CN103777239B - A kind of phase place spinning solution improving different source data phase equalization - Google Patents
A kind of phase place spinning solution improving different source data phase equalization Download PDFInfo
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Abstract
The invention provides a kind of phase place spinning solution improving different source data phase equalization, belong to geophysical exploration data processing field.The inventive method includes: the first step, and all controlled source list big gun data are picked out, as controlled big gun data A；The explosive list big gun of the three-dimensional data relating to controlled source An Gong CMP road collection of releasing is sorted, obtains dynamite source CMP road collection B；CMP road these two parts of collection B of controlled big gun data A and dynamite source are directly carried out the mixing sorting superposition of common cmp territory, obtain the initial mixing superposition of two kinds of single big gun data by second step；Controlled big gun data A are carried out differential phase rotation and carry out respectively sorting stacked section corresponding after superposition is rotated each time with dynamite source CMP road collection B, then described stacked section carrying out screening and obtains the optimum anglec of rotation by the 3rd step.
Description
Technical field
The invention belongs to geophysical exploration data processing field, be specifically related to a kind of phase place spinning solution improving different source data phase equalization.
Background technology
It is the restriction for solving field construction condition that different focus combine construction, uses dynamite source to combine with controlled source construction, reaches the purpose of raising efficiency of construction.But due to the difference of focus, causing the phase place of reception data, energy all to there is the biggest difference with frequency and amplitude, the data making mixed source obtain is difficult to in-phase stacking, thus has a strong impact on resolution and the signal to noise ratio of data.The processing method used for different focus seismic datas the most both at home and abroad mainly has: adjust the methods based on wavelet matching such as deconvolution parametric method, matched filtering or series connection matching matrix；But when the use premise of these methods is to gather with the mixing of two kinds of focus: or have the single big gun of coupling, i.e. have the shot gather data that controlled source and dynamite source excite respectively in same shot position, it is simple to the relative analysis of two kinds of source data with mate；Choosing and take identical cmp section after dynamite source superposes respectively with controlled source and mate, data signal to noise ratio is required higher by this situation, and requires that dynamite source is relatively independent with the construction area of controlled source.But during different focus associating practice of construction, because some reason can random alternately be constructed or point type alternately construction, conventional explosives focus is difficult to use with single big gun matching process of controlled source；Cause between phase place, energy and the frequency of dynamite source and irregular point type controlled source data is widely different, how to match the data of dynamite source and 1 control focus list big gun in this case, is the most different source data matching treatment problem demanding prompt solutions.
Summary of the invention
It is an object of the invention to solve a difficult problem present in above-mentioned prior art, the phase place spinning solution of a kind of different source data phase equalization is provided, solution has dynamite source and controlled source mixed construction, and construction area is random alternately, when data signal to noise ratio is low, causing seismic data Sensor gain and phase perturbations problem during puzzlement distinct methods construction, improve mixing focus and process the concordance of achievement, raising processes quality of achievement
The present invention is achieved by the following technical solutions:
The phase place spinning solution of a kind of different source data phase equalization, comprises the following steps:
The first step, picks out, all controlled source list big gun data as controlled big gun data A；The explosive list big gun of the three-dimensional data relating to controlled source An Gong CMP road collection of releasing is sorted, obtains dynamite source CMP road collection B；
CMP road these two parts of collection B of controlled big gun data A and dynamite source are directly carried out the mixing sorting superposition of common cmp territory, obtain the initial mixing superposition of two kinds of single big gun data by second step；
Controlled big gun data A are carried out differential phase rotation and carry out respectively sorting stacked section corresponding after superposition is rotated each time with dynamite source CMP road collection B, then described stacked section carrying out screening and obtains the optimum anglec of rotation by the 3rd step.
Described 3rd step comprises the following steps:
(31): controlled big gun data A from 0-360 degree, differential phase rotation is carried out with 10 for increment, then carry out respectively sorting stacked section stki corresponding after superposition is rotated each time with dynamite source CMP road collection B by rotating data Ai obtained each time, again each stacked section stki obtained is carried out Contrast on effect respectively, preferably go out the section that Overlay is good；I=0,10,20 to 360；
(32): section good for described Overlay is superposed with described initial mixing and well control data carries out effectiveness comparison；
(33): within being adjusted to 3ms using the phase place time difference, signal to noise ratio improves 20% before relatively adjusting, the other seismic data of well and well synthetic seismogram coincide the rate crucial governing factor chosen as the phase matched anglec of rotation higher than 80%, and the angle reaching this governing factor is the striked optimum anglec of rotation.
