CN112505748A - Shot domain reflected wave pickup method and device - Google Patents
Shot domain reflected wave pickup method and device Download PDFInfo
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Abstract
The invention provides a shot domain reflected wave pickup method and a shot domain reflected wave pickup device, wherein the method comprises the following steps: obtaining a CMP gather, and generating a superposition velocity body through velocity analysis according to the CMP gather; superposing the dynamically corrected CMP gather through the superposition velocity body to generate a superposition section; according to geological information of a region corresponding to the superposition imaging section, identifying and picking up time horizons of target stratum reflected waves in different regions of the superposition imaging section on the superposition imaging section; extracting the instantaneous stacking velocity along the layer according to the position of the time layer in the stacking velocity body; obtaining the corresponding in-phase axis of the target stratum reflected wave in the CMP gather according to the time horizon and the along-layer instantaneous stacking speed; and sorting the in-phase axis into shot areas to obtain a data volume picked up by the target stratum reflected wave in the shot areas.
Description
Technical Field
The invention relates to the field of exploration geophysics, in particular to a shot domain reflected wave pickup method and a shot domain reflected wave pickup device.
Background
With the continuous improvement of seismic exploration degree, the requirement on seismic data imaging precision of complex near-surface areas (such as loess tablelands, mountain front zones and the like) is higher and higher. Since errors in the shallow velocity model can cause artifacts in the formation of the migration imaging of the intermediate-deep layers, the precision of the shallow velocity model directly determines the precision and quality of the seismic imaging of the complex near-surface region. In conventional seismic data processing, a shallow velocity model is usually established by adopting first-arrival travel time tomography inversion, but the information content of refracted waves is limited, and an accurate and comprehensive near-surface velocity model is difficult to establish in a complex near-surface area. Compared with the first-arrival wave travel time, the reflected wave carries more abundant underground medium information and can reflect more precise speed of different underground depth positions, so that the industry begins to explore combined speed inversion of the first-arrival wave travel time and the reflected wave travel time in recent years to establish a more accurate shallow velocity model. The first-arrival wave for joint velocity inversion has mature picking method and technology in the industry due to easy identification and picking, but the reflection wave of the same stratum changes in single shot record time and space due to the change of the earth surface and underground structure, and is difficult to accurately pick in large scale before stacking due to the influence of the signal-to-noise ratio of seismic data, so that the application of the first-arrival wave and reflection wave joint velocity inversion in the industry is severely limited.
Disclosure of Invention
The invention aims to provide a shot domain reflected wave pickup method and a shot domain reflected wave pickup device, which solve the problem that the seismic reflected wave of a target interface cannot be directly and accurately and efficiently picked up in a shot domain at present, and are suitable for refracted wave and reflected wave combined chromatography inversion near-surface velocity modeling in a seismic data processing stage.
In order to achieve the above object, the present invention provides a shot domain reflected wave pickup method, including: obtaining a CMP gather, and generating a superposition velocity body through velocity analysis according to the CMP gather; superposing the dynamically corrected CMP gather through the superposition velocity body to generate a superposition section; according to geological information of a region corresponding to the superposition imaging section, identifying and picking up time horizons of target stratum reflected waves in different regions of the superposition imaging section on the superposition imaging section; extracting the instantaneous stacking velocity along the layer according to the position of the time layer in the stacking velocity body; obtaining the corresponding in-phase axis of the target stratum reflected wave in the CMP gather according to the time horizon and the along-layer instantaneous stacking speed; and sorting the in-phase axis into shot areas to obtain a data volume picked up by the target stratum reflected wave in the shot areas.
In the shot domain reflected wave pickup method, it is preferable that before generating the superposition velocity volume by velocity analysis from the CMP gather, the method further includes: anomalous energy and surface waves of a predetermined type in the CMP gather are cancelled.
In the shot domain reflected wave pickup method, preferably, the generating a superposition velocity volume by velocity analysis from the CMP gather includes: and generating a velocity spectrum through the CMP gather, and performing velocity analysis according to the velocity spectrum to generate a superposition velocity body.
