CN106597523B - A kind of controlled source dynamic scan method and device - Google Patents
A kind of controlled source dynamic scan method and device Download PDFInfo
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- CN106597523B CN106597523B CN201611093770.0A CN201611093770A CN106597523B CN 106597523 B CN106597523 B CN 106597523B CN 201611093770 A CN201611093770 A CN 201611093770A CN 106597523 B CN106597523 B CN 106597523B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/003—Seismic data acquisition in general, e.g. survey design
- G01V1/005—Seismic data acquisition in general, e.g. survey design with exploration systems emitting special signals, e.g. frequency swept signals, pulse sequences or slip sweep arrangements
Abstract
The embodiment of the present application provides a kind of controlled source dynamic scan method and device.Wherein, which comprises obtain the big gun spacing and scanning parameter preset of adjacent two big gun in research block, the scanning parameter preset includes: the maximum offset and synchronic distance in the research block；According to the big gun spacing size relation with the maximum offset and the synchronic distance respectively, a kind of optimal scanning mode is determined from default scanning mode set, and be scanned to adjacent two big gun according to the optimal scanning mode.Scan efficiency can be improved in the embodiment of the present application.
Description
Technical field
This application involves seismic exploration technique fields, more particularly, to a kind of controlled source dynamic scan method and device.
Background technique
Seismic prospecting is the important means of exploration oil and gas resource before probing.Oilfield quake investigation and prospecting at present
In, explosive source mainly includes well big gun focus and two kinds of controlled source.Wherein, controlled source is a kind of on-explosive focus,
Cardinal principle is so that its vibration is generated a kind of frequency controllable using on gas or hydro powered soil or aqueous medium light plate
Earthquake source.Controlled source property as known to its source wave form, is widely used in actual production.
The earthquake data acquisition mode of controlled source is also known as scanning mode, and common scanning mode includes that alternating is swept at present
It retouches, slip scan and three kinds of synchronous scanning.Mixed sweep refer to next group of focus when upper one group of focus shakes, in shutdown or
Moving condition, after waiting one group of focus vibration, next group of focus just starts the acquisition mode of vibration.Slip scan refers to next
Group focus need not wait one group of focus vibration to be fully completed the acquisition mode that can start vibration.Synchronous scanning refers to when two groups of shakes
After source standoff distance meets certain requirements, the acquisition mode that can excite simultaneously.
Although these three scanning mode collecting efficiencies respectively have difference, there is the condition of each self application.Mixed sweep
Scan efficiency is limited, but shakes time time interval due to having widened, and two big gun of arbitrary neighborhood is not in vibration overlapping phenomenon, is avoided
Brought harmonic noise, signal-to-noise ratio are relatively high when the scanning of adjacent controlled source；The scan efficiency of slip scan is high, but adjacent two
Big gun is due to there is vibration lap, when two big gun time intervals are smaller, controlled source brought harmonic noise influence when shaking
Also bigger；Synchronous scanning efficiency highest, but have strict requirements to focus spacing.
At present in production operation, a kind of fixation can be only determined in usual research block before earthquake data acquisition
Scanning mode, no matter adjacent two big gun shot position later, is all scanned only with preset scanning mode, this is big
Scan efficiency is reduced greatly.
Summary of the invention
The embodiment of the present application is designed to provide a kind of controlled source dynamic scan method and device, and scanning can be improved
Efficiency.
In order to achieve the above objectives, the embodiment of the present application provides a kind of controlled source dynamic scan method, the method packet
It includes:
It obtains the big gun spacing of adjacent two big gun in research block and scans parameter preset, the scanning parameter preset includes:
Maximum offset and synchronic distance in the research block；
According to the big gun spacing size relation with the maximum offset and the synchronic distance respectively, from default scanning
A kind of optimal scanning mode is determined in mode set, and adjacent two big gun is scanned according to the optimal scanning mode.
In order to achieve the above objectives, the embodiment of the present application also provides a kind of controlled source dynamic scan device, the device packets
It includes:
Parameter acquisition module, it is described for obtaining the big gun spacing and scanning parameter preset of adjacent two big gun in research block
Scanning parameter preset includes: the maximum offset and synchronic distance in the research block；
Scan module, for being closed respectively with the size of the maximum offset and the synchronic distance according to the big gun spacing
System determines a kind of optimal scanning mode from default scanning mode set, and according to the optimal scanning mode to described adjacent
Two big guns are scanned.
