CN1310040C - Correcting method and system for gun point or demodulator probe in earthquake prospection - Google Patents
Correcting method and system for gun point or demodulator probe in earthquake prospection Download PDFInfo
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- CN1310040C CN1310040C CNB2004100497186A CN200410049718A CN1310040C CN 1310040 C CN1310040 C CN 1310040C CN B2004100497186 A CNB2004100497186 A CN B2004100497186A CN 200410049718 A CN200410049718 A CN 200410049718A CN 1310040 C CN1310040 C CN 1310040C
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Abstract
The present invention relates to a prior period processing method of seismic data, particularly to an interactive position correction technique of an observation system for seismic exploration, which belongs to the seismic data processing field. The concrete scheme comprises the steps: using an observation system data file and a seismic channel data file as initial conditions to scan an observation system figure and a seismic channel figure; determining a shot point or a detection point required to be corrected according to a linear dynamic correction result; carrying out dynamic real-time correction to the position coordinate of the shot point or the detection point required to be corrected step by step until the linear dynamic correction precision reaches requirements; ending the correction process and outputting a corrected and modified observation system data file. The present invention effectively improves data processing correctness, enhances processing efficiency, and makes the whole technique reach the purposes of high efficiency and practicality in actual seismic exploration projects.
Description
Technical field:
The invention belongs to the seismic data process field, is a kind of earlier stage processing method of seismic data, relates in particular to a kind of recording geometry to seismic prospecting and carries out interactively position correction technology.
Background technology:
Method of seismic exploration, promptly each seismic event check point of arranging with mode according to certain rules receive by according to certain rules or mode arrange and move respectively blow out refraction wave and/or the reflection wave that a little excites the seismic event that is produced on the face of land, handle and analyze by time and waveform that the detected refraction wave that at the interface this seismic event is produced by each geology synthem and/or reflection wave are returned the face of land, so that can accurately understand and determine architectonic form and position, be a kind of the using always and effective method of in explorations such as oil and natural gas, instructing position, prospect drilling hole to dispose at present.Because underground each geology synthem is in the difference of the aspects such as degree of uniformity of composition and density, distribution, the seismic event velocity of propagation therein that a little excites generation of blowing out is corresponding also to have nothing in common with each other, and each check point is detected to be produced at the interface by each geology synthem and return also corresponding difference to some extent such as the time of the corresponding refraction wave on the face of land and/or reflection wave and waveform.
In seismic data was handled in earlier stage, especially for three-dimensional DATA PROCESSING, the correctness of recording geometry was to each follow-up treatment scheme and DATA PROCESSING quality important influence.Recording geometry in the so-called field of seismic exploration is meant the shot point and the relation of the mutual alignment between the acceptance point of seismic event.So the recording geometry description document is exactly the file of the such relation of record, they are used for determining that certain shot point (shot point) is relevant with which acceptance point (geophone station).A shot point is corresponding to a plurality of acceptance points in the seismic prospecting construction of reality, and a same acceptance point can receive the data that come from a plurality of shot points.Data acquisition from all correlation reception points of identical shot point is called common-shot-gather, and is called common receiving point gather for same acceptance point from the set of the data of different shot points.Because the difference in the geographic position of each point, for different acceptance points, the time that arrives from the signal of same shot point is different.And the data of engineering staff's needs are some data messages (being self excitation and self receiving) that excite same point to receive in concrete Data Processing.Therefore will inevitably exist a deviation at us between the data that get on the different acceptance points, we are referred to as normal moveout, need it is proofreaied and correct before processing.Such correction generally realizes than being easier to, but in concrete work progress, cause shot point in the recording geometry for various reasons, when there is deviation in the geophone station position, bigger error will appear in the correction of normal moveout, thereby should ring the processing of back, therefore need proofread and correct such position deviation.
