CN108020860A - A kind of establishment method of the seismic survey lines of seismic observation system - Google Patents
A kind of establishment method of the seismic survey lines of seismic observation system Download PDFInfo
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- CN108020860A CN108020860A CN201711288355.5A CN201711288355A CN108020860A CN 108020860 A CN108020860 A CN 108020860A CN 201711288355 A CN201711288355 A CN 201711288355A CN 108020860 A CN108020860 A CN 108020860A
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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
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Abstract
The invention discloses the establishment method of the seismic survey lines of seismic observation system, is determining big gun line position perpendicular to the direction of lay of the land first, is once drawing common point substantially（CMP）Position and CMP bin sizes, it is reference point then to choose the curved flex point of big gun line, obtains shot point and receiving point coordinate position, and then obtains common point coordinate, finally obtains the specific location of survey line.Survey line position measurement of the present invention is accurate, so as to improve the resolution ratio and signal-to-noise ratio of seismic observation system test earthquake initial data, it is ensured that the accuracy of test.
Description
Technical field
The present invention relates to seismic observation system field, be specifically a kind of seismic survey lines of seismic observation system really cube
Method.
Background technology
At present, during seismic prospecting data collecting, high-resolution and the initial data of high s/n ratio are generally required, but
Influenced by field complicated landform, tend not to obtain preferable effect.Therefore the quality that observation system is established will directly affect
To the quality of final data collection, and then the precision of underground geologic bodies inversion imaging is influenced, this just needs well-designed one
Cover field layout.
The design philosophy of observation system is to be based on subsurface geological structure, earth's surface landform, execution conditions, ensures that survey line is linear
Distribution, big gun spacing and degree of covering are uniformly distributed.Need first to analyze the superficial landform, geologic body size, depth in known work area etc.
Geologic parameter, and then offset distance, track pitch, survey line length, line direction are proved, obtain accurate observation system ginseng
Number.
Traditional linear pattern observation system is larger by the earth's surface influence of topography, and difficult point generally is divided at 2 points, one is rising
Constructional difficulties caused by table of throwing oneself on the ground and later stage static correction problem, the second is excitation acceptable conditions are poor, once effective wave energy is weaker,
Bigger difficulty is brought to later data processing.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of establishment method of the seismic survey lines of seismic observation system, improves
The resolution ratio and signal-to-noise ratio of shake initial data.
The technical scheme is that：
A kind of establishment method of the seismic survey lines of seismic observation system, has specifically included following steps：
（1）, determine each shot position first, it is that the geodetic coordinates of the point is recorded with reference to shot point to choose big gun line corner position, then root
A CMP line is chosen according to terrain conditions situation, in this, as X-axis, wherein high order end is coordinate origin, then establishes Y according to X-axis
Axis, and record the geodetic coordinates of coordinate origin；
（2）, contrast with reference to shot point and X-axis, the relative position of Y-axis, two-dimensional coordinate will be converted into reference to the geodetic coordinates of shot point, i.e.,
Reference coordinate, then calculates the two-dimensional coordinate of each shot point along X-direction and Y-axis method to reference coordinate both sides；
（3）, assume CMP trace gathers be entirely located in CMP lines i.e. in X-axis, utilize step（2）Obtained shot point coordinate and the CMP assumed
The coordinate of each CMP in trace gather, is calculated the coordinate of the receiving point of each shot point；
（4）, by the reception point coordinates of known shot point coordinate and calculating, real CMP point coordinates is calculated, finally by real
CMP point coordinates determines the specific location of survey line.
The selection of the CMP lines in favor of focus triggering be standard, consider site contour can condition of construction with
Lay of the land factor, chooses CMP lines the most appropriate.
According to the coordinate and CMP lines of each CMP in the CMP trace gathers of the hypothesis, inverting is carried out to shot point and receiving point
Iterative calculation, so as to obtain accurate survey line position after carrying out the iterative calculation of inverting several times and correcting.
Advantages of the present invention：
The present invention is determining big gun line position perpendicular to the direction of lay of the land first, once draws common point substantially
（CMP）Position and CMP bin sizes, it is reference point then to choose the curved flex point of big gun line, obtains shot point and receives point coordinates
Position, and then common point coordinate is obtained, finally obtain the specific location of survey line.Survey line position measurement of the present invention is accurate, so that
Improve the resolution ratio and signal-to-noise ratio of seismic observation system test earthquake initial data, it is ensured that the accuracy of test.
Embodiment
The technical solution in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this area
Art personnel all other embodiments obtained without making creative work, belong to the model that the present invention protects
Enclose.