The technical solution as provided by above-mentioned the embodiment of the present application is it is found that the embodiment of the present application during the scanning process, passes through
The size relation between the big gun spacing of adjacent two big gun and scanning parameter preset is judged, to determine in default scanning mode set
A kind of optimal scanning mode is scanned adjacent two big gun.Doing using same scanning mode in same research area different from the past
Method is flexibly selected different scanning modes that can integrate the advantage and applicable elements of different scanning mode, is improved according to big gun spacing
Scan efficiency.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present application, constitutes the embodiment of the present application
A part does not constitute the restriction to the embodiment of the present application.In the accompanying drawings:
Fig. 1 is a kind of controlled source dynamic scan method flow schematic diagram of the embodiment of the present application；
Fig. 2 is the scanning mode of the embodiment of the present application as the distance between adjacent two big gun changes schematic diagram；
Fig. 3 is the DS of the embodiment of the present application3Acquire schematic diagram；
Fig. 4 is another scanning mode of the embodiment of the present application as the distance between adjacent two big gun changes schematic diagram
Fig. 5 is the schematic diagram with adjacent shot point spacing dynamic mapping scanning mode of the embodiment of the present application；
Fig. 6 is a kind of controlled source dynamic scan mode determining device schematic diagram of the embodiment of the present application.
Specific embodiment
For the purposes, technical schemes and advantages of the embodiment of the present application are more clearly understood, below with reference to embodiment and attached
Figure, is described in further details the embodiment of the present application.Here, the illustrative embodiments and their description of the embodiment of the present application are used for
It explains the embodiment of the present application, but is not intended as the restriction to the embodiment of the present application.
With reference to the accompanying drawing, the specific embodiment of the embodiment of the present application is described in further detail.
It is as shown in Figure 1 a kind of controlled source dynamic scan method flow schematic diagram of the embodiment of the present application, as shown in fig. 1
This method may comprise steps of:
S101 obtains the big gun spacing and scanning parameter preset of adjacent two big gun in research block, the scanning parameter preset
It include: the maximum offset and synchronic distance in the research block.
Adjacent in adjacent two big gun can refer to two big guns adjacent on firing time in same research area.Obtain adjacent two
The big gun spacing of big gun can be the interval of the shot position of two big guns adjacent on acquisition firing time.It can specifically, obtaining big gun spacing
After completing movement, to send the form of positioning automatically to realize by controlled source.Geophone offset can refer to shot point and detection
The distance between point, the maximum offset can be the maximum distance in research area between shot point and geophone station.The synchronization
Distance can be distance separation synchronous scanning (Distance Separated Simultaneous Sweeping, abbreviation DS3)
The synchronic distance of middle permission.
In one embodiment of the application, obtaining the synchronic distance can be realized by following steps.
Firstly, obtaining refractor velocity, refracted wave intercept and the most deep purpose layer depth in the research block.
In the present embodiment, the refractor velocity and refracted wave intercept can directly pass through the old data in the research area
Or previous experiments obtain.In general, purpose layer depth is indicated using chronomere, the application's in field of seismic exploration
In each embodiment, the most deep purpose layer depth and refracted wave intercept can refer to the purpose layer depth indicated with chronomere
Degree and refracted wave intercept.
Then, the maximum offset, refractor velocity, refracted wave intercept and most deep purpose layer depth are substituted into following
Synchronic distance is calculated in formula.
LDSSS=Lmax+Vr×(Tt-Tin)
In formula, LDSSSIndicate synchronic distance, LmaxIndicate maximum offset, VrIndicate refractor velocity, TtIt indicates with the time
For the most deep purpose layer depth of unit, TinIndicate the refracted wave intercept as unit of the time.
S102, according to the big gun spacing size relation with the maximum offset and the synchronic distance respectively, from pre-
If determining a kind of optimal scanning mode in scanning mode set, and adjacent two big gun is carried out according to the optimal scanning mode
Scanning.
Embodiment as shown in Figure 1 it is found that the embodiment of the present application during the scanning process, between the big gun by judging adjacent two big gun
Away from the size relation between scanning parameter preset, to determine a kind of optimal scanning mode pair in default scanning mode set
Adjacent two big gun is scanned.It is flexible according to big gun spacing using the way of same scanning mode in same research area different from the past
It selects different scanning modes that can integrate the advantage and applicable elements of different scanning mode, improves scan efficiency.