Compared with prior art, the invention has the beneficial effects as follows: by the process of the fine flow process of foregoing invention, can carry out mating consistency treatment to irregular point type controlled source data and the dynamite source data in low signal-to-noise ratio district with general seismic processing software, it is good that acquisition has phase equalization, the most real seismic profile.
Accompanying drawing explanation
Fig. 1 is the step block diagram that the present invention improves the phase place spinning solution of different source data phase equalization.
Fig. 2-1a is energy and the frequency of the dynamite source after concordance energy compensating and concordance frequency processing.
Fig. 2-1b is energy and the frequency of the controlled source list big gun after concordance energy compensating and concordance frequency processing.
Fig. 2-2 is that controlled source carries out the stacked section after phase place rotates 10 degree.
Fig. 2-3 is that controlled source carries out the stacked section after phase place rotates 30 degree.
Fig. 2-4 is that controlled source carries out the stacked section after phase place rotates 60 degree.
Fig. 2-5a is simple dynamite source stacked section.
Fig. 2-5b is the stacked section that dynamite source mixes with controlled source.
Fig. 2-5c is the process of the phase equalization utilizing traditional wavelet matching method to carry out.
Fig. 2-5d is the stacked section utilizing the inventive method phase place to rotate after contrasting selected parameter.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail:
Owing to controlled source big gun number is few, construction area is not fixed, mode is blown out for point type, often bundle data simply meets with in dynamite source construction and just carry out controlled source at obstacle, therefore controlled source amount is few, the controlled source superposition of Dan Shu is difficult to find that reliable lineups, therefore, the present invention proposes single big gun of two kinds of source datas by carrying out energy, frequency invariance separately, controlled source data list big gun is released when an overall single big gun, the phase equalization dividing three steps to realize two kinds of source datas processes, as shown in Figure 1:
The first step, picks out all controlled source list big gun data, as controlled big gun data A the three-dimensional data of controlled source (the controlled source list big gun data be exactly)；The three-dimensional data relating to controlled source, (the original class's report data blown out can indicate the mode of blowing out, understanding whether relate to controlled source from the mode of blowing out) dynamite source big gun collection is released (the most not including controlled source) and An Gong CMP road collection carries out sorting and (i.e. the three-dimensional data relating to controlled source released, then remaining three-dimensional data is sorted by CMP road collection), obtain dynamite source CMP road collection B (i.e. dynamite source data B in Fig. 1)；
Second step, directly controlled big gun data A and dynamite source CMP road these two parts of collection B are carried out the mixing sorting superposition of common cmp territory, obtains the initial mixing superposition (two kinds of single big gun data herein refer to what dynamite source and controlled source unmatched processed mixed data) of two kinds of single big gun data；
Controlled big gun data A are carried out differential phase rotation and carry out respectively sorting stacked section corresponding after superposition is rotated each time with dynamite source CMP road collection B, then described stacked section carrying out screening and obtains the optimum anglec of rotation by the 3rd step.
Described 3rd step comprises the following steps:
(31): controlled big gun data A from 0-360 degree (0,10,20, ..., 360), carry out differential phase rotation with 10 for increment, by rotate each time obtain data Ai (i=0,10,20, ..., 360) carry out respectively sorting superposing with dynamite source CMP road collection B, stacked section stki corresponding after being rotated each time, (i=0,10,20, ..., 360).It is to say, all unified with the dynamite source data sorting of the most postrotational data, and superposition.Rotate how many times, how many superpositions are obtained with regard to correspondence.In practical operation, rotating with big augmental interval at the beginning, gradually lock onto target refines increment again in target area, to reduce workload.By obtain each stacked section stki (0,10,20 ..., 360) carry out Contrast on effect respectively and obtain the section that the section of superposition the most in the same direction, i.e. Overlay are good；
(32): section good for described Overlay is superposed with described initial mixing and well control data (the real well data obtained by well-digging in early days in work area) carries out effectiveness comparison；
(33): within being adjusted to 3ms with the phase place time difference, signal to noise ratio relatively adjust before initial mixing superposition improve 20%, (if within the phase place time difference is adjusted to 3 to 5ms, the superposition so obtained can be superposition in the same direction, data signal to noise ratio can increase, otherwise, data superposition signal to noise ratio can reduce,) the other seismic data of well and well synthetic seismogram rate of coincideing is higher than the 80% crucial governing factor chosen as the phase matched anglec of rotation, the angle reaching this governing factor is the anglec of rotation asked for.
