CN109725352A - The reflection interval bearing calibration of seismic channel and system - Google Patents
The reflection interval bearing calibration of seismic channel and system Download PDFInfo
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- CN109725352A CN109725352A CN201811390372.4A CN201811390372A CN109725352A CN 109725352 A CN109725352 A CN 109725352A CN 201811390372 A CN201811390372 A CN 201811390372A CN 109725352 A CN109725352 A CN 109725352A
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Abstract
The present invention provides the reflection interval bearing calibration and system of a kind of seismic channel.When calculating the primary wave travelling of the corresponding offset distance of seismic channel when the reflection interval bearing calibration of the seismic channel is travelled according to the primary wave of water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel；The seismic channel corresponding offset distance angle of emergence is calculated when travelling according to the primary wave of the corresponding zero-offset of seismic channel and when the travelling of the primary wave of the corresponding offset distance of seismic channel；Pick up the practical ghost reflection time of occurrence of seismic channel；According to the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and water speed is dragged, the seismic channel corresponding theoretical ghost reflection period is calculated；When being travelled according to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel and the seismic channel corresponding theoretical ghost reflection period calculates the corresponding residual move out time of seismic channel；Seismic channel corresponding reflection interval is corrected according to seismic channel corresponding residual move out time, seismic data imaging can be improved.
Description
Technical field
The present invention relates to seismic prospecting process fields, and in particular, to a kind of reflection interval bearing calibration of seismic channel and
System.
Background technique
During carrying out earthquake data acquisition using towing cable, the sinking depth of each receiving point should be essentially identical.
Show themselves in that primary wave lineups show as smooth hyperbola form in earthquake record, ghost reflection lineups are then substantially with one
Subwave lineups are parallel (ignoring the ghost reflection period within the scope of small offset distance with the variation of incidence angle).But in the construction process, by
The influence of sea situation and cable depthkeeping precision, cable sinking depth is it is difficult to ensure that with detail design strict conformance.Lead to part earthquake
There are apparent lineups changing of the relative positions phenomenons for the sub-bottom reflection of record, and corresponding ghost reflection lineups are also not exclusively parallel with primary wave,
The sinking depth of each geophone station is not inconsistent with projected depth at this time, and the practical reflection interval of seismic channel is caused to deposit with the theoretical reflectance time
In biggish error, seismic data imaging is influenced.
Summary of the invention
The main purpose of the embodiment of the present invention is to provide the reflection interval bearing calibration and system of a kind of seismic channel, with school
The reflection interval of positive seismic channel improves seismic data imaging.
To achieve the goals above, the embodiment of the present invention provides a kind of reflection interval bearing calibration of seismic channel, comprising:
When being travelled according to the primary wave of water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel, meter
When calculating the primary wave travelling of the corresponding offset distance of seismic channel；
According to the primary wave of the corresponding zero-offset of seismic channel travel when and the corresponding offset distance of seismic channel primary wave trip
When row, the corresponding offset distance angle of emergence of seismic channel is calculated；
Pick up the practical ghost reflection time of occurrence of seismic channel；
According to the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and water speed is dragged, it is corresponding to calculate seismic channel
The theoretical ghost reflection period；
When being travelled according to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel and ground
The road corresponding theoretical ghost reflection period is shaken, the corresponding residual move out time of seismic channel is calculated；
Seismic channel corresponding reflection interval is corrected according to seismic channel corresponding residual move out time.
The embodiment of the present invention also provides a kind of reflection interval correction system of seismic channel, comprising:
Unit when primary wave is travelled, for according to water speed, the corresponding offset distance of seismic channel and the corresponding zero bias of seismic channel
Move away from primary wave travelling when, when calculating the primary wave travelling of the corresponding offset distance of seismic channel；
Offset distance angle of emergence unit, for according to the primary wave of the corresponding zero-offset of seismic channel travel when and seismic channel pair
When the primary wave travelling for the offset distance answered, the corresponding offset distance angle of emergence of seismic channel is calculated；
Pickup unit, for picking up the practical ghost reflection time of occurrence of seismic channel；
Theoretical ghost reflection periodic unit drags the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel for basis
And water speed, calculate the seismic channel corresponding theoretical ghost reflection period；
Residual move out time unit, for according to the one of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel
When subwave is travelled and the seismic channel corresponding theoretical ghost reflection period, the corresponding residual move out time of seismic channel is calculated；
Unit is corrected, for being corrected according to the corresponding residual move out time of seismic channel to seismic channel corresponding reflection interval.
