CN107167841A - Obtain the method and system of the common orientation angular domain trace gather of common offset - Google Patents
Obtain the method and system of the common orientation angular domain trace gather of common offset Download PDFInfo
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- CN107167841A CN107167841A CN201610130313.8A CN201610130313A CN107167841A CN 107167841 A CN107167841 A CN 107167841A CN 201610130313 A CN201610130313 A CN 201610130313A CN 107167841 A CN107167841 A CN 107167841A
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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
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/70—Other details related to processing
- G01V2210/74—Visualisation of seismic data
Abstract
The present invention provides a kind of method and system for obtaining the common orientation angular domain trace gather of common offset.This method includes：Geological data is sorted into n × m cross arrangement domain trace gather, to each cross arrangement domain trace gather, seisline according to the perpendicular offset of shot line after halving and after halving obtains common offset azimuth cells altogether away from divide, centered on the trace gather center of cross arrangement domain, the principle for merging into the common orientation angular domain trace gather unit of a common offset according to the common azimuth cells of every four adjacent common offsets obtains common offset orientation angular domain trace gather unit altogether, and orientation angular domain trace gather unit is numbered successively in order altogether to common offset, finally collect the common orientation angular domain trace gather unit of common offset of identical numbering in the trace gather of all cross arrangement domains, obtain common offset orientation angular domain trace gather altogether.The offset distance scope of the common orientation angle gathers of common offset, the discontinuity of reduction offset distance distribution so that the offset distance transition between trace gather is smoother can be reduced.
Description
Technical field
Offset altogether the present invention relates to petroleum exploration seismic data processing technology field, more particularly to a kind of obtain
Method and system away from common orientation angular domain trace gather.
Background technology
Compared with common seismic data, the azimuth of wide-azimuth high-density seismic acquisition data and geophone offset point
Cloth scope is more extensively and evenly.How fully to excavate and utilize richness in wide-azimuth high-density seismic acquisition data
The magnanimity high-quality wide-azimuth earthquake information contained, is the real problem that seismic data process faces.In recent years
The common azimuth of the common offset of appearance (Common Offset Common Azimuth, hereinafter referred to as：
COCA) technology fast development, COCA technical staff's industry is also referred to as geophone offset slice of vector (Offset Vector
Tile, abbreviation OVT) and the vectorial chip technology of technology or common offset (Common Offset Vector, referred to as
COV) technology, COCA technologies is farthest provide using migration before stack away from, azimuth information
Basis.The technology considers the azimuthal anisotropy problem that wide-azimuth observation is brought, and is conducive to improving earthquake
Imaging precision；The technology can retain geophone offset and azimuth information in processing procedure simultaneously, be conducive to
Carry out crack elimination prediction work.With going deep into for the technical research and application, even to this day, COCA
Technology turns into the core technology of wide-azimuth seism processing, in complicated seismic imaging and layer description
Play irreplaceable effect.
Obtain common offset altogether orientation angular domain trace gather be COCA technologies it is most basic be also most important first
Step.Existing acquisition methods are：1st, geological data is sorted into n × m cross arrangement seismic-data traces
Collection, n is the number of the big gun line in cross arrangement observation system, and m is to be examined in cross arrangement observation system
The number of swash.2nd, cross arrangement geological data trace gather is entered away from equidistant according to perpendicular offset of shot line and seisline
Row, which is divided, obtains common offset azimuth cells altogether, and azimuth cells are numbered altogether to common offset.3、
Each cross arrangement seismic-data traces are concentrated into the common azimuth cells of the common offset of the identical numbering of same quadrant
Extract and combine, just obtain common offset orientation angular domain trace gather altogether.
As stated above, the offset distance scope of the common orientation angular domain trace gather of the common offset of acquisition is larger, generally
Perpendicular offset of shot line or seisline away from 2 times or so, the offset distance of each common offset altogether between orientation angular domain trace gather
There is saltus step in transition, orientation angular domain trace gather is total to especially about big gun line and seisline point of intersection common offset
Offset distance scope is very big, and very strong acquisition footprint can be brought to end result data volume, be unfavorable for shallow-layer into
Picture.
