CN-121978753-A - Method and device for improving quality of transverse wave data, storage medium and electronic equipment

CN121978753ACN 121978753 ACN121978753 ACN 121978753ACN-121978753-A

Abstract

The invention belongs to the technical field of geophysical exploration, and particularly relates to a method and a device for improving the quality of transverse wave data, a storage medium and electronic equipment, wherein the transverse wave data are wave field data used for representing a subsurface geological structure; the method comprises the steps of obtaining reverse seismic source data related to original seismic data according to the original seismic data, constructing a virtual seismic source according to the reverse seismic source data, obtaining data processed through virtual seismic source interference according to the original seismic data and the virtual seismic source, and generating transverse wave data with improved quality according to a plurality of data processed through the virtual seismic source interference. The invention adopts a reverse seismic source signal interference mechanism to construct a reverse seismic source signal, and uses the reverse seismic source signal as a virtual seismic source to carry out interference processing with original seismic data, so that the quality of target transverse wave data can be effectively enhanced.

Inventors

CAO HONG
BAI XUMING
WU LONG
WANG JINGFU
WU DI
ZHANG CHUN

Assignees

中国石油集团东方地球物理勘探有限责任公司
中国石油天然气集团有限公司

Dates

Publication Date: 20260505
Application Date: 20251222

Claims (10)

1. A method of improving the quality of shear wave data, wherein the shear wave data is wavefield data used to characterize a subsurface geologic structure, the method comprising: Acquiring original seismic data generated by each seismic source in a plurality of seismic sources for generating seismic waves; Acquiring reverse seismic source data related to the original seismic data according to the original seismic data; constructing a virtual source according to the reverse source data; acquiring data processed by virtual source interference according to the original seismic data and the virtual source; And generating transverse wave data with improved quality according to the data processed by the virtual seismic source interference.
2. The method for improving the quality of shear wave data according to claim 1, wherein the acquiring reverse source data related to the original seismic data according to the original seismic data specifically comprises: Acquiring seismic source response data according to the original seismic data; and performing time inversion on the seismic source response data to obtain the reverse seismic source data.
3. The method for improving the quality of shear wave data according to claim 1, wherein the acquiring data processed by virtual source interferometry according to the original seismic data and the virtual source specifically comprises: Calculating a cross-correlation function according to the virtual seismic source and the original seismic data; and obtaining the data after the virtual seismic source interference processing according to the cross-correlation function.
4. The method for improving the quality of the shear wave data according to claim 1, wherein the step of generating the shear wave data with improved quality according to a plurality of the data processed by the virtual source interference comprises the following steps: performing differential calculation on the data processed by the virtual seismic source interference to obtain a plurality of enhanced uncorrelated transverse wave data; And generating transverse wave data with improved quality according to the plurality of the enhanced uncorrelated transverse wave data.
5. The method for improving the quality of shear wave data according to claim 4, wherein the performing differential computation on the plurality of data processed by virtual source interferometry to obtain a plurality of enhanced uncorrelated shear wave data specifically comprises: obtaining the difference value between every two different data processed by the virtual source interference in the plurality of data processed by the virtual source interference; and taking each difference value as one enhanced uncorrelated transverse wave data to obtain a plurality of enhanced uncorrelated transverse wave data.
6. The method of claim 4, wherein generating quality enhanced shear wave data from a plurality of said enhanced uncorrelated shear wave data, comprises: and carrying out signal reconstruction on the enhanced uncorrelated transverse wave data to generate transverse wave data with improved quality.
7. The method of improving quality of shear wave data of claim 1, further comprising: And generating a transverse wave image according to the transverse wave data with improved quality.
8. An apparatus for improving the quality of shear wave data, wherein the shear wave data is wave field data characterizing a subsurface geologic structure, the apparatus for improving the quality of shear wave data comprising: An acquisition unit for acquiring raw seismic data generated by each of a plurality of seismic sources generating seismic waves; The first processing unit is used for acquiring reverse seismic source data related to the original seismic data according to the original seismic data; the second processing unit is used for constructing a virtual seismic source according to the reverse seismic source data; the third processing unit is used for acquiring data after interference processing of the virtual seismic source according to the original seismic data and the virtual seismic source; and the fourth processing unit is used for generating transverse wave data with improved quality according to a plurality of data processed through virtual source interference.
9. A storage medium having stored thereon a computer program, which when executed by a processor performs the steps of the method of improving transverse wave data quality according to any of claims 1 to 7.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of improving the quality of shear wave data as claimed in any one of claims 1 to 7 when the computer program is executed by the processor.