It may include common controlled source in the default scanning mode set in a kind of embodiment of the application
One or more of scanning mode.Specifically, may include one of slip scan, synchronous scanning and mixed sweep or
It is several.
May include: slip scan in one embodiment of the application, in the default scanning mode set with it is synchronous
Scanning.At this point, S102 is when it is implemented, may comprise steps of.
(1) the maximum sliding time in the research block and maximum first arrival time are obtained.
In the present embodiment, the maximum value of the sliding time determined when the maximum sliding time can be slip scan,
Usually maximum sliding time can roughly be estimated as controlled source sweep time with listen the time and half.For example, a certain
In a specific embodiment, the sweep time of controlled source is 12s, and listening the time is 6s, then maximum sliding time can be roughly
It is estimated as 9s.First arrival time is the time that seismic wave reaches each geophone station for the first time, and the maximum first arrival time is the research area
The first arrival time of the farthest receiving point of interior each big gun.
(2) according to the maximum sliding time and the maximum first arrival time, the minimum slip time is obtained.
It, can be by by the maximum sliding time and the maximum first arrival time in one embodiment of the application
Following formula is substituted into, the minimum slip time is calculated,
t0=tmax-tm
In formula, t0Indicate the minimum slip time, tmaxIndicate the maximum first arrival time, tmIndicate the maximum sliding
Time.
In the present embodiment, scanning mode is as shown in Figure 2 as the distance between adjacent two big gun changes schematic diagram.In Fig. 2
Horizontal axis indicates distance, and the longitudinal axis indicates sweep interval, LmaxIndicate maximum offset, LDSSSIndicate synchronic distance, t0It indicates most
Small sliding time, tmaxIndicate maximum first arrival time.
(3) as shown in the middle section Fig. 21, when the big gun spacing be less than or equal to the maximum offset, then use sliding time for
The slip scan of the maximum sliding time is scanned adjacent two big gun.
In the present embodiment, when the big gun spacing of adjacent two big gun is located at section 1, the harmonic wave interference of the 2nd big gun is main interference, therefore
In section 1, sliding time is used to be scanned for the slip scan of the maximum sliding time to adjacent two big gun.
(4) as shown in the middle section Fig. 22, when the big gun spacing be greater than the maximum offset and be less than the synchronic distance, then
Adjacent two big gun is scanned using the slip scan that sliding time can be changed.
When the big gun spacing of adjacent two big gun is located at section 2, influence of the harmonic wave interference to the first bombard can be ignored, and lead at this time
Interfere generated neighbour's big gun noise jamming when successively exciting for two big guns.Experiment shows the interference of the adjacent big gun noise of controlled source
Range is generally all within maximum offset, and the super interference to go beyond the scope can be ignored substantially, as long as this means that adjacent two
The most deep purpose layer depth or more that is recorded in of big gun is not intersected, and would not be interfered between two big guns, be can satisfy data quality
Requirement.
In section 2, when the big gun spacing of adjacent two big gun gradually increases, interferes with each other smaller and smaller, shown as in time-domain
Second big gun is deeper and deeper to the interference position of the first bombard, the requirement for being more than data quality to mutual interference depth, at this time if after
It is continuous to be kept fixed acquisition interval (i.e. maximum sliding time), it will result in the waste of acquisition time, therefore when distance increases, only
The mutual interference depth of two big guns record is able to maintain as the slip scan that acquisition interval is maximum sliding time, so that it may appropriate
Reduce acquisition interval.When depending on travelling of the refracted wave between two big guns because of interference depth, since refraction wave velocity can be considered constant,
Therefore the variation of depth and big gun spacing is interfered linearly to be incremented by relationship, correspondingly, the variation at sliding time interval and big gun spacing are in line
Property is successively decreased relationship.Therefore when big gun spacing gradually increases, it can be used the slip scan of variable sliding time, acquisition interval is from maximum
Sliding time, that is, tmaxLinear decrease is to t0。
In one embodiment of the application, variable sliding time t can be calculated by the following formula to obtain.
In formula, x indicates the big gun spacing of adjacent two big gun.
(5) as shown in the midpoint Fig. 2 A or point B, when the big gun spacing be equal to the synchronic distance, then use sliding time for
The slip scan of the minimum slip time or synchronous scanning are scanned adjacent two big gun.
