CN105277983A - Novel method for suppressing vibroseis slide scanning harmonic interference - Google Patents
Novel method for suppressing vibroseis slide scanning harmonic interference Download PDFInfo
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- CN105277983A CN105277983A CN201410295250.2A CN201410295250A CN105277983A CN 105277983 A CN105277983 A CN 105277983A CN 201410295250 A CN201410295250 A CN 201410295250A CN 105277983 A CN105277983 A CN 105277983A
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Abstract
The invention provides a novel method for suppressing vibroseis slide scanning harmonic interference. The novel method for suppressing vibroseis slide scanning harmonic interference comprises the following steps: the step 1) when carrying out slide scanning work in a vibroseis, embedding a detector near the vibroseis and recording vibration signals; the step 2) carrying out processing on the vibration signals recorded by the detector and obtaining preliminary waves; the step 3) carrying out convolution operation on the preliminary waves and reference signals, and carrying out calculating to obtain surface vibration signals; and the step 4) carrying out correlation calculation on the surface vibration signals and mother record to obtain slide scanning single-shot records. The novel method for suppressing the vibroseis slide scanning harmonic interference can obviously suppress slide scanning harmonic interference, is high in signal to noise ratio, has clearer reflection information, and can effectively improve signal to noise ratio of slide scanning seismic data.
Description
Technical field
The present invention relates to vibroseis seismic acquisition technology, specifically a kind of method utilizing the ground surface vibration information be recorded to apart from the wave detector at vibroseis closer location place to suppress the humorous wave interference of vibroseis slip scan.
Background technology
Current Seismic Exploration with Vibrator acquisition technique is the trend of land seismic exploration acquisition technique development, due to vibroseis, to have that frequency energy is controlled, safety and environmental protection, cost are low, operating efficiency is high etc. compared with explosive source a little many, so be more and more subject to pursuing of Ge great petroleum geophysics oil company.Slip scan is the important technology in current Seismic Exploration with Vibrator acquisition technique, owing to shortening the firing time of adjacent two big guns, the sliding time of two big guns is less than the sweep length time, shorten the engineering time, improve operating efficiency, but the impact thereupon brought is the harmonic wave interfering noise of adjacent two big guns, this harmonic noise interference is larger, on seismic data, there is important impact, reduce signal to noise ratio (S/N ratio).The rule of the humorous wave interference of slip scan is, the single big gun quality of harmonic wave on a upper big gun of next big gun has larger impact, and the single big gun quality influence of the harmonic wave of a upper big gun to next big gun is less.
For the humorous wave interference of the adjacent big gun how suppressed in slip scan process, numerous scholar proposes more method, has plenty of and utilizes force signal to suppress harmonic wave, has plenty of and utilizes the method for prediction harmonic wave to suppress harmonic wave.Through these methods above, the humorous wave interference of slip scan has certain suppression.
Summary of the invention
The object of this invention is to provide a kind of can the method for the humorous wave interference of novel suppressing controllable seismic-source slip scan of the humorous wave interference of suppressing controllable seismic-source slip scan.
Object of the present invention realizes by following technical measures: the method for the humorous wave interference of novel suppressing controllable seismic-source slip scan, the method of the humorous wave interference of this novel suppressing controllable seismic-source slip scan comprises: step 1, when vibroseis carries out slip scan work, embedding detector near vibroseis, record vibration signal; Step 2, processes the vibration signal of wave detector record, obtains primary wave; Step 3, carries out convolution operation by primary wave and reference signal, calculates ground vibration signal; And step 4, ground vibration signal and female record are carried out related operation, obtains slip scan single shot record.
Object of the present invention also realizes by following technical measures:
In step 1, wave detector is coupled with earth's surface, to record vibration signal.
In step 2, the vibration signal of wave detector record is carried out relevant to reference signal, in relevant record, only retain primary wave.
In step 3, the primary wave that employing remains and reference signal carry out convolution, calculate real ground vibration signal.
In step 4, ground vibration signal and female record are carried out related operation, and the formula obtaining slip scan single shot record is:
S (t) is ground vibration signal, and W (t) is the female record gathered, and X (t) is slip scan single shot record,
for correlation computations symbol.