The content of the invention
The present invention provides a kind of method and system for obtaining the common orientation angular domain trace gather of common offset, can reduce altogether
The offset distance scope of the common orientation angle gathers of offset distance, the discontinuity of reduction offset distance distribution so that trace gather
Between offset distance transition it is smoother.
In a first aspect, the present invention provides a kind of method for obtaining the common orientation angular domain trace gather of common offset, including：
Geological data is sorted into n × m cross arrangement domain trace gather, n is the number of big gun line in observation system,
M is the number of seisline in observation system；
To each cross arrangement domain trace gather, seisline according to the perpendicular offset of shot line after halving and after halving is away from entering
Row, which is divided, obtains common offset azimuth cells altogether；
Centered on the trace gather center of cross arrangement domain, according to every four adjacent common offsets, azimuth is single altogether
The principle that member merges into the common orientation angular domain trace gather unit of a common offset obtains common offset orientation angular domain altogether
Trace gather unit, and orientation angular domain trace gather unit is numbered successively in order altogether to common offset；
The common orientation angular domain trace gather unit of common offset of identical numbering in the trace gather of all cross arrangement domains is collected,
Obtain common offset orientation angular domain trace gather altogether.
Further, it is adjacent inclined altogether according to every four centered on the trace gather center by cross arrangement domain
Move the principle for merging into the common orientation angular domain trace gather unit of a common offset away from common azimuth cells and obtain inclined altogether
Move away from common orientation angular domain trace gather unit, including：
By near four common offsets at cross arrangement domain trace gather center, azimuth cells merge into one altogether
The common orientation angular domain trace gather unit of common offset, centered on the common offset altogether orientation angular domain trace gather unit,
Respectively along the direction of big gun line and seisline, by every four adjacent common offsets, azimuth cells merge altogether
Orientation angular domain trace gather unit is total to for a common offset, wherein, positioned at four borders of cross arrangement domain trace gather
Azimuth cells are four common offsets orientation angular domain trace gather unit altogether to four common offsets of point altogether, remaining
Be located at cross arrangement domain trace gather four edges circle on common offset altogether orientation angular domain trace gather unit include two
The common azimuth cells of common offset.
It is further, described that to common offset, orientation angular domain trace gather unit is numbered successively in order altogether,
Including：
Compiled successively in sequence the common orientation angular domain trace gather unit of common offset at boundary point
Number.
It is further, described that to common offset, orientation angular domain trace gather unit is numbered successively in order altogether,
Including：
Common offset at boundary point altogether orientation angular domain trace gather unit along big gun examine line in sequence according to
It is secondary to be numbered.
Further, the number and the geological data of the common orientation angular domain trace gather unit of the common offset
Degree of covering is equal.
Second aspect, the present invention provides a kind of system for obtaining the common orientation angular domain trace gather of common offset, including：
Seismic data process module, for geological data to be sorted into n × m cross arrangement domain trace gather, n
For the number of big gun line in observation system, m is the number of seisline in observation system；
Division module, for each cross arrangement domain trace gather, according to the perpendicular offset of shot line after halving and halves
Seisline afterwards obtains common offset azimuth cells altogether away from division is carried out；
Composite module, it is adjacent inclined altogether according to every four for centered on the trace gather center of cross arrangement domain
Move the principle for merging into the common orientation angular domain trace gather unit of a common offset away from common azimuth cells and obtain inclined altogether
Move away from common orientation angular domain trace gather unit, and orientation angular domain trace gather unit enters successively in order altogether to common offset
Line number；
Acquisition module, the common orientation of common offset for collecting identical numbering in the trace gather of all cross arrangement domains
Angular domain trace gather unit, obtains common offset orientation angular domain trace gather altogether.
Further, the division module specifically for：
By near four common offsets at cross arrangement domain trace gather center, azimuth cells merge into one altogether
The common orientation angular domain trace gather unit of common offset, centered on the common offset altogether orientation angular domain trace gather unit,
Respectively along the direction of big gun line and seisline, by every four adjacent common offsets, azimuth cells merge altogether
Orientation angular domain trace gather unit is total to for a common offset, wherein, positioned at four borders of cross arrangement domain trace gather
Azimuth cells are four common offsets orientation angular domain trace gather unit altogether to four common offsets of point altogether, remaining
Be located at cross arrangement domain trace gather four edges circle on common offset altogether orientation angular domain trace gather unit include two
The common azimuth cells of common offset.