On the other hand, some old data are in process again, because original recording geometry data may lose or damage, so need the recording geometry data are proofreaied and correct before DATA PROCESSING, to guarantee the correctness of Data Processing.Common way is to utilize the principle in linear moving school to proofread and correct simultaneously by artificial method.Concrete grammar is the engineering staff rule of thumb comes to determine may exist on which shot point the position in carrying out linear moving school a deviation, just utilize the description document of the mode of edit at the check point modification recording geometry of inferring, and then do the check of linear moving school and judge whether rationally, repeat such process until rationally.But in field of seismic exploration, because very huge of geological data, such bearing calibration is obviously wasted time and energy, and the result who proofreaies and correct often is not optimum, the effect that does not promptly reach.So not only speed is slow, efficient is low for the bearing calibration of recording geometry in the prior art, and is not easy to judge its correctness, globality.
Summary of the invention:
Slow at the method speed of proofreading and correct for the seismic prospecting recording geometry in the prior art, do not have that globality, accuracy rate can't guarantee, shortcoming such as not directly perceived, the present invention is mainly used to improve the correctness of Data Processing, the efficient that raising is handled, and makes whole technique reach efficient height, practical purpose in the seismic exploration project of reality.
Concrete technical scheme of the present invention is:
A kind of bearing calibration of shot point or geophone station in seismic prospecting, it is characterized in that: adopting recording geometry data and seismic channel data file is starting condition, scanning recording geometry figure and seismic trace figure, result according to the moving school of linearity judges and determines shot point or the geophone station that needs are proofreaied and correct, the shot point of required correction or the position coordinates of geophone station are progressively proofreaied and correct, reach requirement up to linear normal moveout correction precision, finish trimming process, the amended recording geometry data file of output calibration;
It may further comprise the steps:
A, input original document step: input recording geometry description document also scans the seismic channel data file;
(1) input recording geometry description document and surface of stratum speed;
(2) scanning seismic channel data file;
B, judgement and definite check point step: utilize the velocity sweeping geological data of input, on the seismic channel data image, need to determine the shot point of correction;
(1), picks the first arrival curve of each big gun data according to the earthquake data file;
(2) determining step a judges each first arrival slope of a curve;
(3) determine check point: if the first arrival curve is not parallel to ground, then to this first arrival curve right shot point give mark, institute's gauge point is needs the point proofreaied and correct;
C, aligning step:, the shot point or the geophone station of required correction are progressively proofreaied and correct according to the data file figure of input and scanning;
(1) set-up procedure: the shot point of on the recording geometry description document needs being proofreaied and correct is proofreaied and correct: the position coordinates of adjusting and reset shot point;
(2) linear moving school: carry out the moving school of linearity according to the new sp location information after proofreading and correct;
(3) determining step b: according to the parallel degree of the curve after recording geometry description document behind the moving school of linearity and the seismic channel data file judgement correction with the ground surface curve;
(4) repeating step:, otherwise finish the aligning step of this shot point if (1) then returned among the step C that do not meet the demands proofreaies and correct again;
D, determining step c: according to recording geometry description document and seismic channel data file, judge whether the shot point that all need proofread and correct has been carried out picking and aligning step: step B-C repeatedly not meets accuracy requirement until each shot point;
E, output step: the recording geometry description document of each shot point behind the output calibration and seismic channel data file.
Above bearing calibration is if the step of proofreading and correct at geophone station is consistent with the step of above-mentioned shot correction, just therein in the step of definite check point, trimming process and output calibration file operand all be transformed to the geophone station data file.
In above-mentioned process, described recording geometry is meant the shot point and the relation of the mutual alignment between the acceptance point of seismic event, the recording geometry description document is exactly the file of record above-mentioned relation, comprises the information of mutual relationship between the mark number of the establishing information of shot point or geophone station, concrete coordinate information and shot point, the geophone station in the file;
Described surface of stratum speed is a constant, measures by survey area, is designated as V;
Described seismic channel data is the information data that collects in the field of seismic exploration, usually with deposit data in boundary's matter such as for example tape, geological data is handled and exactly the earthquake image data to be carried out a series of processing;
A kind of graphic presentation of the time that the initialize signal that described first arrival curve is an acceptance point arrives.
