal polynomial decomposition, comprising: The decomposition module is used for carrying out orthogonal polynomial decomposition on the offset profile containing offset noise to obtain a plurality of sub-profiles with different orders; A weighting coefficient determining module, configured to determine a weighting coefficient of each of the sub-sections of a plurality of different orders; And the weighting module is used for carrying out weighted addition on all the sub-sections according to the weighting coefficient of each sub-section to obtain an offset section after suppressing offset noise.
6. 6. The apparatus according to claim 1, wherein the decomposition module is specifically configured to: Determining a time window range in which offset noise exists on an offset section containing the offset noise, wherein the time window range comprises a time range and a space range; and carrying out orthogonal polynomial decomposition on the offset profile within the time window range to obtain a plurality of sub-profiles with different orders.
7. 7. The apparatus according to claim 1, wherein the weighting coefficient determining module is specifically configured to: and determining the weighting coefficient of each sub-section in the plurality of sub-sections with different orders according to the energy intensity of the reflection wave in-phase axis and offset noise on the plurality of sub-sections with different orders.
8. 8. A device according to claim 3, wherein the weighting coefficients of the sub-profiles of the higher order are smaller than the weighting coefficients of the sub-profiles of the lower order.
9. 9. An electronic device, comprising: A processor; a memory; And a computer program, wherein the computer program is stored in the memory, which computer program, when executed by the processor, implements the method of any of claims 1-4.
10. 10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the method of any of claims 1-4.
11. 11. A computer program product, characterized in that the computer program product comprises a computer program which, when executed by a processor, implements the method of any of claims 1-4.

Description

Offset noise suppression method and device, electronic equipment and storage medium Technical Field The application relates to the technical field of seismic data processing, in particular to a method and a device for suppressing offset noise, electronic equipment and a storage medium. Background When the speed of an underground medium is complex and the structure is severe, particularly at a steep stratum pinch-out position, the characteristic of a reflected wave is abnormal and complex, a great amount of diffraction is generated in the seismic wave propagation process, the existing seismic data processing technology generally processes the reflected wave, a great amount of diffracted wave signals play a role of noise in the processing process, particularly in the imaging process, as diffracted waves do not meet the kinematic characteristic of the reflected wave, the diffracted wave energy cannot be well restored in the imaging process based on the reflected wave imaging, the phenomenon appears in the form of noise on the imaging section, and offset noise exists at the stratum pinch-out position and the fault break point position, and when the offset noise energy is strong, the imaging precision of the reflected wave is affected, and further the position interpretation and break point identification are affected. It should be noted that the information disclosed in the background section of the present application is only for enhancement of understanding of the general background of the present application and should not be taken as an admission or any form of suggestion that this information forms the prior art that is well known to a person skilled in the art. Disclosure of Invention In view of this, the present application provides a method, apparatus, electronic device and storage medium for suppressing offset noise, so as to solve the problem in the prior art that when the offset noise energy is strong, the imaging precision of the reflected wave is affected, and further the horizon interpretation and breakpoint recognition are affected. In a first aspect, an embodiment of the present application provides an offset noise suppression method based on orthogonal polynomial decomposition, including: Performing orthogonal polynomial decomposition on the offset profile containing offset noise to obtain a plurality of sub-profiles with different orders; Determining a weighting coefficient for each of a plurality of different orders of said sub-profiles; And carrying out weighted addition on all the sub-sections according to the weighting coefficient of each sub-section to obtain an offset section after suppressing offset noise. In one possible implementation manner, the performing orthogonal polynomial decomposition on the offset profile containing offset noise to obtain a plurality of sub-profiles with different orders includes: Determining a time window range in which offset noise exists on an offset section containing the offset noise, wherein the time window range comprises a time range and a space range; and carrying out orthogonal polynomial decomposition on the offset profile within the time window range to obtain a plurality of sub-profiles with different orders. In one possible implementation, the determining the weighting coefficient of each of the sub-sections of the plurality of different orders includes: and determining the weighting coefficient of each sub-section in the plurality of sub-sections with different orders according to the energy intensity of the reflection wave in-phase axis and offset noise on the plurality of sub-sections with different orders. In one possible implementation, the weighting coefficients of the sub-profiles of the higher order are smaller than the weighting coefficients of the sub-profiles of the lower order. In a second aspect, an embodiment of the present application provides an offset noise suppression apparatus based on orthogonal polynomial decomposition, including: The decomposition module is used for carrying out orthogonal polynomial decomposition on the offset profile containing offset noise to obtain a plurality of sub-profiles with different orders; A weighting coefficient determining module, configured to determine a weighting coefficient of each of the sub-sections of a plurality of different orders; And the weighting module is used for carrying out weighted addition on all the sub-sections according to the weighting coefficient of each sub-section to obtain an offset section after suppressing offset noise. In one possible implementation manner, the decomposition module is specifically configured to: Determining a time window range in which offset noise exists on an offset section containing the offset noise, wherein the time window range comprises a time range and a space range; and carrying out orthogonal polynomial decomposition on the offset profile within the time window range to obtain a plurality of sub-profiles with different orders. In one pos