The synchronic distance can be DS3The synchronic distance allowed in acquisition.DS3It is as described in Figure 3 to acquire schematic diagram, in figure
VP1 and VP2 indicates the shot position of adjacent two big gun, VrIndicate refractor velocity, TtIndicate the most deep target zone as unit of the time
Depth, TinIndicate the refracted wave intercept as unit of the time.
When the big gun spacing is equal to the synchronic distance, since big gun spacing just reaches the condition of sufficient synchronous scanning at this time,
It can choose sliding time at this time to be scanned adjacent two big gun for the slip scan of the minimum slip time or synchronous scanning.
(6) as shown in the middle section Fig. 23, when the big gun spacing is greater than the synchronic distance, then using synchronous scanning to the phase
Adjacent two big guns are scanned.
When big gun spacing is greater than synchronic distance, that is, crosses the A or point B arrival section 3 in Fig. 2, due to having met at this time
The condition of synchronous scanning, so that it may directly adopt synchronous scanning and adjacent two big gun is scanned.
In above embodiment, according to the big gun spacing size relation between maximum offset and synchronic distance respectively, really
Different scanning modes is determined, the way of same scanning mode has been used in same research area different from the past, according to big gun spacing spirit
The advantage and applicable elements living for selecting different scanning modes that can integrate different scanning mode, improves scan efficiency.
In another embodiment of the application, controlled source lays more, the default scanning side described at this time in short distance
It can also include: mixed sweep in formula set.It may include: slip scan in the i.e. described default scanning mode set, alternately sweep
It retouches and synchronous scanning.In the present embodiment, S102 may comprise steps of when implementing.
(1) the maximum sliding time in the research block and maximum first arrival time are obtained.
(2) according to the maximum sliding time and the maximum first arrival time, the minimum slip time is obtained.
It, can be by by the maximum sliding time and the maximum first arrival time in one embodiment of the application
Following formula is substituted into, the minimum slip time is calculated,
t0=tmax-tm
In formula, t0Indicate the minimum slip time, tmaxIndicate the maximum first arrival time, tmIndicate the maximum sliding
Time.
In the present embodiment, another dynamic scan mode is with the distance between adjacent two big gun variation schematic diagram such as Fig. 4
It is shown.Horizontal axis indicates distance in Fig. 4, and the longitudinal axis indicates sweep interval, LmaxIndicate maximum offset, LDSSSIndicate same step pitch
From t0Indicate the minimum slip time, tmaxIndicate maximum first arrival time.
(3) as shown in the middle section Fig. 41, when the spacing of adjacent two big gun is less than or equal to preset length, then adjacent two big gun
Between scanning mode use mixed sweep.
The preset length can for less than the maximum offset a length, specific value can empirically with
And operation field provides.Specifically, the preset length is 1 kilometer in one embodiment of the application.At this point, when between big gun
When away from being less than or equal to 1 kilometer, adjacent two big gun is scanned using mixed sweep.
(4) as shown in the middle section Fig. 42, when the spacing of adjacent two big gun is greater than preset length and is less than or equal to the maximum
Geophone offset, then the scanning mode between adjacent two big gun uses sliding time for the slip scan of the maximum sliding time.
In one embodiment of the application, the preset length is 1 kilometer.At this point, working as the spacing of adjacent two big gun
Greater than 1 kilometer and be less than or equal to the maximum offset, then the scanning mode between adjacent two big gun use sliding time for
The slip scan of the maximum sliding time.
(5) as shown in the middle section Fig. 43, when the spacing of adjacent two big gun is greater than the maximum offset and is less than described same
Step pitch is from the slip scan that then scanning mode between adjacent two big gun uses sliding time can be changed.
In one embodiment of the application, variable sliding time t can be calculated by the following formula to obtain.
In formula, x indicates the big gun spacing of adjacent two big gun.
(6) as shown in the midpoint Fig. 4 A or point B, when the spacing of adjacent two big gun is equal to the synchronic distance, the then phase
Scanning mode between adjacent two big guns uses sliding time for the slip scan of the minimum slip time or synchronous scanning.
(7) as shown in the middle section Fig. 44, when the spacing of adjacent two big gun is greater than the synchronic distance, then adjacent two big gun
Between scanning mode use synchronous scanning.
In the present embodiment, when determining scanning mode according to big gun spacing, it is also contemplated that controlled source in short distance
More situation is laid, so that the optimum scanning mode determined can also take into account data acquisition quality while improving efficiency.