Further, the division module specifically for：
Compiled successively in sequence the common orientation angular domain trace gather unit of common offset at boundary point
Number.
Further, the division module specifically for：
Common offset at boundary point altogether orientation angular domain trace gather unit along big gun examine line in sequence according to
It is secondary to be numbered.
Further, the number and the geological data of the common orientation angular domain trace gather unit of the common offset
Degree of covering is equal.
What the present invention was provided obtains the method and system of the common orientation angular domain trace gather of common offset, by with cross
Centered on arranging domain trace gather center, by perpendicular offset of shot line and seisline away from after halving to each cross arrangement domain trace gather
Divide and obtain common offset azimuth cells, then centered on the trace gather center of cross arrangement domain, press altogether
According to every four adjacent common offsets, azimuth cells merge into common offset orientation angular domain trace gather altogether altogether
The principle of unit obtains common offset orientation angular domain trace gather unit altogether, and to the common orientation angular domain road of common offset
Collection unit is numbered, and the common offset for finally collecting identical numbering in the trace gather of all cross arrangement domains is square altogether
Parallactic angle domain trace gather unit, obtains common offset orientation angular domain trace gather altogether, reduces each common offset side altogether
The offset distance of parallactic angle domain trace gather, and then the offset distance scope of the common orientation angular domain trace gather of common offset is reduced,
Therefore the discontinuity of offset distance distribution is reduced so that the offset distance transition between trace gather is smoother, and
It ensure that cross arrangement domain trace gather center has smallest offset away from having suppressed acquisition footprint, be more beneficial for shallow
Layer imaging.
Brief description of the drawings
In order to illustrate more clearly of technical scheme of the invention or of the prior art, below will to embodiment or
The accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 obtains the flow chart of the embodiment of the method one of the common orientation angular domain trace gather of common offset for the present invention；
Fig. 2 is the schematic diagram for the common orientation angular domain trace gather of common offset that existing method is obtained；
Fig. 3 obtains the flow chart of the embodiment of the method two of the common orientation angular domain trace gather of common offset for the present invention；
Fig. 4 is obtained in the embodiment of the method two of the common orientation angular domain trace gather of common offset for the present invention and is divided cross
Arrange the schematic diagram after the trace gather of domain；
Fig. 5 is common offset in present invention acquisition common offset altogether embodiment of the method two of orientation angular domain trace gather
The division result schematic diagram of common orientation angular domain trace gather unit；
Fig. 6 is the offset distance scope of the common orientation angular domain trace gather of common offset obtained using the method for the present invention
With the offset distance scope contrast schematic diagram of the common orientation angular domain trace gather of common offset obtained using existing method；
Fig. 7 is that the common orientation angular domain trace gather of common offset obtained using above-mentioned two kinds of division methods is folded
Preceding time migration Contrast on effect schematic diagram；
The knot for the system embodiment one for obtaining the common orientation angular domain trace gather of common offset that Fig. 8 provides for the present invention
Structure schematic diagram.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the present invention
Accompanying drawing, the technical scheme in the present invention is clearly and completely described, it is clear that described implementation
Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention,
The every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
Fig. 1 obtains the flow chart of the embodiment of the method one of the common orientation angular domain trace gather of common offset for the present invention,
As shown in figure 1, the method for the present embodiment can include：
S101, geological data sorts into n × m cross arrangement domain trace gather, n is big gun line in observation system
Number, m be observation system in seisline number.
S102, to each cross arrangement domain trace gather, the detection according to the perpendicular offset of shot line after halving and after halving
Line-spacing, which divide, obtains common offset azimuth cells altogether.
Usually, perpendicular offset of shot line and seisline be away from equidistant, and perpendicular offset of shot line and seisline are away from being also equidistant after halving
From, seisline according to the perpendicular offset of shot line after halving and after halving away from divide obtaining multiple square decimals
According to each square shape small data is common offset azimuth cells altogether.