Described first arrival slope of a curve: will show as straight line approx through the first arrival curve after the first arrival excision, we represent the first arrival slope of a curve with the slope of this straight line.
Described linearity is moved the school: according to the difference of the position of each acceptance point, the initialize signal of resulting data arrives and exists a deviation on the different acceptance point in geological data, be called normal moveout, but before the data processing of carrying out next step, need it is proofreaied and correct, step is that shot point is S, associated acceptance point is R (i) (i=1, n) wherein n represents the number of acceptance point, each acceptance point is D (i) (i=1 to the distance of shot point S, n), distance D (i) draws by the coordinate Calculation of shot point and geophone station.Base area indicated airspeed degree V tries to achieve the time of arrival (toa) T (i) of each acceptance point then, T (i)=D (i)/V (i=1,, n), and in the data of each acceptance point, deducting the data that this time T (i) has promptly obtained being equivalent to self excitation and self receiving, this process is linear moving school; Self excitation and self receiving is exactly the process that any excites same point to receive in the seismic prospecting;
In described trimming process, the point of in the recording geometry description document needs being proofreaied and correct carries out dynamic calibration, and the linear normal moveout correction result after will proofreading and correct compares observation in seismic channel data shows, promptly relatively proofread and correct moving school, back curve, be the parallel degree on lines that the correcting value in each road of same big gun data is linked to be and the face of land, if satisfy accuracy requirement, be that calibration curve is parallel with the face of land, then trimming process finishes, otherwise, further in recording geometry, this point is proofreaied and correct, until satisfying accuracy requirement.
The technical program also comprise a kind of in seismic prospecting the corrective system of shot point or geophone station, it is characterized in that: described system comprises:
A, input original document device: described device is used to import the recording geometry description document and scans the seismic channel data file; Described input original document device comprises:
(1) input recording geometry description document and surface of stratum speed device;
(2) scanning seismic channel data file device;
B, judgement and definite check point device: the velocity sweeping geological data that described judgment means utilizes input media to import, on the seismic channel data image, determine the shot point that need proofread and correct; Described judgement and definite check point device comprise:
(1) shows also pick device: be used for according to the earthquake data file, pick the device of the first arrival curve of each big gun data;
(2) judgment means a: the device that is used to judge each first arrival slope of a curve;
(3) labelling apparatus: be used for determining check point: if the first arrival curve is not parallel to ground, then the pairing shot point of this first arrival curve is given the device of mark, institute's gauge point is the point that needs correction;
C, means for correcting: described device is progressively proofreaied and correct the shot point or the geophone station of required correction according to the data file figure of input and scanning; Described correction comprises:
(1) adjusting gear: the shot point that is used on the recording geometry description document needs being proofreaied and correct is proofreaied and correct: the device of adjusting and reset the position coordinates of shot point;
(2) linear moving calibration device: the device that is used for carrying out linear moving school according to the new sp location information after proofreading and correct;
(3) the positive judgment means b of re-graduation: the device that is used for judging curve and the parallel degree of ground surface curve after proofreading and correct: be used for proofreading and correct again, otherwise finish the correction of this shot point as if (1) of then returning means for correcting that do not meet the demands according to the recording geometry description document behind the moving school of linearity and seismic channel data file;
D, pointwise correction device: described device control device B-C, be used for the shot point that recording geometry description document and seismic channel data file all need be proofreaied and correct is proofreaied and correct, meet the device of accuracy requirement until each shot point;
E, output unit: be used for the recording geometry description document of each shot point behind the output calibration and the device of seismic channel data file.
According to above technical scheme, by input and scanning recording geometry data file and seismic channel data file, can show two kinds of datagraphics respectively, the engineering staff can determine just that according to graphic file intuitively which shot point needs proofreaies and correct (by the effect in the moving school of linearity), after the point that needs are proofreaied and correct is determined, just can dynamically simulate the trimming process of shot point, (wherein the method in moving school as mentioned above to show the result who moves the school simultaneously in the demonstration of geological data in real time, this is because all data of change of shot point need recomputate), importantly we can observe the result of correction in real time in the process that shot point moves, so we can pick up optimum check point efficiently.Therefore, the present invention effectively improves the correctness of Data Processing, the efficient that raising is handled, and makes whole technique reach efficient height, practical purpose in the seismic exploration project of reality.