In one embodiment of the application, research area is certain project in northeast, and maximum offset is in the research area
5667.5m, most deep purpose layer depth are 2.3s, and maximum first arrival time is 2.15s, and the maximum sliding time of slip scan is 12s,
Refractor velocity is 2300 meter per seconds, and refracted wave intercept is 1.3s.
(1) maximum offset, refractor velocity, refracted wave intercept and most deep purpose layer depth are substituted into following public
Synchronic distance is calculated in formula,
LDSSS=Lmax+Vr×(Tt-Tin)
=5667.5+2300 × (2.3-1.3)
=7967.5m
In formula, LDSSSIndicate synchronic distance, LmaxIndicate maximum offset, VrIndicate refractor velocity, TtIt indicates with the time
For the most deep purpose layer depth of unit, TinIndicate the refracted wave intercept as unit of the time.
(2) the maximum sliding time and the maximum first arrival time are substituted into following formula, minimum cunning is calculated
The dynamic time,
t0=tmax-tm
=12-2.15
=9.85s
In formula, t0Indicate the minimum slip time, tmaxIndicate maximum first arrival time, tmIndicate maximum sliding time.
(3) schematic diagram with adjacent shot point spacing dynamic mapping scanning mode is drawn according to above-mentioned calculated result, such as Fig. 5 institute
Show.
In Fig. 5, horizontal axis indicates that adjacent two big guns spacing distance, the longitudinal axis indicate that sweep spacing applies.When adjacent two big guns gap digit
When the middle section 1 Fig. 5, use sliding time for the slip scan of 12s.
When adjacent two big gun is located at interval at the middle section 2 Fig. 5, the slip scan that can be changed using sliding time, wherein between big gun
Variable sliding time t away from x variation can be calculated according to following formula.
When the big gun of adjacent two big gun is located at interval at the midpoint Fig. 5 A or B, use sliding time for the slip scan of 9.85s or
Using synchronous scanning.
When adjacent two big gun is located at interval at the middle section 3 Fig. 5, using synchronous scanning.
(4) dynamic scan is carried out according to the description in above-mentioned steps (3) respectively in the research area and conventional slide is swept
It retouches.When being acquired with dynamic scan, subtract intermediate because falling 16 minutes that arrangement does not acquire, effective acquisition time is 72 points
Clock acquires 353 big guns altogether, average 12.2s/ big gun, 5 big guns/minute.It is acquired, is subtracted using conventional slide scanning in the research area again
Centre is gone to because falling 5 minutes that arrangement does not acquire, effective acquisition time totally 55 minutes, acquires 247 big guns altogether, average 13.4s/ big gun, 4
Big gun/minute.
The comparison scanned by above-mentioned dynamic scan and conventional slide is it is found that conventional slide scans compared with dynamic scan
For, scan efficiency improves 25%.
A kind of controlled source dynamic scan device is additionally provided in the embodiment of the present application, as described in the following examples.By
It is similar to a kind of controlled source dynamic scan method in the principle that the device solves the problems, such as, therefore the implementation of the device may refer to
A kind of controlled source dynamic scan method implementation, overlaps will not be repeated.
As shown in fig. 6, a kind of controlled source dynamic scan device provided by the embodiments of the present application may include following
Module.
Parameter acquisition module 601, for obtaining the big gun spacing and scanning parameter preset of adjacent two big gun in research block, institute
Stating scanning parameter preset includes: the maximum offset and synchronic distance in the research block
Scan module 602, for big with the maximum offset and the synchronic distance respectively according to the big gun spacing
Small relationship determines a kind of optimal scanning mode from default scanning mode set, and according to the optimal scanning mode to described
Adjacent two big gun is scanned.
The technical solution as provided by above-mentioned the embodiment of the present application is it is found that the embodiment of the present application during the scanning process, passes through
The size relation between the big gun spacing of adjacent two big gun and scanning parameter preset is judged, to determine in default scanning mode set
A kind of optimal scanning mode is scanned adjacent two big gun.Doing using same scanning mode in same research area different from the past
Method is flexibly selected different scanning modes that can integrate the advantage and applicable elements of different scanning mode, is improved according to big gun spacing
Scan efficiency.
The software mould that the step of method described in the embodiment of the present application can be directly embedded into hardware, processor executes
The combination of block or the two.Software module can store in RAM memory, flash memory, ROM memory, eprom memory,
In eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or this field in other any form of storaging mediums.