Whether relatively section layer position coincide with actual well control data, well synthetic seismogram can be generated, so verify through postrotational data the most true and reliable and be not only that signal to noise ratio increases, finally adjusting the most perfect with the phase place time difference, signal to noise ratio relatively preferably and is coincide the preferable anglec of rotation key parameter chosen as phase matched with well control data.
Data signal to noise ratio increases and well control data is coincide, and detail file has carried out effective superposition the most in the same direction true and reliable, namely eliminates the phase difference of two kinds of focus, also demonstrates that this anglec of rotation obtained is suitable simultaneously.Vertical thin route in Fig. 2-5b and Fig. 2-5c was well line, and little horizontal line is the layer position demarcated, it can be seen that the layer position of section coincide very well with well data layer position, here it is the identical judgement of well control data.Can be realized by traditional linkage QC contrast it addition, each stacked section is compared.
Fig. 2-1a and Fig. 2-1b is the dynamite source after concordance energy compensating and concordance frequency processing and the difference of energy and frequency between controlled source list big gun, and these solve the most substantially by existing method.The key issue of lower step is exactly the process of phase equalization, the i.e. key aspect of the present invention.
Fig. 2-2, Fig. 2-3 and Fig. 2-4 for controlled source is carried out in phase place rotary course, along with i (10 ... 30 ... 60 ...) the postrotational stacked section of part of the change correspondence of increment of rotation.
Fig. 2-5a is simple dynamite source stacked section, and Fig. 2-5b is dynamite source and controlled source mixes stacked section, after the vertical line in figure represents and points out that controlled source data is come in, it will be apparent that the phase place time difference staggers a little, just as vertical fault.From Fig. 2-5a it can be seen that the big gun number that relates to of controlled source is little, if but do not utilize controlled source data, section exists obvious breach, it is poor to there is obvious phase time in mixing superposition simple seen from Fig. 2-5b.
Fig. 2-5c is the process of the phase equalization utilizing traditional wavelet matching method to carry out, oval circle in figure represents after tradition matching process, although the phase place time difference makes moderate progress as the most disconnected, the binding site phase equalization of two kinds of data of oval circle position makes moderate progress, but is not fully solved.From section it can be seen that owing to stitching portion controlled source data few (indentation, there) is difficult to find the lineups of coupling, cause the inadaptable of method, matching effect is the most bad.
Fig. 2-5d is the stacked section that phase place rotates after contrasting selected parameter, and the oval circle in figure represents after the inventive method, and the phase place time difference of data solves very well, and the binding site layer bit integrity of two kinds of data of oval circle position is fine.It can be seen that after by coupling, it is fine that phase equalization solves, obvious phase contrast is not had on section, after coupling, relate at the data of controlled source, mixing STACK DATA signal to noise ratio and be the most also improved, it is seen that accomplished the overall in-phase stacking of data.
Illustrate by an embodiment below.In certain work area, city-building develops rapidly, villages and small towns, ground, road, fish pond, electrical network etc. blazon, and causing can not single explosive shooting, it is necessary to take to mix epicenter excitation, and block top layer is sandy soil or drift sand formation, widely drift sand development area is distributed, and excitation energy is weak, and data quality is poor；Locally shooting-receiving condition change in Paleochannel region is extremely violent, and excitation wavelet is unstable, and in destination layer, Paleozoic group stratum is affected by tectonic movement etc., stratum deformation is serious, structure is broken, fault development, and ground interlayer difference of impedance is different little, it is difficult to be formed and shakes reflection strongly, deep seismic features as poor geologic condition；Causing causing between big gun record that capacity volume variance is big, noise distribution is wide, noise energy is strong, data poor signal to noise.Conventional mixing focus treatment technology is difficult to meet the technical need of exploration and development；And utilize patent of the present invention to preferably resolve mixing source data amplitude, phase and frequency problem of inconsistency.