The method of the humorous wave interference of novel suppressing controllable seismic-source slip scan in the present invention, the ground surface vibration information utilizing the wave detector at distance vibroseis closer location place to be recorded to is suppressed the humorous wave interference of vibroseis slip scan.Concrete principle is: the wave detector tracer signal adopting distance vibroseis nearer is as coherent signal, each signal record be each vibroseis vibration time real ground vibration signal, this signal contains scanning fundamental signal and harmonic signal, because each this ground surface vibration signal obtained not is identical, especially humorous wave interference, therefore the humorous wave interference in each this ground surface vibration signal obtained is poor with the harmonic wave interference correlation be adjacent in the single big gun of scanning, therefore adopt this ground surface vibration signal and female record carry out relevant, while the corresponding single shot record of acquisition, effectively can suppress other slip scan list big guns to the harmonic effects of this single big gun.The present invention is exactly according to this principle, the humorous wave interference of suppressing controllable seismic-source slip scan, and effect is better, effectively can improve the signal to noise ratio (S/N ratio) of slip scan seismic data.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of a specific embodiment of the method for the humorous wave interference of novel suppressing controllable seismic-source slip scan of the present invention;
Fig. 2 is the schematic diagram of the embedding wave detector in vibroseis closer location in a specific embodiment of the present invention;
Fig. 3 is the vibration signal waveform that in a specific embodiment of the present invention, wave detector is recorded to;
Fig. 4 is the vibration signal relative recording that obtains relevant to reference signal adopting wave detector to be recorded in a specific embodiment of the present invention;
Fig. 5 is the real ground vibration signal adopting the primary wave in Fig. 4 and reference signal to carry out convolution in a specific embodiment of the present invention to obtain;
Fig. 6 adopts the ground vibration signal that calculates record the relevant slip scan list big gun obtained to mother in a specific embodiment of the present invention, fixed gain that the relevant slip scan list big gun obtained carries out shows to adopt reference signal and mother to record to routine;
Fig. 7 adopts the ground vibration signal that calculates record the relevant slip scan list big gun obtained to mother in a specific embodiment of the present invention, AGC that the relevant slip scan list big gun obtained carries out shows to adopt reference signal and mother to record to routine;
Fig. 8 adopts the ground vibration signal that calculates record the relevant slip scan list big gun obtained to mother in a specific embodiment of the present invention, (30-60) Hz filtering that the relevant slip scan list big gun obtained carries out shows to adopt reference signal and mother to record to routine;
Fig. 9 adopts the ground vibration signal calculated to record the relevant slip scan list big gun obtained to mother in a specific embodiment of the present invention, adopt reference signal and female time frequency analysis recording the relevant slip scan list big gun obtained and carry out to routine.
Embodiment
For making above and other object of the present invention, feature and advantage can become apparent, cited below particularly go out preferred embodiment, and coordinate institute's accompanying drawings, be described in detail below.
As shown in Figure 1, Fig. 1 is the process flow diagram of the method for the humorous wave interference of novel suppressing controllable seismic-source slip scan of the present invention.
In step 101, when vibroseis carries out slip scan work, embedding detector near vibroseis, the vibration signal near record vibroseis.The method of described record ground vibration signal, needs, by good for the coupling effect on wave detector and earth's surface, to record vibration signal really to greatest extent.In one embodiment, at vibroseis 10 meters distance embedding detector, wave detector will be coupled better with earth's surface, is seated and buries reality.Fig. 2 is the schematic diagram of the embedding wave detector in vibroseis closer location in a specific embodiment of the present invention, and wave detector embedding requires to be coupled will to get well with earth's surface.Fig. 3 is the vibration signal waveform that in a specific embodiment of the present invention, wave detector is recorded to.Flow process enters into step 102.
In step 102, the vibration signal of wave detector record is processed, obtains primary wave.Particularly, the vibration information of wave detector record is carried out relevant to reference signal, in the record after being correlated with, only retain primary wave.Flow process enters into step 103.
In step 103, primary wave and reference signal are carried out convolution operation, when the signal after convolution calculates is exactly vibroseis shake plate vibrations, the vibration signal of the reality that earth's surface produces.Fig. 5 is the real ground vibration signal adopting the primary wave in Fig. 4 and reference signal to carry out convolution in a specific embodiment of the present invention to obtain.Flow process enters into step 104.
In step 104, ground vibration signal and female record are carried out related operation, obtains slip scan single shot record
S (t) is ground vibration signal, and W (t) is the female record gathered, and X (t) is slip scan single shot record,
for correlation computations symbol.