The embodiment of the present invention also provides a kind of computer equipment, including memory, processor and storage are on a memory simultaneously
The computer program that can be run on a processor, processor perform the steps of when executing computer program
When being travelled according to the primary wave of water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel, meter
When calculating the primary wave travelling of the corresponding offset distance of seismic channel；
According to the primary wave of the corresponding zero-offset of seismic channel travel when and the corresponding offset distance of seismic channel primary wave trip
When row, the corresponding offset distance angle of emergence of seismic channel is calculated；
Pick up the practical ghost reflection time of occurrence of seismic channel；
According to the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and water speed is dragged, it is corresponding to calculate seismic channel
The theoretical ghost reflection period；
When being travelled according to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel and ground
The road corresponding theoretical ghost reflection period is shaken, the corresponding residual move out time of seismic channel is calculated；
Seismic channel corresponding reflection interval is corrected according to seismic channel corresponding residual move out time.
The embodiment of the present invention also provides a kind of computer readable storage medium, is stored thereon with computer program, computer
It is performed the steps of when program is executed by processor
When being travelled according to the primary wave of water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel, meter
When calculating the primary wave travelling of the corresponding offset distance of seismic channel；
According to the primary wave of the corresponding zero-offset of seismic channel travel when and the corresponding offset distance of seismic channel primary wave trip
When row, the corresponding offset distance angle of emergence of seismic channel is calculated；
Pick up the practical ghost reflection time of occurrence of seismic channel；
According to the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and water speed is dragged, it is corresponding to calculate seismic channel
The theoretical ghost reflection period；
When being travelled according to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel and ground
The road corresponding theoretical ghost reflection period is shaken, the corresponding residual move out time of seismic channel is calculated；
Seismic channel corresponding reflection interval is corrected according to seismic channel corresponding residual move out time.
The reflection interval bearing calibration of the seismic channel of the embodiment of the present invention and system are first corresponding partially according to water speed, seismic channel
Move away from and the corresponding zero-offset of seismic channel primary wave travelling when calculate the primary wave travelling of the corresponding offset distance of seismic channel
When, further according to the corresponding zero-offset of seismic channel primary wave travel when and the corresponding offset distance of seismic channel primary wave travel when
The corresponding offset distance angle of emergence of seismic channel is calculated, then picks up the practical ghost reflection time of occurrence of seismic channel, and according to dragging the reason pulled
By sinking depth, the corresponding offset distance angle of emergence of seismic channel and water speed, the seismic channel corresponding theoretical ghost reflection period is calculated, then root
When travelling according to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel and seismic channel is corresponding
The theoretical ghost reflection period calculates the corresponding residual move out time of seismic channel, finally according to the corresponding residual move out time of seismic channel to seismic channel pair
The reflection interval answered is corrected, and can correct the reflection interval of seismic channel, improves seismic data imaging.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the flow chart of the reflection interval bearing calibration of seismic channel in one embodiment of the invention；
Fig. 2 is the stacked section schematic diagram of the seismic channel of the prior art；
Fig. 3 is the stacked section schematic diagram of the seismic channel of one embodiment of the invention；
Fig. 4 is the structural block diagram of the reflection interval correction system of seismic channel in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The practical reflection interval of the seismic channel obtained in view of the prior art, there are biggish error, shadows with the theoretical reflectance time
Seismic data imaging is rung, the embodiment of the present invention provides a kind of reflection interval bearing calibration of seismic channel, to correct the anti-of seismic channel
It penetrates the time, improves seismic data imaging.Below in conjunction with attached drawing, the present invention is described in detail.
Fig. 1 is the flow chart of the reflection interval bearing calibration of seismic channel in one embodiment of the invention.As shown in Figure 1, earthquake
The reflection interval bearing calibration in road includes:
S101: it is travelled according to the primary wave of water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel
When, when calculating the primary wave travelling of the corresponding offset distance of seismic channel.