S103, centered on the trace gather center of cross arrangement domain, according to every four adjacent common offsets altogether side
The principle that parallactic angle unit merges into the common orientation angular domain trace gather unit of a common offset obtains common offset side altogether
Parallactic angle domain trace gather unit, and orientation angular domain trace gather unit is numbered successively in order altogether to common offset.
Specifically, by near four common offsets at cross arrangement domain trace gather center, azimuth cells are closed altogether
And be common offset orientation angular domain trace gather unit altogether, using common offset altogether orientation angular domain trace gather unit as
Center, respectively along the direction of big gun line and seisline, by every four adjacent common offsets, azimuth is single altogether
Member merges into common offset orientation angular domain trace gather unit altogether, wherein, positioned at cross arrangement domain trace gather four
Azimuth cells are four common offsets orientation angular domain trace gather list altogether to four common offsets of individual boundary point altogether
Member, the common orientation angular domain trace gather unit of the remaining common offset on trace gather four edges circle of cross arrangement domain
Including the common azimuth cells of two common offsets.
To common offset, orientation angular domain trace gather unit is numbered altogether, can be from the common skew at boundary point
Start to be numbered successively in sequence away from common orientation angular domain trace gather unit.Or can also be from boundary point
Orientation angular domain trace gather unit starts to be numbered successively in sequence along big gun inspection line the common offset at place altogether.
S104, the common orientation angular domain trace gather of common offset for collecting identical numbering in the trace gather of all cross arrangement domains
Unit, obtains common offset orientation angular domain trace gather altogether.
Specifically, the common orientation angular domain trace gather of common offset obtained according to the method described above, to be arranged positioned at cross
Exemplified by the common orientation angular domain trace gather of common offset for arranging domain trace gather center, what the prior art that compares was obtained is located at
The common orientation angular domain trace gather of the common offset at cross arrangement domain trace gather center, offset distance reduces one times.It is located at
Orientation angular domain trace gather compares the common offset orientation altogether of prior art acquisition altogether for the common offsets of other positions
The offset distance of angular domain trace gather, there is different degrees of reduction.
The method for the common orientation angular domain trace gather of acquisition common offset that the present embodiment is provided, by with cross arrangement
Centered on the trace gather center of domain, by perpendicular offset of shot line and seisline away from being carried out after halving to each cross arrangement domain trace gather
Divide and obtain common offset azimuth cells, then centered on the trace gather center of cross arrangement domain altogether, according to every
Azimuth cells merge into common offset orientation angular domain trace gather unit altogether to four adjacent common offsets altogether
Principle obtain common offset altogether orientation angular domain trace gather unit, and to common offset altogether orientation angular domain trace gather list
Member is numbered, and finally collects the common azimuth of common offset of identical numbering in the trace gather of all cross arrangement domains
Domain trace gather unit, obtains common offset orientation angular domain trace gather altogether, reduces each common offset azimuth altogether
The offset distance of domain trace gather, and then the offset distance scope of the common orientation angular domain trace gather of common offset is reduced, because
This reduces the discontinuity of offset distance distribution so that the offset distance transition between trace gather is smoother, and really
Having protected cross arrangement domain trace gather center has smallest offset away from having suppressed acquisition footprint, be more beneficial for shallow-layer
Imaging.
Below using a specific embodiment, the technical scheme to embodiment of the method shown in Fig. 1 is carried out in detail
Describe in detail bright.Carried out in the present embodiment using certain actual seismic data, wherein 300 meters of perpendicular offset of shot line, seisline
Away from 300 meters, degree of covering 196 (14 × 14) is secondary.