Description of drawings:
Fig. 1 is the realization flow block diagram of the inventive method technical scheme.
Fig. 2 is the synoptic diagram of system of the present invention;
Concrete embodiment:
One, input recording geometry description document and surface of stratum speed
As mentioned above, the recording geometry description document is to describe shot point and geophone station relative position in the recording geometry and the ASCII character file of mutual relationship between them, comprise following information in the file: the mark number of establishing of shot point, geophone station, concrete coordinate, and the relation between them.Can determine in the whole recording geometry how many shot points, how many geophone stations are arranged by reading in of these information, and their concrete coordinate and relation each other.We can represent with following meeting:
If
(wherein ns represents the number of shot point to S (i) for i=1, ns) the expression shot point mark number of establishing.
SX[I], SY[I] (I=1, ns) coordinate position of expression shot point
R[I] (wherein nr represents the number of geophone station for I=1, nr) the expression geophone station mark number of establishing.
RX[I], RY[I], RS[I] and (I=1 nr) represents the coordinate position of each geophone station and the shot point under its respectively.
In addition, surface of stratum speed is a constant, is measured by survey area, can be designated as V.
Two, scanning geological data and definite check point
The scanning geological data scans geological data (as top said shot point road collection data) exactly by certain mode (wavy line as geological data shows).Because geological data is very large, (big gun data are not very big usually for big gun data, as 240 roads are arranged, both 1 big gun was relevant with 240 geophone stations) or a few big gun data be simultaneously displayed in the window, the demonstration of following data is undertaken by the mode of page turning.Can allow the user carry out browsing of data easily like this.
Utilize the velocity sweeping geological data of input, on the seismic channel data image, need to determine the shot point of correction; According to the earthquake data file, pick the first arrival curve of each big gun data earlier; Judge each first arrival slope of a curve again; Determine check point then: if the first arrival curve is not parallel to ground, then the pairing shot point of this first arrival curve is given mark, institute's gauge point is the point that needs correction.We need add a mouse click event in the demonstration of data, can catch the identification number of the data of being clicked by its user, are used for determining that the sp location of which big gun needs to proofread and correct, and need both to determine the shot point mark number of the establishing S[k that proofreaies and correct].
Three, check point is proofreaied and correct
As check point S[k] determine after, we can determine which geophone station and S[k by the RS value in the geophone station data] relevant, we are designated as the geophone station of being correlated with:
R_Sel[I] (I=1, n) wherein n represents the number of the geophone station of being correlated with, their coordinate is used R_Sel_X[I respectively], R_Sel_Y[I] (I=1, n) expression.
In the number of establishing of definite check point mark, we are convenient to identification mode with a kind of user and demonstrate this point (as the mode with this color of change) in the graphical display window of recording geometry.Carry out the correction of this point then, concrete method is:
1, the some S[k that determine to need proofreaies and correct], and obtain S[k] coordinate SX[k], SY[k];
2, calculate this point and associated geophone station R_Sel[I respectively] (I=1, n) distance D [I] D[I]=SQRT ((R_Sel_X[I]-SX[k]) * (R_Sel_X[I]-SX[k])+(R_Sel_Y[I]-SY[k]) * (R_Sel_Y[I]-SYk)) (I=1, n) T[I and during their pairing walk] T[I]=D[I]/V (I=1, n)
3, T[I in the time of will belonging to the walking of each geophone station] (I=1, n) in geological data separately, deduct respectively (both with T[I] data point of expression show) as first data point in this road, and first data point of each geophone station laterally linked up with a broken line, and show with data in the display window of these big gun data.