Fig. 6 adopts the ground vibration signal that calculates record the relevant slip scan list big gun obtained to mother in a specific embodiment of the present invention, fixed gain that the relevant slip scan list big gun obtained carries out shows to adopt reference signal and mother to record to routine; Fig. 7 adopts the ground vibration signal that calculates record the relevant slip scan list big gun obtained to mother in a specific embodiment of the present invention, AGC that the relevant slip scan list big gun obtained carries out shows to adopt reference signal and mother to record to routine; Fig. 8 adopts the ground vibration signal that calculates record the relevant slip scan list big gun obtained to mother in a specific embodiment of the present invention, (30-60) Hz filtering that the relevant slip scan list big gun obtained carries out shows to adopt reference signal and mother to record to routine; Fig. 9 adopts the ground vibration signal calculated to record the relevant slip scan list big gun obtained to mother in a specific embodiment of the present invention, adopt reference signal and female time frequency analysis recording the relevant slip scan list big gun obtained and carry out to routine.Contrast single big gun that this method obtains and single big gun quality that conventional correlation method obtains, the humorous wave interference of slip scan in new method list big gun obviously reduces, and the overall signal to noise ratio (S/N ratio) of single big gun is higher, and primary wave, reflective information are more clear, single big gun better quality.
Claims (5)
1. the method for the humorous wave interference of novel suppressing controllable seismic-source slip scan, is characterized in that, the method for the humorous wave interference of this novel suppressing controllable seismic-source slip scan comprises:
Step 1, when vibroseis carries out slip scan work, embedding detector near vibroseis, record vibration signal;
Step 2, processes the vibration signal of wave detector record, obtains primary wave;
Step 3, carries out convolution operation by primary wave and reference signal, calculates ground vibration signal; And
Step 4, carries out related operation by ground vibration signal and female record, obtains slip scan single shot record.
2. the method for the humorous wave interference of novel suppressing controllable seismic-source slip scan according to claim 1, is characterized in that, in step 1, be coupled by wave detector with earth's surface, to record vibration signal.
3. the method for the humorous wave interference of novel suppressing controllable seismic-source slip scan according to claim 1, is characterized in that, in step 2, carries out relevant by the vibration signal of wave detector record to reference signal, in relevant rear record, obtain primary wave.
4. the method for the humorous wave interference of novel suppressing controllable seismic-source slip scan according to claim 1, is characterized in that, in step 3, the primary wave that employing remains and reference signal carry out convolution, calculate real ground vibration signal.
5. the method for the humorous wave interference of novel suppressing controllable seismic-source slip scan according to claim 1, is characterized in that, in step 4, ground vibration signal and female record are carried out related operation, and the formula obtaining slip scan single shot record is:
S (t) is ground vibration signal, and W (t) is the female record gathered, and X (t) is slip scan single shot record,
for correlation computations symbol.
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Cited By (5)
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| CN105911590A (en) * | 2016-05-09 | 2016-08-31 | 刘宏杰 | Harmonic wave noise compacting processing method and device |
| CN109143330A (en) * | 2017-06-27 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of optimization controlled source obtains the method and system of single-shot quality |
| CN109581481A (en) * | 2019-01-09 | 2019-04-05 | 东华理工大学 | A kind of portable high frequency controlled source seismic signal harmonic wave interference removing method |
| CN109655893A (en) * | 2017-10-12 | 2019-04-19 | 中国石油化工股份有限公司 | A kind of the controlled source harmonic Elimination Method and system of waveform Adaptive matching |
| CN113050166A (en) * | 2019-12-27 | 2021-06-29 | 中国石油天然气集团有限公司 | Seismic excitation signal correction method and device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105911590A (en) * | 2016-05-09 | 2016-08-31 | 刘宏杰 | Harmonic wave noise compacting processing method and device |
| CN105911590B (en) * | 2016-05-09 | 2019-08-09 | 刘宏杰 | A kind of compression process method and device of harmonic noise |
| CN109143330A (en) * | 2017-06-27 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of optimization controlled source obtains the method and system of single-shot quality |
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| CN109655893A (en) * | 2017-10-12 | 2019-04-19 | 中国石油化工股份有限公司 | A kind of the controlled source harmonic Elimination Method and system of waveform Adaptive matching |
| CN109581481A (en) * | 2019-01-09 | 2019-04-05 | 东华理工大学 | A kind of portable high frequency controlled source seismic signal harmonic wave interference removing method |
| CN113050166A (en) * | 2019-12-27 | 2021-06-29 | 中国石油天然气集团有限公司 | Seismic excitation signal correction method and device |
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Effective date of registration: 20230105 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: SINOPEC Group Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC PETROLEUM ENGINEERING GEOPHYSICS Co.,Ltd. Patentee after: SHENGLI BRANCH OF SINOPEC PETROLEUM ENGINEERING GEOPHYSICS Co.,Ltd. Address before: 257086 No. 70 Qianjie Street, Niuzhuang Town, Dongying District, Dongying City, Shandong Province Patentee before: SHENGLI BRANCH OF SINOPEC PETROLEUM ENGINEERING GEOPHYSICS Co.,Ltd. |
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