In the shot-domain reflected wave pickup method, it is preferable that generating a superimposed profile by superimposing the CMP gather subjected to the motion correction by the superimposed velocity volume includes: and dynamically correcting the CMP gather, and carrying out superposition processing on the dynamically corrected CMP gather through the superposition velocity body to obtain a superposition section.
In the shot domain reflected wave pickup method, preferably, obtaining a corresponding in-phase axis of the target formation reflected wave in the CMP gather according to the time horizon and the in-layer instantaneous stacking velocity includes: and mapping the CMP points in the time horizon to a dynamically corrected CMP gather, and performing reverse correction through the instantaneous stack velocity along the horizon to obtain a corresponding in-phase axis of the target stratum reflected wave in the CMP gather.
The present invention also provides a shot domain reflected wave pickup apparatus, the apparatus comprising: the system comprises an analysis module, a calculation module and a pickup module; the analysis module is used for obtaining a CMP gather and generating a superposition velocity body through velocity analysis according to the CMP gather; superposing the dynamically corrected CMP gather through the superposition velocity body to generate a superposition section; according to geological information of a region corresponding to the superposition imaging section, identifying and picking up time horizons of target stratum reflected waves in different regions of the superposition imaging section on the superposition imaging section; extracting the instantaneous stacking velocity along the layer according to the position of the time layer in the stacking velocity body; the calculation module is used for obtaining the corresponding in-phase axis of the target stratum reflected wave in the CMP gather according to the time horizon and the layer-following instantaneous stacking speed; and the pickup module is used for sorting the in-phase axis into shot domains to obtain a data volume picked up by the target stratum reflected wave in the shot domains.
In the shot domain reflected wave pickup apparatus, preferably, the analysis module further includes a preprocessing unit configured to eliminate a predetermined type of abnormal energy and surface wave in the CMP gather.
In the shot-domain reflected wave pickup apparatus, it is preferable that the calculation module includes: and mapping the CMP points in the time horizon to a dynamically corrected CMP gather, and performing reverse correction through the instantaneous stack velocity along the horizon to obtain a corresponding in-phase axis of the target stratum reflected wave in the CMP gather.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method when executing the computer program.
The present invention also provides a computer-readable storage medium storing a computer program for executing the above method.
The invention has the beneficial technical effects that: the method is characterized in that a target interface reflected wave time horizon is picked up based on a superposition section, and a shot domain is sorted after mapping to a dynamic correction CMP gather and reverse dynamic correction, so that the difficulty of picking up reflected waves in the shot domain directly in a complex near-surface area is overcome, and the shot domain reflected waves can be accurately and efficiently picked up for the combined chromatography inversion of first arrival waves and reflected waves.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1A is a schematic flowchart of a shot domain reflected wave pickup method according to an embodiment of the present invention;
fig. 1B is a schematic application flow diagram of a shot domain reflected wave pickup method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a folded acceleration body in a complex near-surface region in the northwest of China according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a cross-section of a complex near-surface area in northwest and a reflection time horizon of a loess bottom boundary picked according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating the instantaneous velocity of the loess bottom reflection time extracted at the superimposed velocity volume according to an embodiment of the present invention;
FIGS. 5A and 5B are schematic diagrams of a point-by-point mapping of a temporal horizon picked up by a overlay profile to a dynamically-corrected CMP gather according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a dynamic-correction, reverse-correction CMP gather and temporal horizons provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating time horizon sorting into shot regions according to an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating loess bottom reflection and pickup by respectively selecting seismic data of a thick loess area 1, a mountain front area 2 and a thin loess area 3 according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of the thick loess area loess bottom boundary being picked up in the CMP area according to one embodiment of the present invention;
FIG. 10 is a schematic diagram of the loess bottom boundary of the mountain front zone picked up in the CMP area according to one embodiment of the present invention;
FIG. 11 is a schematic diagram of the thin loess area loess bottom boundary being picked up in the CMP area according to one embodiment of the present invention;
FIG. 12 is a schematic diagram of the loess bottom boundary picking and sorting to the shot domain according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a domain reflection wave pickup apparatus according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, unless otherwise specified, the embodiments and features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
Additionally, the steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions and, although a logical order is illustrated in the flow charts, in some cases, the steps illustrated or described may be performed in an order different than here.