S102: according to the primary wave of the corresponding zero-offset of seismic channel travel when and the corresponding offset distance of seismic channel it is primary
When wave is travelled, the corresponding offset distance angle of emergence of seismic channel is calculated.
S103: the practical ghost reflection time of occurrence of seismic channel is picked up.
S104: according to the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and water speed is dragged, seismic channel is calculated
The corresponding theory ghost reflection period.
S105: when being travelled according to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel, with
And the seismic channel corresponding theoretical ghost reflection period, calculate the corresponding residual move out time of seismic channel.
S106: seismic channel corresponding reflection interval is corrected according to seismic channel corresponding residual move out time.
The executing subject of the reflection interval bearing calibration of seismic channel shown in FIG. 1 can be computer.Stream as shown in Figure 1
Journey it is found that the reflection interval bearing calibration of the seismic channel of the embodiment of the present invention first according to water speed, the corresponding offset distance of seismic channel, with
And the corresponding zero-offset of seismic channel primary wave travelling when calculating the primary wave travelling of the corresponding offset distance of seismic channel, then root
Calculate ground when travelling according to the primary wave of the corresponding zero-offset of seismic channel and when the primary wave travelling of the corresponding offset distance of seismic channel
The corresponding offset distance angle of emergence in road is shaken, then picks up the practical ghost reflection time of occurrence of seismic channel, and according to dragging the theoretical sinking pulled
The corresponding offset distance angle of emergence of depth, seismic channel and water speed calculate the seismic channel corresponding theoretical ghost reflection period, then according to earthquake
When the practical ghost reflection time of occurrence in road, the primary wave of the corresponding offset distance of seismic channel are travelled and seismic channel is corresponding theoretical terrible
Wave period calculates the corresponding residual move out time of seismic channel, finally corresponding to seismic channel anti-according to the corresponding residual move out time of seismic channel
Penetrating the time is corrected, and can correct the reflection interval of seismic channel, improves seismic data imaging.
In one embodiment, when being travelled by the primary wave that following formula calculates the corresponding offset distance of seismic channel:
Wherein, when t is the primary wave travelling of offset distance, v is water speed, and x is offset distance, t0For the primary wave trip of zero-offset
When row.
In one embodiment, the corresponding offset distance angle of emergence of seismic channel is calculated by following formula:
θ=cos-1(t0/t)；
Wherein, θ is the offset distance angle of emergence, when t is the primary wave travelling of offset distance, t0It travels for the primary wave of zero-offset
When.
In one embodiment, the seismic channel corresponding theoretical ghost reflection period is calculated by following formula:
Wherein, tgFor the theoretical ghost reflection period, v is water speed, and θ is the offset distance angle of emergence, and h is to drag the theoretical sinking depth pulled.
In one embodiment, the corresponding residual move out time of seismic channel is calculated by following formula:
tc=t1-t-tg；
Wherein, tcFor the corresponding residual move out time of each seismic channel, t1For practical ghost reflection time of occurrence, t is the primary of offset distance
When wave is travelled, tgFor the theoretical ghost reflection period.
The detailed process of the embodiment of the present invention is as follows:
1, when being travelled according to the primary wave of water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel,
When calculating the primary wave travelling of the corresponding offset distance of seismic channel:
Wherein, when t is the primary wave travelling of offset distance, v is water speed, and x is offset distance, t0For the primary wave trip of zero-offset
When row.
2, according to the primary wave of the corresponding zero-offset of seismic channel travel when and the corresponding offset distance of seismic channel primary wave
When travelling, the corresponding offset distance angle of emergence of seismic channel is calculated:
θ=cos-1(t0/t)；
Wherein, θ is the offset distance angle of emergence, when t is the primary wave travelling of offset distance, t0It travels for the primary wave of zero-offset
When.
3, the practical ghost reflection time of occurrence of seismic channel is picked up.
4, according to the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and the water speed is dragged, earthquake is calculated
The road corresponding theoretical ghost reflection period:
Wherein, tgFor the theoretical ghost reflection period, v is water speed, and θ is the offset distance angle of emergence, and h is to drag the theoretical sinking depth pulled.