Illustrate a kind of existing method for obtaining the common orientation angular domain trace gather of common offset, figure with reference to Fig. 2 first
2 be the schematic diagram for the common orientation angular domain trace gather of common offset that existing method is obtained, as shown in Fig. 2 existing
Method is divided by perpendicular offset of shot line and seisline away from equidistant to cross arrangement domain trace gather, is had shown in Fig. 2
Square-rectangular element of 196 different colours, represents the common orientation angular domain trace gather of 196 common offsets to this
The subdivision of cross arrangement domain trace gather, the number of rectangular element is identical with degree of covering, and rectangular element is in length and breadth
To yardstick be respectively equal to perpendicular offset of shot line and seisline away from.The numbering of rectangular element is using a point side for quadrant processing
Respectively there are 49 inside formula, each quadrant, all from 1~49 serial number, 4 × 49=196=coverings time altogether
Number.As can be seen that the common orientation angular domain trace gather of minimum preceding 4 common offsets of offset distance (numbering is 1)
Around the center (big gun examines the intersection point of line) of cross arrangement, smallest offset is evenly distributed to this 4 away from trace gather
Common offset is altogether in orientation angular domain trace gather, and orientation angular domain trace gather is common around this four altogether for other common offsets
The common orientation angular domain trace gather of offset distance, deploys successively from small offset distance to large offseting distance.This division methods
Have the disadvantage for the common orientation angular domain trace gather of the common offset of near migration range, offset distance scope is often very big,
There is saltus step in the offset distance transition between the common orientation angular domain trace gather of common offset, be unfavorable for migration imaging.Under
Face combines the specific mistake that Fig. 3 illustrates the method for obtaining the common orientation angular domain trace gather of common offset that the present invention is provided
Journey.
Fig. 3 obtains the flow chart of the embodiment of the method two of the common orientation angular domain trace gather of common offset for the present invention,
As shown in figure 3, the method for the present embodiment can include：
S201, progress geological data preparation first.Including original earthquake data reading, geological data editor,
Observation system is loaded and time-domain is handled etc..
S202, geological data sorts into n × m cross arrangement domain trace gather, n is big gun line in observation system
Number, m be observation system in seisline number.
S203, by perpendicular offset of shot line, seisline away from original half is reduced into, i.e., new perpendicular offset of shot line is 300/2=150
Rice, new seisline is away from for 300/2=150 meters.With the perpendicular offset of shot line after halving, seisline away from going division ten
Word arrangement domain trace gather.Fig. 4 obtains the embodiment of the method two of the common orientation angular domain trace gather of common offset for the present invention
The middle schematic diagram divided after the trace gather of cross arrangement domain, as shown in figure 4, because perpendicular offset of shot line, seisline are away from each
Reduce one times, the number of obtained rectangular element will be 4 times of method shown in Fig. 2, i.e. 196 × 4=784.
S204, centered on the trace gather center of cross arrangement domain, according to every four adjacent common offsets altogether side
The principle that parallactic angle unit merges into the common orientation angular domain trace gather unit of a common offset obtains common offset side altogether
Parallactic angle domain trace gather unit, and orientation angular domain trace gather unit is numbered altogether to common offset.
Specifically, orientation angular domain trace gather-rectangular element is carried out 784 common offsets generated to S203 altogether
Merger and reorganization is handled, and will be total to azimuth cells near four common offsets at cross arrangement domain trace gather center
Common offset orientation angular domain trace gather unit altogether is merged into, with the common orientation angular domain trace gather unit of common offset
Centered on, respectively along the direction of big gun line and seisline, by every four common offsets, azimuth cells are closed altogether
And be the common orientation angular domain trace gather unit of a common offset, wherein, positioned at four sides of cross arrangement domain trace gather
Azimuth cells are four common offsets orientation angular domain trace gather unit altogether to four common offsets of boundary's point altogether, remaining
Under be located at cross arrangement domain trace gather four edges circle on common offset altogether orientation angular domain trace gather unit include two
The common azimuth cells of individual common offset.Thus the division knot of the common orientation angular domain trace gather unit of common offset is obtained
Really.Fig. 5 is common offset in present invention acquisition common offset altogether embodiment of the method two of orientation angular domain trace gather
The division result schematic diagram of common orientation angular domain trace gather unit, as shown in figure 5, obtaining 225 common offsets
Common orientation angular domain trace gather unit.Then to this 225 common offsets, orientation angular domain trace gather unit is compiled altogether
Number, can be that common offset at boundary point enters orientation angular domain trace gather unit successively in sequence altogether
Line number.Or can also be common offset at boundary point altogether orientation angular domain trace gather unit along
Big gun inspection line is numbered successively in sequence, and example as shown in Figure 5 is opened from the cross arrangement domain trace gather lower left corner
Beginning is counted as 1, increases successively along big gun inspection line.Why it is processed as, is because the common orientation of common offset
Angular domain trace gather unit have passed through big gun inspection line, rather than examine line along big gun.So, formation 225 is inclined altogether altogether
Move away from common orientation angular domain trace gather unit, seem more than theoretic 196 units, but it is noted that boundary
Only half unit, therefore complete unit or 196, are consistent with theory.