Referring to fig. 1A, the shot domain reflected wave pickup method provided by the present invention includes:
102, superposing the dynamically corrected CMP gather through the superposition velocity body to generate a superposition profile;
105, obtaining a corresponding in-phase axis of the target formation reflected wave in the CMP gather according to the time horizon and the along-layer instantaneous stacking velocity;
and 106, sorting the in-phase axis into shot areas to obtain a data volume picked up by the target stratum reflected waves in the shot areas.
Overall, the above embodiment mainly comprises 4 parts, specifically as follows:
analyzing the stacking velocity and establishing a full-area stacking velocity body; combining regional geological recognition and identification on the stacking section and accurately picking up a certain reflection interface imaging time horizon in the whole region, and extracting the instantaneous stacking speed at the time horizon;
mapping the time horizon picked up on the stacking section to each dynamically corrected CMP gather to finish the determination of the time of a certain interface reflected wave in each dynamically corrected CMP gather, and realizing the determination of the time of information in post-stack imaging data in pre-stack data;
step three, applying the instantaneous stacking velocity reverse correction extracted in the step one to the time horizon mapped to each dynamic correction CMP gather to finish the time determination of the reflected wave of a certain interface at different offset distances of the CMP gather;
and step four, sorting the time horizon after the reverse motion correction into shot domains, outputting reflection time data of a certain interface of the shot domains, and finishing the pickup of the reflected waves of the certain interface of the shot domains.
By the embodiment, the shot domain reflected wave picking method provided by the invention can pick the time horizon of the reflected wave of the target interface based on the superposition section, and by the reflected wave picking method of picking the reflected wave of the shot domain after mapping to the dynamic correction CMP gather and the inverse dynamic correction, the time horizon of the reflected wave of a certain geological interface in different areas can be easily and accurately determined and picked by utilizing the direct correspondence between the imaging of the superposition section and the actual geological condition and the advantage that the signal-to-noise ratio of the superposition section is far higher than that of the pre-stack data; then extracting the instantaneous dynamic correction speed along the time horizon picked up by the overlay section for later application of reverse dynamic correction, and simultaneously mapping the picked horizon time value of each CMP point of the overlay section to a dynamic correction CMP gather corresponding to the horizon time value one by one, wherein each dynamic correction CMP gather must have a same phase axis RiAt the position of the mapping time, the extracted instantaneous stacking speed along the layer is used for relatively and dynamically correcting the same-phase axis R of the CMP gatheriEach offset is subjected to inverse correction calculation to obtain the corresponding homodromous axis of a reflected wave of a target interface in each CMP gather, and the homodromous axis is used for calculating the homodromous axisAnd (4) sorting the channel shot domain by the axis, outputting the coordinate and the time value of each channel of the same-direction axis, and finally realizing accurate and efficient pickup of the reflected wave of a certain target interface in the shot domain.
In an embodiment of the invention, generating the stacking velocity volume by velocity analysis according to the CMP gather may further include: eliminating abnormal energy and surface waves of a preset type in the CMP gather; and generating a velocity spectrum through the CMP gather, and performing velocity analysis according to the velocity spectrum to generate a superposition velocity body. Further, the generating of the overlay cross-section by overlaying the dynamically corrected CMP gather through the overlay velocity body comprises: and dynamically correcting the CMP gather, and carrying out superposition processing on the dynamically corrected CMP gather through the superposition velocity body to obtain a superposition section. In another embodiment of the present invention, obtaining the corresponding in-phase axis of the target formation reflection wave in the CMP gather through the time horizon and the along-layer instantaneous stacking velocity comprises: and mapping the CMP points in the time horizon to a dynamically corrected CMP gather, and performing reverse correction through the instantaneous stack velocity along the horizon to obtain a corresponding in-phase axis of the target stratum reflected wave in the CMP gather.