4, judge the shown line and the parallel degree on the face of land, represent then that as the fundamental sum face of land is parallel the position of this shot point is reasonably, the correct operation of this point finishes, otherwise turns to next step.
5, adjust and change S[k] coordinate figure, and S[k after definite change in location] coordinate SX[k], SY[k], return the operation of the 2nd step.
Wherein, the first arrival curve is a kind of graphic presentation of time of arriving of the initialize signal of acceptance point.The first arrival of all acceptance points of general same big gun is drawn as a curve.The priority that arrives of each road signal as can be seen in this figure, after having carried out first arrival excision (being equivalent to become the data of self excitation and self receiving) on the per pass data, if the speed of using is correct, and the position of shot point and acceptance point also is correct in the recording geometry, so, the first arrival curve will show as straight line approx.
When the position correction of finishing check point, the coordinate of this point had also just been finished the position correction of this point after record changed.The user can be implemented in the dynamic change of calibration result in the shot point changes in coordinates process in this process, thereby determines best check point.And this is not allow readily accessible with manual synchronizing.Every correction once will be recomputated once the moving school of the linearity amount of all reference points in this process.The standard of proofreading and correct is exactly the compensation line flatness.
Four, the file behind the output calibration
After all shot points that will proofread and correct are all finished correction, the recording geometry data of description is recorded as file has again just finished output.Because all position datas in the system all are the data after proofreading and correct.
Claims (2)
1, a kind of bearing calibration of shot point or geophone station in seismic prospecting, it is characterized in that: adopting recording geometry data file and seismic channel data file is starting condition, scanning recording geometry figure and seismic trace figure, result according to the moving school of linearity judges and determines shot point or the geophone station that needs are proofreaied and correct, the shot point of required correction or the position coordinates of geophone station are progressively proofreaied and correct, reach requirement up to linear normal moveout correction precision, finish trimming process, the amended recording geometry data file of output calibration;
It may further comprise the steps:
A, input original document step: input recording geometry data file also scans the seismic channel data file;
(1) input recording geometry description document and surface of stratum speed: described recording geometry is meant the shot point and the relation of the mutual alignment between the acceptance point of seismic event, the recording geometry description document is exactly the file of record above-mentioned relation, comprises the information of mutual relationship between the mark number of the establishing information of shot point or geophone station, concrete coordinate information and shot point, the geophone station in the file;
(wherein ns represents the number of shot point to note S (i) for i=1, ns) the expression shot point mark number of establishing;
SX[I], SY[I] (I=1, ns) coordinate position of expression shot point;
R[I] (wherein nr represents the number of geophone station for I=1, nr) the expression geophone station mark number of establishing;
RX[I], RY[I], RS[I] and (I=1 nr) represents the coordinate position of each geophone station and the shot point under its respectively;
Described surface of stratum speed is a constant, measures by survey area, is designated as V;
(2) scanning seismic channel data file; Described seismic channel data is the information data that collects in the field of seismic exploration, usually with deposit data in boundary's matter such as for example tape, geological data is handled and exactly the earthquake image data to be carried out a series of processing;
B, judgement and definite check point step: utilize the surface of stratum velocity sweeping geological data of input, on the seismic channel data image, need to determine the shot point or the geophone station of correction;
(1), picks the first arrival curve of each shot point data or geophone station data according to the seismic channel data file; Described first arrival curve: a kind of graphic presentation of the time that the initialize signal of acceptance point arrives;
(2) determining step a: judge each first arrival slope of a curve; Described first arrival slope of a curve: will show as straight line through the first arrival curve after the first arrival excision, we represent the first arrival slope of a curve with the slope of this straight line;
(3) determine check point: if the first arrival curve is not parallel to ground, then pairing shot point of this first arrival curve or geophone station are given mark, institute's gauge point is the point that needs correction;