5, when being travelled according to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel, and
In the seismic channel corresponding theoretical ghost reflection period, calculate the corresponding residual move out time of seismic channel:
tc=t1-t-tg；
Wherein, tcFor the corresponding residual move out time of each seismic channel, t1For practical ghost reflection time of occurrence, t is the primary of offset distance
When wave is travelled, tgFor the theoretical ghost reflection period.
6, seismic channel corresponding reflection interval is corrected according to seismic channel corresponding residual move out time.When it is implemented,
By the corresponding residual move out time of the seismic channel and seismic channel, actually corresponding reflection interval is added, and obtains ideal conditions (drag pull etc. floating)
Under seismic channel corresponding reflection interval.
Fig. 2 is the stacked section schematic diagram of the seismic channel of the prior art.Fig. 3 is the folded of the seismic channel of one embodiment of the invention
Add diagrammatic cross-section.The abscissa of Fig. 2 and Fig. 3 is seismic channel, and ordinate is reflection interval, and unit is the second (s).Such as Fig. 2 and Fig. 3
It is shown, it is compared with the Fig. 2 for not correcting reflection interval error, the earthquake trace-stacking for having corrected Fig. 3 formation of reflection interval error is cutd open
Face is more clear rule, shows that the present invention can improve seismic data imaging.
To sum up, the reflection interval bearing calibration of the seismic channel of the embodiment of the present invention is first corresponding partially according to water speed, seismic channel
Move away from and the corresponding zero-offset of seismic channel primary wave travelling when calculate the primary wave travelling of the corresponding offset distance of seismic channel
When, further according to the corresponding zero-offset of seismic channel primary wave travel when and the corresponding offset distance of seismic channel primary wave travel when
The corresponding offset distance angle of emergence of seismic channel is calculated, then picks up the practical ghost reflection time of occurrence of seismic channel, and according to dragging the reason pulled
By sinking depth, the corresponding offset distance angle of emergence of seismic channel and water speed, the seismic channel corresponding theoretical ghost reflection period is calculated, then root
When travelling according to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel and seismic channel is corresponding
The theoretical ghost reflection period calculates the corresponding residual move out time of seismic channel, finally according to the corresponding residual move out time of seismic channel to seismic channel pair
The reflection interval answered is corrected, and can correct the reflection interval of seismic channel, improves seismic data imaging.
Based on the same inventive concept, the embodiment of the invention also provides a kind of reflection intervals of seismic channel to correct system, by
It is similar to the reflection interval bearing calibration of seismic channel in the principle that the system solves the problems, such as, therefore the implementation of the system may refer to
The implementation of method, overlaps will not be repeated.
Fig. 4 is the structural block diagram of the reflection interval correction system of seismic channel in the embodiment of the present invention.As shown in figure 4, earthquake
The reflection interval in road corrects system
Unit when primary wave is travelled, for according to water speed, the corresponding offset distance of seismic channel and the corresponding zero bias of seismic channel
Move away from primary wave travelling when, when calculating the primary wave travelling of the corresponding offset distance of seismic channel；
Offset distance angle of emergence unit, for according to the primary wave of the corresponding zero-offset of seismic channel travel when and seismic channel pair
When the primary wave travelling for the offset distance answered, the corresponding offset distance angle of emergence of seismic channel is calculated；
Pickup unit, for picking up the practical ghost reflection time of occurrence of seismic channel；
Theoretical ghost reflection periodic unit drags the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel for basis
And water speed, calculate the seismic channel corresponding theoretical ghost reflection period；
Residual move out time unit, for according to the one of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel
When subwave is travelled and the seismic channel corresponding theoretical ghost reflection period, the corresponding residual move out time of seismic channel is calculated；
Unit is corrected, for being corrected according to the corresponding residual move out time of seismic channel to seismic channel corresponding reflection interval.
In a kind of wherein embodiment, when being travelled by the primary wave that following formula calculates the corresponding offset distance of seismic channel:
Wherein, when t is the primary wave travelling of offset distance, v is water speed, and x is offset distance, t0For the primary wave trip of zero-offset
When row.