In order to more clearly illustrate the specific application of the above embodiments, the following embodiments are described in combination with specific practical applications, and it should be understood by those skilled in the art that the examples are only illustrative and do not limit the scope of the present application. Taking a typical complex near-surface area seismic data reflected wave pickup in the west as an example, a process of picking up loess bottom boundary reflected waves by applying a shot domain reflected wave pickup method in different near-surface type areas (including thick yellow soil mountains, mountain front zones and gobi) is detailed by combining fig. 1A to fig. 12, and the final pickup effect is shown.
The invention provides a flow chart of a specific embodiment for picking up target interface reflection wave time horizon based on a superposition section, and converting the target interface reflection wave time horizon into a shot domain through series processing, thereby finally realizing accurate and efficient picking up of shot domain reflection waves.
In step 201, a CMP gather that has undergone removal of anomalous energy and surface waves is input. Flow proceeds to step 202.
In step 202, a velocity spectrum is generated and velocity analysis is performed using the initially denoised CMP gather to produce a full-area superimposed root-mean-square velocity volume (as shown in fig. 2). The flow proceeds to step 203.
In step 203, a dynamic correction is performed on the CMP gather. Flow proceeds to step 204.
In step 204, the dynamically calibrated CMP gather is overlaid to generate an overlaid imaging profile of the work area, and certain target interface reflection time horizons (as shown in FIG. 3) are identified and picked up in combination with the geological knowledge of the work area. The flow proceeds to steps 205 and 206, respectively.
In step 205, for the velocity volume generated in step 202, the instantaneous stack root mean square velocity (as shown in FIG. 4) is extracted along the interface reflection time horizon picked in step 204. Flow proceeds to step 206.
At step 206, the temporal horizons picked up at step 205 are mapped CMP-by-CMP to dynamically-corrected CMP gather (as shown in FIGS. 5A and 5B). Flow proceeds to step 207.
In step 207, the time horizons mapped to the dynamically corrected CMP gather in step 206 are inversely corrected along the stacking acceleration generated in step 205, and the inversely corrected time horizons are highly coincident with the reflection event of the CMP gather (as shown in fig. 6). Flow proceeds to step 208.
In step 208, the time horizon after the inverse correction is sorted into the shot domain (as shown in fig. 7), so as to realize the picking of the reflected wave of the shot domain, and the coincidence rate of the homophase axis of the reflected wave observed from the shot domain and the picked time horizon is high.
In step 209, the shot point number, the demodulator point number and the picking time information of the reflected wave information picked in the shot domain are output and form a data body for subsequent joint velocity inversion, so that the picking work of the reflected wave of a target interface in the whole pre-stack shot domain is completed.
In order to illustrate the processing effect of the invention on actual data, 3 different types of earthquake data in the thick yellow soil mountain, the mountain front zone and the gobi zone of the work area are selected to carry out loess bottom boundary pickup (as shown in fig. 8). Because the superposition section is formed by directly superposing the dynamic correction CMP gather, the time of the loess bottom boundary is completely consistent with that of the dynamic correction CMP gather in the section time, the time horizon picked up from the superposition section is mapped to each dynamic correction CMP gather and exactly falls on one in-phase axis of the dynamic correction gather, and the in-phase axis is the reflection of the loess bottom boundary. And (3) performing reverse correction on the loess bottom boundary reflection time horizon on the dynamic correction CMP gather, wherein the time horizon after the reverse correction is well matched with the in-phase axis at different offset distances (as shown in figures 9, 10 and 11). The loess bottom boundary time horizon after the reverse correction is extracted to the shot domain, the loess bottom boundary reflection of the shot domain is picked up, and as can be seen from the graph 12, the loess bottom boundary reflection picked up by the method has high accuracy in the single-shot seismic data of different near-surface types.