C, aligning step:, the shot point or the geophone station of required correction are progressively proofreaied and correct according to the data file figure of input and scanning;
(1) set-up procedure: shot point or the geophone station on the recording geometry description document needs proofreaied and correct are proofreaied and correct: the position coordinates of adjusting and reset shot point or geophone station; Need both to have determined the shot point mark number of the establishing S[k of correction];
(2) linear moving school: carry out the moving school of linearity according to new shot point after proofreading and correct or new geophone station positional information; Described linearity is moved the school: according to the difference of the position of each acceptance point, the initialize signal of resulting data arrives and exists a deviation on the different acceptance point in geological data, be called normal moveout, but before the data processing of carrying out next step, need it is proofreaied and correct, its step is S for establishing shot point, associated acceptance point is R (i) (i=1, n) wherein n represents the number of acceptance point, each acceptance point is D (i) (i=1 to the distance of shot point S, n), distance D (i) draws by the coordinate Calculation of shot point and geophone station.Base area indicated airspeed degree V tries to achieve the time of arrival (toa) T (i) of each acceptance point then, wherein T (i)=D (i)/V (i=1,, n), and in the data of each acceptance point, deducting the data that this time T (i) has promptly obtained being equivalent to self excitation and self receiving, this process is linear moving school; Self excitation and self receiving is exactly the process that any excites same point to receive in the seismic prospecting:
Promptly as check point S[k] determine after, we can determine which geophone station and S[k by the RS value in the geophone station data] relevant, we are designated as the geophone station of being correlated with:
R_Sel[I] (I=1, n) wherein n represents the number of the geophone station of being correlated with, their coordinate is used R_Sel_X[I respectively], R_Sel_Y[I] (I=1, n) expression;
In the number of establishing of definite check point mark, we are convenient to identification mode with a kind of user and demonstrate this point in the graphical display window of recording geometry; Carry out the correction of this point then, concrete method is:
I, the some S[k that determine to need proofreaies and correct], and obtain S[k] coordinate SX[k], SY[k];
Ii, calculate this point and associated geophone station R_Sel[I respectively] (I=1, distance D n) [I]
D[I]＝SQRT((R_Sel_X[I]-SX[k])* (R_Sel_X[I]-SX[k])
+(R_Sel_Y[I]-SY[k])*(R_Sel_Y[I]-SYk)) (I＝1，n)
And T[I during their pairing walk]
T[I]＝D[I]/V (I＝1，n)
Iii, T[I in the time of will belonging to the walking of each geophone station] (I=1, n) in geological data separately, deduct respectively (be about to T[I] data point of expression show) as first data point in this road, and first data point of each geophone station laterally linked up with a broken line, and show with data in the display window of these big gun data;
(3) determining step b: according to recording geometry description document and the seismic channel data file behind the moving school of linearity, the curve after judgement is proofreaied and correct and the parallel degree of ground surface curve: in described trimming process, the point of in the recording geometry description document needs being proofreaied and correct carries out dynamic calibration, and the linear normal moveout correction result after will proofreading and correct compares observation in seismic channel data shows, promptly relatively proofread and correct moving school, back curve, be the parallel degree on lines that the correcting value in each road of same big gun data is linked to be and the face of land, if satisfy accuracy requirement, be that calibration curve is parallel with the face of land, then trimming process finishes, otherwise, further in recording geometry, this point is proofreaied and correct, until satisfying accuracy requirement;
(4) repeating step:, otherwise finish the aligning step of this shot point or geophone station if (1) then returned among the step C that do not meet the demands proofreaies and correct again; Even meet the demands and then adjust and change S[k] coordinate figure, and S[k after definite change in location] coordinate SX[k], SY[k];
D, determining step c: according to recording geometry description document and seismic channel data file, judge whether shot point or the geophone station that all need proofread and correct have been carried out picking and aligning step: step B-C repeatedly not meets accuracy requirement until each shot point or each geophone station;
E, output step: each shot point behind the output calibration or the recording geometry description document of each geophone station and seismic channel data file.