In a kind of wherein embodiment, the corresponding offset distance angle of emergence of seismic channel is calculated by following formula:
θ=cos-1(t0/t)；
Wherein, θ is the offset distance angle of emergence, when t is the primary wave travelling of offset distance, t0It travels for the primary wave of zero-offset
When.
In a kind of wherein embodiment, the seismic channel corresponding theoretical ghost reflection period is calculated by following formula:
Wherein, tgFor the theoretical ghost reflection period, v is water speed, and θ is the offset distance angle of emergence, and h is to drag the theoretical sinking depth pulled.
In a kind of wherein embodiment, the corresponding residual move out time of seismic channel is calculated by following formula:
tc=t1-t-tg；
Wherein, tcFor the corresponding residual move out time of each seismic channel, t1For practical ghost reflection time of occurrence, t is the primary of offset distance
When wave is travelled, tgFor the theoretical ghost reflection period.
To sum up, the reflection interval correction system of the seismic channel of the embodiment of the present invention is first corresponding partially according to water speed, seismic channel
Move away from and the corresponding zero-offset of seismic channel primary wave travelling when calculate the primary wave travelling of the corresponding offset distance of seismic channel
When, further according to the corresponding zero-offset of seismic channel primary wave travel when and the corresponding offset distance of seismic channel primary wave travel when
The corresponding offset distance angle of emergence of seismic channel is calculated, then picks up the practical ghost reflection time of occurrence of seismic channel, and according to dragging the reason pulled
By sinking depth, the corresponding offset distance angle of emergence of seismic channel and water speed, the seismic channel corresponding theoretical ghost reflection period is calculated, then root
When travelling according to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel and seismic channel is corresponding
The theoretical ghost reflection period calculates the corresponding residual move out time of seismic channel, finally according to the corresponding residual move out time of seismic channel to seismic channel pair
The reflection interval answered is corrected, and can correct the reflection interval of seismic channel, improves seismic data imaging.
The embodiment of the invention also provides a kind of computer equipments, including memory, processor and storage are on a memory
And the computer program that can be run on a processor, processor perform the steps of when executing computer program
When being travelled according to the primary wave of water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel, meter
When calculating the primary wave travelling of the corresponding offset distance of seismic channel；
According to the primary wave of the corresponding zero-offset of seismic channel travel when and the corresponding offset distance of seismic channel primary wave trip
When row, the corresponding offset distance angle of emergence of seismic channel is calculated；
Pick up the practical ghost reflection time of occurrence of seismic channel；
According to the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and the water speed is dragged, seismic channel is calculated
The corresponding theory ghost reflection period；
When being travelled according to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel and ground
The road corresponding theoretical ghost reflection period is shaken, the corresponding residual move out time of seismic channel is calculated；
Seismic channel corresponding reflection interval is corrected according to seismic channel corresponding residual move out time.
To sum up, the computer equipment of the embodiment of the present invention is first according to water speed, the corresponding offset distance of seismic channel and seismic channel
When calculating the primary wave travelling of the corresponding offset distance of seismic channel when the primary wave travelling of corresponding zero-offset, further according to seismic channel
It is corresponding that seismic channel is calculated when the primary wave travelling of corresponding zero-offset and when the primary wave travelling of the corresponding offset distance of seismic channel
The offset distance angle of emergence, then pick up the practical ghost reflection time of occurrence of seismic channel, and according to dragging the theoretical sinking depth pulled, earthquake
The corresponding offset distance angle of emergence in road and water speed calculate the seismic channel corresponding theoretical ghost reflection period, then according to the reality of seismic channel
When the primary wave travelling of the corresponding offset distance of ghost reflection time of occurrence, seismic channel and the seismic channel corresponding theoretical ghost reflection period, meter
The corresponding residual move out time of seismic channel is calculated, finally seismic channel corresponding reflection interval is carried out according to seismic channel corresponding residual move out time
Correction can correct the reflection interval of seismic channel, improve seismic data imaging.