Referring to fig. 13, the present invention further provides a shot domain reflected wave pickup apparatus, including: the system comprises an analysis module, a calculation module and a pickup module; the analysis module is used for obtaining a CMP gather and generating a superposition velocity body through velocity analysis according to the CMP gather; superposing the dynamically corrected CMP gather through the superposition velocity body to generate a superposition section; according to geological information of a region corresponding to the superposition imaging section, identifying and picking up time horizons of target stratum reflected waves in different regions of the superposition imaging section on the superposition imaging section; extracting the instantaneous stacking velocity along the layer according to the position of the time layer in the stacking velocity body; the calculation module is used for obtaining the corresponding in-phase axis of the target stratum reflected wave in the CMP gather according to the time horizon and the layer-following instantaneous stacking speed; and the pickup module is used for sorting the in-phase axis into shot domains to obtain a data volume picked up by the target stratum reflected wave in the shot domains.
In the above embodiment, the analysis module further comprises a preprocessing unit for eliminating a predetermined type of abnormal energy and surface wave in the CMP gather. The calculation module includes: and mapping the CMP points in the time horizon to a dynamically corrected CMP gather, and performing reverse correction through the instantaneous stack velocity along the horizon to obtain a corresponding in-phase axis of the target stratum reflected wave in the CMP gather. The specific operation of each module or unit in this embodiment has been illustrated in the foregoing embodiments, and will not be described in detail herein.
The invention has the beneficial technical effects that: the method is characterized in that a target interface reflected wave time horizon is picked up based on a superposition section, and a shot domain is sorted after mapping to a dynamic correction CMP gather and reverse dynamic correction, so that the difficulty of picking up reflected waves in the shot domain directly in a complex near-surface area is overcome, and the shot domain reflected waves can be accurately and efficiently picked up for the combined chromatography inversion of first arrival waves and reflected waves.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method when executing the computer program.
The present invention also provides a computer-readable storage medium storing a computer program for executing the above method.
As shown in fig. 14, the electronic device 600 may further include: communication module 110, input unit 120, audio processing unit 130, display 160, power supply 170. It is noted that the electronic device 600 does not necessarily include all of the components shown in fig. 14; furthermore, the electronic device 600 may also comprise components not shown in fig. 14, which may be referred to in the prior art.
As shown in fig. 14, the central processor 100, sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device, the central processor 100 receiving input and controlling the operation of the various components of the electronic device 600.
The memory 140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. The information relating to the failure may be stored, and a program for executing the information may be stored. And the central processing unit 100 may execute the program stored in the memory 140 to realize information storage or processing, etc.
The input unit 120 provides input to the cpu 100. The input unit 120 is, for example, a key or a touch input device. The power supply 170 is used to provide power to the electronic device 600. The display 160 is used to display an object to be displayed, such as an image or a character. The display may be, for example, an LCD display, but is not limited thereto.
The memory 140 may be a solid state memory such as Read Only Memory (ROM), Random Access Memory (RAM), a SIM card, or the like. There may also be a memory that holds information even when power is off, can be selectively erased, and is provided with more data, an example of which is sometimes called an EPROM or the like. The memory 140 may also be some other type of device. Memory 140 includes buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application/function storage section 142, and the application/function storage section 142 is used to store application programs and function programs or a flow for executing the operation of the electronic device 600 by the central processing unit 100.
The memory 140 may also include a data store 143, the data store 143 for storing data, such as contacts, digital data, pictures, sounds, and/or any other data used by the electronic device. The driver storage portion 144 of the memory 140 may include various drivers of the electronic device for communication functions and/or for performing other functions of the electronic device (e.g., messaging application, address book application, etc.).
The communication module 110 is a transmitter/receiver 110 that transmits and receives signals via an antenna 111. The communication module (transmitter/receiver) 110 is coupled to the central processor 100 to provide an input signal and receive an output signal, which may be the same as in the case of a conventional mobile communication terminal.