A kind of establishment method of the seismic survey lines of seismic observation system, has specifically included following steps：
（1）, determine each shot position first, it is that the geodetic coordinates of the point is recorded with reference to shot point to choose big gun line corner position, then root
A CMP line is chosen according to terrain conditions situation, in this, as X-axis, wherein high order end is coordinate origin, then establishes Y according to X-axis
Axis, and record the geodetic coordinates of coordinate origin；
（2）, contrast with reference to shot point and X-axis, the relative position of Y-axis, two-dimensional coordinate will be converted into reference to the geodetic coordinates of shot point, i.e.,
Reference coordinate, then calculates the two-dimensional coordinate of each shot point along X-direction and Y-axis method to reference coordinate both sides；
（3）, assume CMP trace gathers be entirely located in CMP lines i.e. in X-axis, utilize step（2）Obtained shot point coordinate and the CMP assumed
The coordinate of each CMP in trace gather, is calculated the coordinate of the receiving point of each shot point；
（4）, by the reception point coordinates of known shot point coordinate and calculating, real CMP point coordinates is calculated, finally by real
CMP point coordinates determines the specific location of survey line.
Wherein, so that focus triggering is standard, consider site contour can condition of construction and ground for the selection of CMP lines
Shape moves towards factor, chooses CMP lines the most appropriate.
The coordinate and CMP lines of each CMP in CMP trace gathers of the invention according to hypothesis, inverting is carried out to shot point and receiving point
Iterative calculation, so as to obtain accurate survey line position after carrying out the iterative calculation of inverting several times and correcting.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of changes, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (3)
- A kind of 1. establishment method of the seismic survey lines of seismic observation system, it is characterised in that：Following steps are specifically included：（1）, determine each shot position first, it is that the geodetic coordinates of the point is recorded with reference to shot point to choose big gun line corner position, then root A CMP line is chosen according to terrain conditions situation, in this, as X-axis, wherein high order end is coordinate origin, then establishes Y according to X-axis Axis, and record the geodetic coordinates of coordinate origin；（2）, contrast with reference to shot point and X-axis, the relative position of Y-axis, two-dimensional coordinate will be converted into reference to the geodetic coordinates of shot point, i.e., Reference coordinate, then calculates the two-dimensional coordinate of each shot point along X-direction and Y-axis method to reference coordinate both sides；（3）, assume CMP trace gathers be entirely located in CMP lines i.e. in X-axis, utilize step（2）Obtained shot point coordinate and the CMP assumed The coordinate of each CMP in trace gather, is calculated the coordinate of the receiving point of each shot point；（4）, by the reception point coordinates of known shot point coordinate and calculating, real CMP point coordinates is calculated, finally by real CMP point coordinates determines the specific location of survey line.
- A kind of 2. establishment method of the seismic survey lines of seismic observation system according to claim 1, it is characterised in that：It is described CMP lines selection in favor of focus triggering be standard, consider site contour can condition of construction and lay of the land factor, Choose CMP lines the most appropriate.
- A kind of 3. establishment method of the seismic survey lines of seismic observation system according to claim 1, it is characterised in that：According to The coordinate and CMP lines of each CMP in the CMP trace gathers of the hypothesis, inverting iterative calculation is carried out to shot point and receiving point, into So as to obtain accurate survey line position after the row iterative calculation amendment of inverting several times.
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| CN201711288355.5A CN108020860A (en) | 2017-12-07 | 2017-12-07 | A kind of establishment method of the seismic survey lines of seismic observation system |
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| CN201711288355.5A CN108020860A (en) | 2017-12-07 | 2017-12-07 | A kind of establishment method of the seismic survey lines of seismic observation system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778689A (en) * | 2011-05-13 | 2012-11-14 | 中国石油化工股份有限公司 | Wide curved line seismic data underground reflection line building method |
| CN103454680A (en) * | 2013-08-27 | 2013-12-18 | 中国石油集团川庆钻探工程有限公司地球物理勘探公司 | Method for calculating vertical coverage times of Walk-away VSP observing system |
| CN107290776A (en) * | 2016-03-30 | 2017-10-24 | 中国石油化工股份有限公司 | A kind of relief surface curved line design method centered on exciting |
-
2017
- 2017-12-07 CN CN201711288355.5A patent/CN108020860A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778689A (en) * | 2011-05-13 | 2012-11-14 | 中国石油化工股份有限公司 | Wide curved line seismic data underground reflection line building method |
| CN103454680A (en) * | 2013-08-27 | 2013-12-18 | 中国石油集团川庆钻探工程有限公司地球物理勘探公司 | Method for calculating vertical coverage times of Walk-away VSP observing system |
| CN107290776A (en) * | 2016-03-30 | 2017-10-24 | 中国石油化工股份有限公司 | A kind of relief surface curved line design method centered on exciting |
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Application publication date: 20180511 |