The embodiment of the invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, calculate
Machine program performs the steps of when being executed by processor
When being travelled according to the primary wave of water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel, meter
When calculating the primary wave travelling of the corresponding offset distance of seismic channel；
According to the primary wave of the corresponding zero-offset of seismic channel travel when and the corresponding offset distance of seismic channel primary wave trip
When row, the corresponding offset distance angle of emergence of seismic channel is calculated；
Pick up the practical ghost reflection time of occurrence of seismic channel；
According to the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and the water speed is dragged, seismic channel is calculated
The corresponding theory ghost reflection period；
When being travelled according to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel and ground
The road corresponding theoretical ghost reflection period is shaken, the corresponding residual move out time of seismic channel is calculated；
Seismic channel corresponding reflection interval is corrected according to seismic channel corresponding residual move out time.
To sum up, the computer readable storage medium of the embodiment of the present invention is first according to water speed, the corresponding offset distance of seismic channel, with
And the corresponding zero-offset of seismic channel primary wave travelling when calculating the primary wave travelling of the corresponding offset distance of seismic channel, then root
Calculate ground when travelling according to the primary wave of the corresponding zero-offset of seismic channel and when the primary wave travelling of the corresponding offset distance of seismic channel
The corresponding offset distance angle of emergence in road is shaken, then picks up the practical ghost reflection time of occurrence of seismic channel, and according to dragging the theoretical sinking pulled
The corresponding offset distance angle of emergence of depth, seismic channel and water speed calculate the seismic channel corresponding theoretical ghost reflection period, then according to earthquake
When the practical ghost reflection time of occurrence in road, the primary wave of the corresponding offset distance of seismic channel are travelled and seismic channel is corresponding theoretical terrible
Wave period calculates the corresponding residual move out time of seismic channel, finally corresponding to seismic channel anti-according to the corresponding residual move out time of seismic channel
Penetrating the time is corrected, and can correct the reflection interval of seismic channel, improves seismic data imaging.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail it is bright, it should be understood that the above is only a specific embodiment of the present invention, the guarantor being not intended to limit the present invention
Range is protected, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (12)
1. a kind of reflection interval bearing calibration of seismic channel characterized by comprising
When travelling according to the primary wave of water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel, calculate ground
When shaking the primary wave travelling of the corresponding offset distance in road；
According to the primary wave of the corresponding zero-offset of the seismic channel travel when and the corresponding offset distance of the seismic channel it is primary
When wave is travelled, the corresponding offset distance angle of emergence of seismic channel is calculated；
Pick up the practical ghost reflection time of occurrence of seismic channel；
According to the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and the water speed is dragged, it is corresponding to calculate seismic channel
The theoretical ghost reflection period；
According to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel travel when and seismic channel
The corresponding theory ghost reflection period calculates the corresponding residual move out time of seismic channel；
Seismic channel corresponding reflection interval is corrected according to the seismic channel corresponding residual move out time.
2. the reflection interval bearing calibration of seismic channel according to claim 1, which is characterized in that calculated by following formula
When the primary wave travelling of the corresponding offset distance of seismic channel:
Wherein, when t is the primary wave travelling of offset distance, v is water speed, and x is offset distance, t0When travelling for the primary wave of zero-offset.
3. the reflection interval bearing calibration of seismic channel according to claim 1, which is characterized in that calculated by following formula
The corresponding offset distance angle of emergence of seismic channel:
θ=cos-1(t0/t)；
Wherein, θ is the offset distance angle of emergence, when t is the primary wave travelling of offset distance, t0When travelling for the primary wave of zero-offset.
4. the reflection interval bearing calibration of seismic channel according to claim 1, which is characterized in that calculated by following formula
The seismic channel corresponding theoretical ghost reflection period:
Wherein, tgFor the theoretical ghost reflection period, v is water speed, and θ is the offset distance angle of emergence, and h is to drag the theoretical sinking depth pulled.
5. the reflection interval bearing calibration of seismic channel according to claim 1, which is characterized in that calculated by following formula
The corresponding residual move out time of seismic channel:
tc=t1-t-tg；
Wherein, tcFor the corresponding residual move out time of each seismic channel, t1For practical ghost reflection time of occurrence, t is the primary wave trip of offset distance
When row, tgFor the theoretical ghost reflection period.