Based on different communication technologies, a plurality of communication modules 110, such as a cellular network module, a bluetooth module, and/or a wireless local area network module, may be provided in the same electronic device. The communication module (transmitter/receiver) 110 is also coupled to a speaker 131 and a microphone 132 via an audio processor 130 to provide audio output via the speaker 131 and receive audio input from the microphone 132 to implement general telecommunications functions. Audio processor 130 may include any suitable buffers, decoders, amplifiers and so forth. In addition, an audio processor 130 is also coupled to the central processor 100, so that recording on the local can be enabled through a microphone 132, and so that sound stored on the local can be played through a speaker 131.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A shot domain reflected wave pickup method, comprising:
obtaining a CMP gather, and generating a superposition velocity body through velocity analysis according to the CMP gather;
superposing the dynamically corrected CMP gather through the superposition velocity body to generate a superposition section;
according to geological information of a region corresponding to the superposition imaging section, identifying and picking up time horizons of target stratum reflected waves in different regions of the superposition imaging section on the superposition imaging section;
extracting the instantaneous stacking velocity along the layer according to the position of the time layer in the stacking velocity body;
obtaining the corresponding in-phase axis of the target stratum reflected wave in the CMP gather according to the time horizon and the along-layer instantaneous stacking speed;
and sorting the in-phase axis into shot areas to obtain a data volume picked up by the target stratum reflected wave in the shot areas.
2. The shot domain echo picking method according to claim 1, wherein before generating a velocity stack volume from the CMP gather by velocity analysis, further comprising: anomalous energy and surface waves of a predetermined type in the CMP gather are cancelled.
3. The shot domain echo picking method according to claim 1, wherein generating a stacking velocity volume by velocity analysis from the CMP gather comprises: and generating a velocity spectrum through the CMP gather, and performing velocity analysis according to the velocity spectrum to generate a superposition velocity body.
4. The shot domain echo picking method according to claim 1, wherein generating a stacking profile by stacking the stack velocity volume on the motion-corrected CMP gather comprises: and dynamically correcting the CMP gather, and carrying out superposition processing on the dynamically corrected CMP gather through the superposition velocity body to obtain a superposition section.
5. The shot domain reflected wave picking method of claim 1, wherein obtaining the corresponding in-phase axis of the target formation reflected wave in the CMP gather from the temporal horizon and the in-layer instantaneous stacking velocity comprises: and mapping the CMP points in the time horizon to a dynamically corrected CMP gather, and performing reverse correction through the instantaneous stack velocity along the horizon to obtain a corresponding in-phase axis of the target stratum reflected wave in the CMP gather.
6. An apparatus for picking up a reflected wave in a shot domain, the apparatus comprising: the system comprises an analysis module, a calculation module and a pickup module;
the analysis module is used for obtaining a CMP gather and generating a superposition velocity body through velocity analysis according to the CMP gather; superposing the dynamically corrected CMP gather through the superposition velocity body to generate a superposition section; according to geological information of a region corresponding to the superposition imaging section, identifying and picking up time horizons of target stratum reflected waves in different regions of the superposition imaging section on the superposition imaging section; extracting the instantaneous stacking velocity along the layer according to the position of the time layer in the stacking velocity body;
the calculation module is used for obtaining the corresponding in-phase axis of the target stratum reflected wave in the CMP gather according to the time horizon and the layer-following instantaneous stacking speed;
and the pickup module is used for sorting the in-phase axis into shot domains to obtain a data volume picked up by the target stratum reflected wave in the shot domains.
7. The domain echo pickup device according to claim 6, wherein said analysis module further comprises a preprocessing unit for eliminating a predetermined type of abnormal energy and surface waves in said CMP gather.
8. The shot domain reflected wave pickup apparatus according to claim 6, wherein said calculation module comprises: and mapping the CMP points in the time horizon to a dynamically corrected CMP gather, and performing reverse correction through the instantaneous stack velocity along the horizon to obtain a corresponding in-phase axis of the target stratum reflected wave in the CMP gather.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any of claims 1 to 5 when executing the computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 5.
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