2, a kind of system of in seismic prospecting, shot point or geophone station being proofreaied and correct, it is characterized in that: described system comprises:
A, input original document device: described device is used to import the recording geometry description document and scans the seismic channel data file; Described input original document device comprises:
(1) input recording geometry description document and surface of stratum speed device: described recording geometry is meant the shot point and the relation of the mutual alignment between the acceptance point of seismic event, described input recording geometry description document device is used to write down the file of above-mentioned relation, comprises the information of mutual relationship between the mark number of the establishing information of shot point or geophone station, concrete coordinate information and shot point, the geophone station in the file;
(wherein ns represents the number of shot point to note S (i) for i=1, ns) the expression shot point mark number of establishing;
SX[I], SY[I] (I=1, ns) coordinate position of expression shot point;
R[I] (wherein nr represents the number of geophone station for I=1, nr) the expression geophone station mark number of establishing;
RX[I], RY[I], RS[I] and (I=1 nr) represents the coordinate position of each geophone station and the shot point under its respectively;
Described surface of stratum speed device is used to import surface of stratum speed, and described surface of stratum speed is a constant, measures by survey area, is designated as V;
(2) scanning seismic channel data file device; Described scanning seismic channel data file device is used for the Information Monitoring data; Described seismic channel data is the information data that collects in the field of seismic exploration, usually with deposit data in boundary's matter such as for example tape, geological data is handled and exactly the earthquake image data to be carried out a series of processing;
B, judgement and definite check point device: the surface of stratum velocity sweeping geological data that described judgment means utilizes input media to import, on the seismic channel data image, determine shot point or the geophone station that need proofread and correct; Described judgement and definite check point device comprise:
(1) shows also pick device: be used for according to the earthquake data file, pick the device of the first arrival curve of each big gun data; Described first arrival curve: a kind of graphic presentation of the time that the initialize signal of acceptance point arrives;
(2) judgment means a: the device that is used to judge each first arrival slope of a curve; Described first arrival slope of a curve: will show as straight line through the first arrival curve after the first arrival excision, we represent the first arrival slope of a curve with the slope of this straight line;
(3) labelling apparatus: be used for determining check point: if the first arrival curve is not parallel to ground, then the pairing shot point of this first arrival curve or geophone station are given the device of mark, institute's gauge point is needs the point proofreaied and correct;
C, means for correcting: described device is progressively proofreaied and correct the shot point or the geophone station of required correction according to the data file figure of input and scanning; Described correction comprises:
(1) adjusting gear: be used on the recording geometry description document shot point or geophone station that needs are proofreaied and correct are proofreaied and correct: adjust and reset the position coordinates of shot point or geophone station, need both to determine the shot point or the geophone station mark number of the establishing S[k that proofread and correct] device;
(2) linear moving calibration device: be used for carrying out the linear device that moves the school according to new shot point after proofreading and correct or geophone station positional information; Described linearity is moved the school: according to the difference of the position of each acceptance point, the initialize signal of resulting data arrives and exists a deviation on the different acceptance point in geological data, be called normal moveout, but before the data processing of carrying out next step, need it is proofreaied and correct, its step is S for establishing shot point, associated acceptance point is R (i) (i=1, n) wherein n represents the number of acceptance point, each acceptance point is D (i) (i=1 to the distance of shot point S, n), distance D (i) draws by the coordinate Calculation of shot point and geophone station.Base area indicated airspeed degree V tries to achieve the time of arrival (toa) T (i) of each acceptance point then, wherein T (i)=D (i)/V (i=1,, n), and in the data of each acceptance point, deducting the data that this time T (i) has promptly obtained being equivalent to self excitation and self receiving, this process is linear moving school; Self excitation and self receiving is exactly the process that any excites same point to receive in the seismic prospecting:
Promptly as check point S[k] determine after, we can determine which geophone station and S[k by the RS value in the geophone station data] relevant, we are designated as the geophone station of being correlated with:
R_Sel[I] (I=1, n) wherein n represents the number of the geophone station of being correlated with, their coordinate is used R_Sel_X[I respectively], R_Sel_Y[I] (I=1, n) expression;
In the number of establishing of definite check point mark, we are convenient to identification mode with a kind of user and demonstrate this point in the graphical display window of recording geometry; Carry out the correction of this point then, concrete method is:
I, the some S[k that determine to need proofreaies and correct], and obtain S[k] coordinate SX[k], SY[k];
Ii, calculate this point and associated geophone station R_Sel[I respectively] (I=1, distance D n) [I]
D[I]＝SQRT((R_Sel_X[I]-SX[k])* (R_Sel_X[I]-SX[k])
+(R_Sel_Y[I]-SY[k])*(R_Sel_Y[I]-SYk)) (I＝1，n)
And T[I during their pairing walk]
T[I]＝D[I]/V (I＝1，n)
Iii, T[I in the time of will belonging to the walking of each geophone station] (I=1, n) in geological data separately, deduct respectively (be about to T[I] data point of expression show) as first data point in this road, and first data point of each geophone station laterally linked up with a broken line, and show with data in the display window of these big gun data;
(3) the positive judgment means b of re-graduation: be used for judging the device of curve and the parallel degree of ground surface curve after proofreading and correct and being used for proofreading and correct again as if (1) of then returning means for correcting that do not meet the demands according to the recording geometry description document behind the moving school of linearity and seismic channel data file, otherwise finish the device of the correction of this shot point: in described trimming process, the point of in the recording geometry description document needs being proofreaied and correct carries out dynamic calibration, and the linear normal moveout correction result after will proofreading and correct compares observation in seismic channel data shows, relatively proofread and correct moving school, back curve, be the parallel degree on lines that the correcting value in each road of same big gun data is linked to be and the face of land, if satisfy accuracy requirement, be that calibration curve is parallel with the face of land, then trimming process finishes, even meet the demands and then adjust and change S[k] coordinate figure, and S[k after definite change in location] coordinate SX[k], SY[k]; Otherwise, further in recording geometry, this point is proofreaied and correct, until satisfying accuracy requirement: proofread and correct again (1) then returned in the C means for correcting that even do not meet the demands, otherwise finish the aligning step of this shot point or geophone station;
D, pointwise correction device: described device control device B-C, be used for shot point or geophone station that recording geometry description document and seismic channel data file all need be proofreaied and correct are proofreaied and correct, meet the device of accuracy requirement until each shot point or geophone station;
E, output unit: be used for each shot point or the recording geometry description document of geophone station and the device of seismic channel data file behind the output calibration.
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| CN105717538B (en) * | 2014-12-02 | 2018-02-02 | 中国石油天然气股份有限公司 | Relief surface earthquake data offset reference plane conversion method and device |
| CN105137484B (en) * | 2015-08-28 | 2017-09-01 | 中国石油天然气集团公司 | The method and apparatus for estimating the center of geological data trace gather energy value |
| CN107843928A (en) * | 2016-09-21 | 2018-03-27 | 中国石油化工股份有限公司 | A kind of shot point method for correcting error based on grid-search algorithms |
| CN111435171B (en) * | 2019-01-15 | 2023-02-28 | 中国石油集团东方地球物理勘探有限责任公司 | Clock drift correction method and device for ocean bottom node seismic data and storage medium |
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| GB1432975A (en) * | 1973-04-09 | 1976-04-22 | ||
| US6058074A (en) * | 1998-07-31 | 2000-05-02 | Atlantic Richfield Company | Method and system for detecting hydrocarbon reservoirs using amplitude-versus-offset analysis with improved measurement of background statistics |
| CN1395114A (en) * | 2001-07-05 | 2003-02-05 | 中国石油天然气集团公司 | Three-D earthquake prediction and observation system restoring technology |
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| GB1432975A (en) * | 1973-04-09 | 1976-04-22 | ||
| US6058074A (en) * | 1998-07-31 | 2000-05-02 | Atlantic Richfield Company | Method and system for detecting hydrocarbon reservoirs using amplitude-versus-offset analysis with improved measurement of background statistics |
| CN1395114A (en) * | 2001-07-05 | 2003-02-05 | 中国石油天然气集团公司 | Three-D earthquake prediction and observation system restoring technology |
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