6. a kind of reflection interval of seismic channel corrects system characterized by comprising
Unit when primary wave is travelled, for according to water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel
Primary wave travelling when, when calculating the primary wave travelling of the corresponding offset distance of seismic channel；
Offset distance angle of emergence unit, for according to the primary wave of the corresponding zero-offset of the seismic channel travel when and the earthquake
When the primary wave travelling of the corresponding offset distance in road, the corresponding offset distance angle of emergence of seismic channel is calculated；
Pickup unit, for picking up the practical ghost reflection time of occurrence of seismic channel；
Theoretical ghost reflection periodic unit drags the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and institute for basis
Water speed is stated, the seismic channel corresponding theoretical ghost reflection period is calculated；
Residual move out time unit, for the primary wave according to the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel
When travelling and the seismic channel corresponding theoretical ghost reflection period, the corresponding residual move out time of seismic channel is calculated；
Unit is corrected, for being corrected according to the corresponding residual move out time of the seismic channel to seismic channel corresponding reflection interval.
7. the reflection interval of seismic channel according to claim 6 corrects system, which is characterized in that calculated by following formula
When the primary wave travelling of the corresponding offset distance of seismic channel:
Wherein, when t is the primary wave travelling of offset distance, v is water speed, and x is offset distance, t0When travelling for the primary wave of zero-offset.
8. the reflection interval of seismic channel according to claim 6 corrects system, which is characterized in that calculated by following formula
The corresponding offset distance angle of emergence of seismic channel:
θ=cos-1(t0/t)；
Wherein, θ is the offset distance angle of emergence, when t is the primary wave travelling of offset distance, t0When travelling for the primary wave of zero-offset.
9. the reflection interval of seismic channel according to claim 6 corrects system, which is characterized in that calculated by following formula
The seismic channel corresponding theoretical ghost reflection period:
Wherein, tgFor the theoretical ghost reflection period, v is water speed, and θ is the offset distance angle of emergence, and h is to drag the theoretical sinking depth pulled.
10. the reflection interval of seismic channel according to claim 6 corrects system, which is characterized in that pass through following formula meter
Calculate the corresponding residual move out time of seismic channel:
tc=t1-t-tg；
Wherein, tcFor the corresponding residual move out time of each seismic channel, t1For practical ghost reflection time of occurrence, t is the primary wave trip of offset distance
When row, tgFor the theoretical ghost reflection period.
11. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that the processor performs the steps of when executing the computer program
When travelling according to the primary wave of water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel, calculate ground
When shaking the primary wave travelling of the corresponding offset distance in road；
According to the primary wave of the corresponding zero-offset of the seismic channel travel when and the corresponding offset distance of the seismic channel it is primary
When wave is travelled, the corresponding offset distance angle of emergence of seismic channel is calculated；
Pick up the practical ghost reflection time of occurrence of seismic channel；
According to the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and the water speed is dragged, it is corresponding to calculate seismic channel
The theoretical ghost reflection period；
According to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel travel when and seismic channel
The corresponding theory ghost reflection period calculates the corresponding residual move out time of seismic channel；
Seismic channel corresponding reflection interval is corrected according to the seismic channel corresponding residual move out time.
12. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
It is performed the steps of when being executed by processor
When travelling according to the primary wave of water speed, the corresponding offset distance of seismic channel and the corresponding zero-offset of seismic channel, calculate ground
When shaking the primary wave travelling of the corresponding offset distance in road；
According to the primary wave of the corresponding zero-offset of the seismic channel travel when and the corresponding offset distance of the seismic channel it is primary
When wave is travelled, the corresponding offset distance angle of emergence of seismic channel is calculated；
Pick up the practical ghost reflection time of occurrence of seismic channel；
According to the theoretical sinking depth pulled, the corresponding offset distance angle of emergence of seismic channel and the water speed is dragged, it is corresponding to calculate seismic channel
The theoretical ghost reflection period；
According to the primary wave of the practical ghost reflection time of occurrence of seismic channel, the corresponding offset distance of seismic channel travel when and seismic channel
The corresponding theory ghost reflection period calculates the corresponding residual move out time of seismic channel；
Seismic channel corresponding reflection interval is corrected according to the seismic channel corresponding residual move out time.
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