From figure 5 it can be seen that after reconfiguring, positioned at cross arrangement domain trace gather center have smallest offset away from,
Other units deploy as center convolution shape, while offset distance also gradually increases.
S205, the common orientation angular domain trace gather of common offset for collecting identical numbering in the trace gather of all cross arrangement domains
Unit, obtains common offset orientation angular domain trace gather altogether.
Fig. 6 is the offset distance model of the common orientation angular domain trace gather of common offset obtained using the method for the present invention
The offset distance scope contrast for enclosing the common orientation angular domain trace gather of common offset with being obtained using existing method is shown
It is intended to, (a) show the common orientation angular domain of common offset obtained using the method for the present invention in Fig. 6
(b) is shown the common offset obtained using existing method and is total in the offset distance scope of trace gather, Fig. 6
The offset distance scope of orientation angular domain trace gather, this two trace gathers both are from the smallest offset of respective splitting scheme
Away from that is, the former is located at the center of cross arrangement, and the latter is close to cross arrangement center.Existing method
Offset distance scope reaches 100~800 meters, and the method offset distance scope based on cross arrangement center
100~400 meters, reduce one times.
Fig. 7 is the common offset orientation angular domain trace gather progress altogether to being obtained using above-mentioned two kinds of division methods
(a) is shown to the method using the present invention in pre-stack time migration Contrast on effect schematic diagram, Fig. 7
Orientation angular domain trace gather is carried out in pre-stack time migration design sketch, Fig. 7 (b) obtained common offset altogether
Showing the common offset obtained using existing method, orientation angular domain trace gather carries out pre-stack time migration altogether
The continuity of the method shallow-layer lineups based on cross arrangement center is obtained substantially in design sketch, the present invention
Improvement, illustrate less offset distance scope mean offset distance distribution uniformity more preferably, more favorably
Handled in the imaging of shallow-layer and high-fidelity.
The present invention examines the division side that line-spacing halves centered on the intersection point of cross arrangement domain trace gather using big gun
Case and reconfiguration of cell technology, reduce the offset distance of the common orientation angular domain trace gather of each common offset, and then
So that the offset distance scope of the common orientation angular domain trace gather of common offset reduces, and it ensure that cross arrangement domain road
Collection center has smallest offset away from reducing the discontinuity of offset distance distribution, the skew between trace gather
It is smoother away from transition, solve conventional method presence offset distance scope is excessive, transition has saltus step etc.
Problem, it is all very with practical value for shallow-layer imaging, compacting acquisition footprint, high-fidelity processing.
The knot for the system embodiment one for obtaining the common orientation angular domain trace gather of common offset that Fig. 8 provides for the present invention
Structure schematic diagram, as shown in figure 8, the system of the present embodiment can include：Seismic data process module 11,
Division module 12, composite module 13 and acquisition module 14, wherein, seismic data process module 11 is used for
Geological data is sorted into n × m cross arrangement domain trace gather, n is the number of big gun line in observation system, m
For the number of seisline in observation system.Division module 12 is used for each cross arrangement domain trace gather, root
Seisline according to the perpendicular offset of shot line after halving and after halving obtains common offset azimuth is single altogether away from divide
Member.Composite module 13 is used for centered on the trace gather center of cross arrangement domain, adjacent inclined altogether according to every four
Move the principle for merging into the common orientation angular domain trace gather unit of a common offset away from common azimuth cells and obtain inclined altogether
Move away from common orientation angular domain trace gather unit, and orientation angular domain trace gather unit enters successively in order altogether to common offset
Line number.The common offset that acquisition module 14 is used to collect identical numbering in the trace gather of all cross arrangement domains is total to
Orientation angular domain trace gather unit, obtains common offset orientation angular domain trace gather altogether.