The whole district constructs 70 bundle data altogether, and during construction, ground obstacle is many, villages and small towns, highway, river, and wherein 55-70 bundle (accompanying drawing) is when meeting with cities and towns, it is impossible to uses explosive to blow out, have employed part random point type controlled source.Seismic geological codition and the feature in field work work area in understanding work area, the i.e. distribution of controlled source, after the quality of data, use the technological treatment of patent flow process, effectively match dynamite source and controlled source difference in energy, frequency, phase place.By the section after processing, at well point, synthetic seismogram and seismic profile time relationship, wave character coincidence rate are more than 90%, during processing profiles, deep error is less than specification index, structural configuration is clear, signal to noise ratio have also been obtained effective raising, and process out the Seismic data of high-resolution, high-fidelity, high noise, i.e. reach the seismic profile of " three-hypers one is accurate "；Than more clearly reflecting structure and variation of lithological feature, this district N6 Yu N5# submitted to according to this process achievement all obtains industrial production capacity it was confirmed the dependable with function of this processing method.
Table 1 relates to controlled source and mixes 15 data that focus is blown out with dynamite source, and data is restrainted by the whole district 70:
| Shu Hao | Total big gun number | Controlled source big gun |
| Sw56 | 1-387 | 185-221 |
| Sw57 | 1-427 | 155-197 |
| Sw58 | 1-371 | 161-198 |
| Sw59 | 1-312 | 149-180 |
| Sw60 | 1-347 | 192-228 |
| Sw61 | 1-309 | 209-228 156-193 |
| Sw62 | 1-319 | 155-186 |
| Sw63 | 1-318 | 155-195 |
| Sw64 | 1-325 | 156-194 |
| Sw65 | 1-342 | 162-196 |
| Sw66 | 1-334 | 155-174 |
| Sw67 | 1-348 | 155-184 |
| Sw68 | 1-352 | 155-184 |
| Sw69 | 1-376 | 180-204 |
| Sw70 | 1-379 | 174-192 |
Table 1
The object of the invention solves when dynamite source is with controlled source mixed construction, causes seismic data phase place inconsistence problems during puzzlement distinct methods construction；Three-step approach phase equalization processing method is proposed for Sensor gain and phase perturbations problem novelty；By the actual application in zones of different, significantly improving mixing focus and process the concordance of achievement, improve process quality of achievement, actual well drilled result also demonstrate that this invention effectiveness and practicality
Technique scheme is one embodiment of the present invention, for those skilled in the art, on the basis of the invention discloses application process and principle, it is easy to make various types of improvement or deformation, it is not limited solely to the method described by the above-mentioned detailed description of the invention of the present invention, the most previously described mode is the most preferred, and the most restrictive meaning.
Claims (1)
1. the phase place spinning solution improving different source data phase equalization, it is characterised in that: said method comprising the steps of:
The first step, picks out, all controlled source list big gun data as controlled big gun data A；The explosive list big gun of the three-dimensional data relating to controlled source is released and sorts by CMP road collection, obtain dynamite source CMP road collection B；
CMP road these two parts of collection B of controlled big gun data A and dynamite source are directly carried out the mixing sorting superposition of common cmp territory, obtain the initial mixing superposition of two kinds of single big gun data by second step；
Controlled big gun data A are carried out differential phase rotation and carry out respectively sorting stacked section corresponding after superposition is rotated each time with dynamite source CMP road collection B, then described stacked section carrying out screening and obtains the optimum anglec of rotation by the 3rd step；Wherein,
Described 3rd step comprises the following steps:
(31): controlled big gun data A from 0-360 degree, differential phase rotation is carried out with 10 degree for increment, then carry out respectively sorting stacked section stki corresponding after superposition is rotated each time with dynamite source CMP road collection B by rotating data Ai obtained each time, again each stacked section stki obtained is carried out Contrast on effect respectively, preferably go out the section that Overlay is good；I=0,10,20 to 360；
(32): section good for described Overlay is superposed with described initial mixing and well control data carries out effectiveness comparison；
(33): within being adjusted to 3ms using the phase place time difference, signal to noise ratio improves 20% before relatively adjusting, the other seismic data of well and well synthetic seismogram coincide the rate crucial governing factor chosen as the phase matched anglec of rotation higher than 80%, and the angle reaching this governing factor is the striked optimum anglec of rotation；
Whether relatively section layer position coincide with actual well control data, well synthetic seismogram can be generated, so verify through postrotational data the most true and reliable and be not only that signal to noise ratio increases, finally adjusting the most perfect with the phase place time difference, signal to noise ratio relatively preferably and is coincide the preferable anglec of rotation key parameter chosen as phase matched with well control data.
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