Illustratively, storaging medium can be connect with processor, so that processor can read information from storaging medium, and can be with
To storaging medium stored and written information.Optionally, storaging medium can also be integrated into the processor.Processor and storaging medium can be set
It is placed in ASIC, ASIC can be set in user terminal.Optionally, processor and storaging medium also can be set in user's end
In different components in end.
In one or more exemplary designs, above-mentioned function described in the embodiment of the present application can be in hardware, soft
Part, firmware or any combination of this three are realized.If realized in software, these functions be can store and computer-readable
On medium, or it is transferred on a computer readable medium in the form of one or more instructions or code forms.Computer readable medium includes electricity
Brain storaging medium and convenient for so that computer program is allowed to be transferred to from a place telecommunication media in other places.Storaging medium can be with
It is that any general or special computer can be with the useable medium of access.For example, such computer readable media may include but
It is not limited to RAM, ROM, EEPROM, CD-ROM or other optical disc storages, disk storage or other magnetic storage devices or other
What can be used for carry or store with instruct or data structure and it is other can be by general or special computer or general or specially treated
The medium of the program code of device reading form.In addition, any connection can be properly termed computer readable medium, example
Such as, if software is to pass through a coaxial cable, fiber optic cables, double from a web-site, server or other remote resources
Twisted wire, Digital Subscriber Line (DSL) are defined with being also contained in for the wireless way for transmitting such as example infrared, wireless and microwave
In computer readable medium.The disk (disk) and disk (disc) includes compress disk, radium-shine disk, CD, DVD, floppy disk
And Blu-ray Disc, disk is usually with magnetic replicate data, and disk usually carries out optically replicated data with laser.Combinations of the above
Also it may be embodied in computer readable medium.
Particular embodiments described above has carried out further in detail the purpose of the application, technical scheme and beneficial effects
Describe in detail it is bright, it should be understood that being not used to limit this Shen the foregoing is merely the specific embodiment of the embodiment of the present application
Protection scope please, within the spirit and principles of this application, any modification, equivalent substitution, improvement and etc. done should all wrap
Containing within the scope of protection of this application.
Claims (10)
1. a kind of controlled source dynamic scan method, which comprises the following steps:
The big gun spacing and scanning parameter preset of adjacent two big gun in research block are obtained, the scanning parameter preset includes: described
Study the maximum offset and synchronic distance in block；
According to the big gun spacing size relation with the maximum offset and the synchronic distance respectively, from default scanning mode
A kind of optimal scanning mode is determined in set, and adjacent two big gun is scanned according to the optimal scanning mode；Wherein,
It include: slip scan and synchronous scanning in the default scanning mode set,
It is corresponding, it is described according to the big gun spacing size relation with the maximum offset and the synchronic distance respectively, from
Determine a kind of optimal scanning mode in default scanning mode set, and according to the optimal scanning mode to adjacent two big gun into
Row scanning specifically:
Obtain the maximum sliding time in the research block and maximum first arrival time；
According to the maximum sliding time and the maximum first arrival time, the minimum slip time is obtained；
When the big gun spacing be less than or equal to the maximum offset, then use sliding time for it is described maximum sliding time sliding
Scanning is scanned adjacent two big gun；
When the big gun spacing be greater than the maximum offset and be less than the synchronic distance, then using sliding time can be changed sliding
Scanning is scanned adjacent two big gun；
When the big gun spacing be equal to the synchronic distance, then use sliding time for the slip scan of the minimum slip time or synchronization
Scanning is scanned adjacent two big gun；
When the big gun spacing is greater than the synchronic distance, then adjacent two big gun is scanned using synchronous scanning.
2. the method as described in claim 1, which is characterized in that in the default scanning mode set further include: mixed sweep,
When the big gun spacing is less than or equal to preset length, then adjacent two big gun is scanned using mixed sweep；
It is corresponding, it is described to work as the big gun spacing less than or equal to the maximum offset, then use sliding time sliding for the maximum
The slip scan of dynamic time is scanned adjacent two big gun, are as follows:
When the big gun spacing be greater than preset length and be less than or equal to the maximum offset, then use sliding time for the maximum
The slip scan of sliding time is scanned adjacent two big gun.