Further, division module 12 specifically for：
By near four common offsets at cross arrangement domain trace gather center, azimuth cells merge into one altogether
The common orientation angular domain trace gather unit of common offset, centered on the common offset altogether orientation angular domain trace gather unit,
Respectively along the direction of big gun line and seisline, by every four adjacent common offsets, azimuth cells merge altogether
Orientation angular domain trace gather unit is total to for a common offset, wherein, positioned at four borders of cross arrangement domain trace gather
Azimuth cells are four common offsets orientation angular domain trace gather unit altogether to four common offsets of point altogether, remaining
Be located at cross arrangement domain trace gather four edges circle on common offset altogether orientation angular domain trace gather unit include two
The common azimuth cells of common offset.
Optionally, division module 12 specifically for：From the common orientation angular domain trace gather of common offset at boundary point
Unit starts to be numbered successively in sequence.Optionally, division module 12 specifically for：From boundary point
Orientation angular domain trace gather unit starts to be numbered successively in sequence along big gun inspection line the common offset at place altogether.
The device of the present embodiment, can be used for the technical scheme for performing embodiment of the method shown in Fig. 1, in fact
Existing principle is similar, and here is omitted.
The system for the common orientation angular domain trace gather of acquisition common offset that the present embodiment is provided, by with cross arrangement
Centered on the trace gather center of domain, division module by perpendicular offset of shot line and seisline away from after halving to each cross arrangement domain
Trace gather, which divide, obtains common offset azimuth cells altogether, and composite module is again with the trace gather of cross arrangement domain
Centered on the heart, merge into a common offset according to the common azimuth cells of every four adjacent common offsets and be total to
The principle of orientation angular domain trace gather unit obtains common offset orientation angular domain trace gather unit, and to common offset altogether
Orientation angular domain trace gather unit is numbered altogether, and last acquisition module collects phase in the trace gather of all cross arrangement domains
With the common orientation angular domain trace gather unit of common offset of numbering, common offset orientation angular domain trace gather altogether is obtained, is subtracted
The offset distance of each small common offset orientation angular domain trace gather altogether, and then cause common offset orientation angular domain altogether
The offset distance scope of trace gather reduces, therefore reduces the discontinuity of offset distance distribution so that between trace gather
Offset distance transition it is smoother, and ensure that cross arrangement domain trace gather center have smallest offset away from, compacting
Acquisition footprint, is more beneficial for shallow-layer imaging.
One of ordinary skill in the art will appreciate that：Realize all or part of step of above-mentioned each method embodiment
Suddenly it can be completed by the related hardware of programmed instruction.Foregoing program can be stored in a computer can
Read in storage medium.The program upon execution, performs the step of including above-mentioned each method embodiment；And
Foregoing storage medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with store program codes
Medium.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than right
It is limited；Although the present invention is described in detail with reference to foregoing embodiments, this area it is common
Technical staff should be understood：It can still modify to the technical scheme described in foregoing embodiments,
Or equivalent substitution is carried out to which part or all technical characteristic；And these modifications or replacement, and
The essence of appropriate technical solution is not set to depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a kind of method for obtaining the common orientation angular domain trace gather of common offset, it is characterised in that including：
Geological data is sorted into n × m cross arrangement domain trace gather, n is the number of big gun line in observation system,
M is the number of seisline in observation system；
To each cross arrangement domain trace gather, seisline according to the perpendicular offset of shot line after halving and after halving is away from entering
Row, which is divided, obtains common offset azimuth cells altogether；
Centered on the trace gather center of cross arrangement domain, according to every four adjacent common offsets, azimuth is single altogether
The principle that member merges into the common orientation angular domain trace gather unit of a common offset obtains common offset orientation angular domain altogether
Trace gather unit, and orientation angular domain trace gather unit is numbered successively in order altogether to common offset；
The common orientation angular domain trace gather unit of common offset of identical numbering in the trace gather of all cross arrangement domains is collected,
Obtain common offset orientation angular domain trace gather altogether.