Description

Method and device for improving quality of transverse wave data, storage medium and electronic equipment Technical Field The invention belongs to the technical field of geophysical exploration, and particularly relates to a method and device for improving transverse wave data quality, a storage medium and electronic equipment. Background In the field of geophysical prospecting, shear wave data has an irreplaceable important role in accurately identifying subsurface lithology, fluid distribution, and complex geologic structures. The shear wave data itself is relatively weak in energy and is severely aliased with a variety of noise. In the related art, when the original seismic data containing the transverse waves are processed, effective data of the transverse waves are difficult to effectively separate and enhance, so that the finally obtained effective information is fuzzy due to low signal to noise ratio of the transverse wave data, and accurate characterization of an underground structure is seriously affected. Therefore, a triggering method capable of effectively improving the quality of the transverse wave data is urgently needed, and the definition and the usability of the transverse wave data are fundamentally improved. Disclosure of Invention In a first aspect, an embodiment of the present invention provides a method for improving quality of shear wave data, where the shear wave data is wave field data for characterizing a subsurface geologic structure, and the method for improving quality of shear wave data includes obtaining original seismic data generated by each of a plurality of seismic sources, obtaining reverse seismic source data related to the original seismic data according to the original seismic data, constructing a virtual seismic source according to the reverse seismic source data, obtaining data processed by interference of the virtual seismic source according to the original seismic data and the virtual seismic source, and generating quality-improved shear wave data according to the plurality of data processed by interference of the virtual seismic source. In a second aspect, an embodiment of the present invention provides an apparatus for improving quality of shear wave data, where the shear wave data is wavefield data for characterizing a subsurface geological structure, and the apparatus for improving quality of shear wave data includes an acquisition unit configured to acquire raw seismic data generated by each of a plurality of seismic sources, a first processing unit configured to acquire reverse seismic source data related to the raw seismic data according to the raw seismic data, a second processing unit configured to construct a virtual seismic source according to the reverse seismic source data, a third processing unit configured to acquire data after interference processing by the virtual seismic source according to the raw seismic data and the virtual seismic source, and a fourth processing unit configured to generate shear wave data with improved quality according to the plurality of data after interference processing by the virtual seismic source. In a third aspect, embodiments of the present invention provide a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of a method of improving the quality of shear wave data as in the first aspect. In a fourth aspect, an embodiment of the present invention provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of improving the quality of shear wave data as in the first aspect when the computer program is executed by the processor. The beneficial effects brought by the invention are as follows: The method for improving the quality of the transverse wave data can effectively extract and obviously enhance the transverse wave data from the original seismic data, wherein the transverse wave data is wave field data used for representing the underground geological structure. The method comprises the steps of firstly, acquiring original seismic data generated by exciting seismic waves by a plurality of seismic sources, wherein the original seismic data refer to mixed vibration records which are acquired by a geophone array and contain transverse waves and various noises. After the original seismic data is obtained, the invention obtains reverse seismic source data according to the original seismic data, and the process refers to the process of processing and constructing the seismic source response data to obtain new data. The reverse source data is then used to construct a virtual source, i.e., the reverse source data is considered an equivalent source that is counter-propagating from the receiver point location. After the virtual source is constructed, the virtual source is interfered with the original seismic data. Virtual source interfero