3. method according to claim 1 or 2, which is characterized in that obtain the synchronic distance specifically,
Obtain refractor velocity, refracted wave intercept and the most deep purpose layer depth in the research block；
The maximum offset, refractor velocity, refracted wave intercept and most deep purpose layer depth are substituted into following formula, calculated
Synchronic distance is obtained,
LDSSS=Lmax+Vr×(Tt-Tin)
In formula, LDSSSIndicate synchronic distance, LmaxIndicate maximum offset, VrIndicate refractor velocity, TtIndicate most deep target zone
Depth, TinIndicate refracted wave intercept.
4. method as claimed in claim 3, which is characterized in that described according to the maximum sliding time and described maximum first
To the time, obtain the minimum slip time specifically,
The maximum sliding time and the maximum first arrival time are substituted into following formula, the minimum slip time is calculated,
t0=tmax-tm
In formula, t0Indicate the minimum slip time, tmaxIndicate maximum first arrival time, tmIndicate maximum sliding time.
5. method as claimed in claim 4, which is characterized in that described when the big gun spacing is greater than the maximum offset and small
When the synchronic distance, variable sliding time t is determined by following formula,
In formula, x indicates the big gun spacing of adjacent two big gun.
6. a kind of controlled source dynamic scan device, which is characterized in that described device includes:
Parameter acquisition module, for obtaining the big gun spacing and scanning parameter preset of adjacent two big gun in research block, the scanning
Parameter preset includes: the maximum offset and synchronic distance in the research block；
Scan module, for according to the big gun spacing size relation with the maximum offset and the synchronic distance respectively,
A kind of optimal scanning mode is determined from default scanning mode set, and according to the optimal scanning mode to adjacent two big gun
It is scanned；Wherein,
It include: slip scan and synchronous scanning in the default scanning mode set,
Corresponding, the scan module includes:
Time acquisition submodule, for obtaining maximum sliding time and maximum first arrival time in the research block；
The minimum slip time obtains submodule, for obtaining according to the maximum sliding time and the maximum first arrival time
The minimum slip time；
First scanning submodule then uses sliding time for institute for being less than or equal to the maximum offset when the big gun spacing
The slip scan for stating maximum sliding time is scanned adjacent two big gun；
Second scanning submodule is then adopted for greater than the maximum offset and being less than the synchronic distance when the big gun spacing
Adjacent two big gun is scanned with the slip scan that sliding time can be changed；
Third scans submodule, for being equal to the synchronic distance when the big gun spacing, then uses sliding time for the minimum slip
The slip scan of time or synchronous scanning are scanned adjacent two big gun；
4th scanning submodule, for being greater than the synchronic distance when the big gun spacing, then using synchronous scanning to described adjacent
Two big guns are scanned.
7. device as claimed in claim 6, which is characterized in that in the default scanning mode set further include: mixed sweep,
It is corresponding, the scan module further include:
5th scanning submodule, for being less than or equal to preset length when the big gun spacing, then using mixed sweep to described adjacent
Two big guns are scanned；
It is corresponding, the first scanning submodule, for when the big gun spacing is greater than preset length and is less than or equal to the maximum
Geophone offset then uses sliding time to be scanned for the slip scan of the maximum sliding time to adjacent two big gun.
8. device as claimed in claims 6 or 7, which is characterized in that the parameter acquisition module includes:
Acquisition submodule, for obtaining refractor velocity, refracted wave intercept and most deep purpose layer depth in the research block
Degree；
Computational submodule was used for the maximum offset, refractor velocity, refracted wave intercept and most deep purpose layer depth generation
Enter following formula, synchronic distance be calculated,
LDSSS=Lmax+Vr×(Tt-Tin)
In formula, LDSSSIndicate synchronic distance, LmaxIndicate maximum offset, VrIndicate refractor velocity, TtIndicate most deep target zone
Depth, TinIndicate refracted wave intercept.
9. device as claimed in claim 8, which is characterized in that the minimum slip time obtains submodule and is specifically used for, will
The maximum sliding time and the maximum first arrival time substitute into following formula, and the minimum slip time is calculated,
t0=tmax-tm
In formula, t0Indicate the minimum slip time, tmaxIndicate maximum first arrival time, tmIndicate maximum sliding time.
10. device as claimed in claim 9, which is characterized in that by following formula determine it is described second scanning submodule in can be changed
Sliding time t,
In formula, x indicates the big gun spacing of adjacent two big gun.
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