2. according to the method described in claim 1, it is characterised in that in the trace gather with cross arrangement domain
Centered on the heart, merge into a common offset according to the common azimuth cells of every four adjacent common offsets and be total to
The principle of orientation angular domain trace gather unit obtains common offset orientation angular domain trace gather unit altogether, including：
By near four common offsets at cross arrangement domain trace gather center, azimuth cells merge into one altogether
The common orientation angular domain trace gather unit of common offset, centered on the common offset altogether orientation angular domain trace gather unit,
Respectively along the direction of big gun line and seisline, by every four adjacent common offsets, azimuth cells merge altogether
Orientation angular domain trace gather unit is total to for a common offset, wherein, positioned at four borders of cross arrangement domain trace gather
Azimuth cells are four common offsets orientation angular domain trace gather unit altogether to four common offsets of point altogether, remaining
Be located at cross arrangement domain trace gather four edges circle on common offset altogether orientation angular domain trace gather unit include two
The common azimuth cells of common offset.
3. according to the method described in claim 1, it is characterised in that described to the common azimuth of common offset
Domain trace gather unit is numbered successively in order, including：
Compiled successively in sequence the common orientation angular domain trace gather unit of common offset at boundary point
Number.
4. according to the method described in claim 1, it is characterised in that described to the common azimuth of common offset
Domain trace gather unit is numbered successively in order, including：
Common offset at boundary point altogether orientation angular domain trace gather unit along big gun examine line in sequence according to
It is secondary to be numbered.
5. according to the method described in claim 1, it is characterised in that the common orientation angular domain of the common offset
The number of trace gather unit is equal with the degree of covering of the geological data.
6. a kind of system for obtaining the common orientation angular domain trace gather of common offset, it is characterised in that including：
Seismic data process module, for geological data to be sorted into n × m cross arrangement domain trace gather, n
For the number of big gun line in observation system, m is the number of seisline in observation system；
Division module, for each cross arrangement domain trace gather, according to the perpendicular offset of shot line after halving and halves
Seisline afterwards obtains common offset azimuth cells altogether away from division is carried out；
Composite module, it is adjacent inclined altogether according to every four for centered on the trace gather center of cross arrangement domain
Move the principle for merging into the common orientation angular domain trace gather unit of a common offset away from common azimuth cells and obtain inclined altogether
Move away from common orientation angular domain trace gather unit, and orientation angular domain trace gather unit enters successively in order altogether to common offset
Line number；
Acquisition module, the common orientation of common offset for collecting identical numbering in the trace gather of all cross arrangement domains
Angular domain trace gather unit, obtains common offset orientation angular domain trace gather altogether.
7. system according to claim 6, it is characterised in that the division module specifically for：
By near four common offsets at cross arrangement domain trace gather center, azimuth cells merge into one altogether
The common orientation angular domain trace gather unit of common offset, centered on the common offset altogether orientation angular domain trace gather unit,
Respectively along the direction of big gun line and seisline, by every four adjacent common offsets, azimuth cells merge altogether
Orientation angular domain trace gather unit is total to for a common offset, wherein, positioned at four borders of cross arrangement domain trace gather
Azimuth cells are four common offsets orientation angular domain trace gather unit altogether to four common offsets of point altogether, remaining
Be located at cross arrangement domain trace gather four edges circle on common offset altogether orientation angular domain trace gather unit include two
The common azimuth cells of common offset.
8. system according to claim 6, it is characterised in that the division module specifically for：
Compiled successively in sequence the common orientation angular domain trace gather unit of common offset at boundary point
Number.
9. system according to claim 6, it is characterised in that the division module specifically for：
Common offset at boundary point altogether orientation angular domain trace gather unit along big gun examine line in sequence according to
It is secondary to be numbered.
10. system according to claim 6, it is characterised in that the common azimuth of the common offset
The number of domain trace gather unit is equal with the degree of covering of the geological data.
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