CN105093275B - Useful signal based on rate pattern extracts ISS wave field separation methods - Google Patents
Useful signal based on rate pattern extracts ISS wave field separation methods Download PDFInfo
- Publication number
- CN105093275B CN105093275B CN201410195660.XA CN201410195660A CN105093275B CN 105093275 B CN105093275 B CN 105093275B CN 201410195660 A CN201410195660 A CN 201410195660A CN 105093275 B CN105093275 B CN 105093275B
- Authority
- CN
- China
- Prior art keywords
- data
- wave field
- useful signal
- signal
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
ISS wave field separation methods are extracted the invention provides a kind of useful signal based on rate pattern, belong to oil gas (energy) Exploration Domain.This method includes：(1) CDP trace gathers are generated：The data of many focus simultaneous shots are converted into common CDP trace gathers data；(2) speed spectrum analysis and t0Time picks up：Normal-moveout spectrum is done to the common CDP trace gathers data, and analysis is interacted to normal-moveout spectrum, the t of each reflecting layer position is tentatively picked up0Time；(3) the effective continuous signal of pickup is followed the trail of, useful signal is obtained：(4) other noise signals are removed：It will not be that other all information of useful signal regard noise as, and these noises directly subtracted from seismic channel data, there is no the signal for interfering big gun noise obtained from；(5) seismic channel data inverse transformation：Inverse transformation is carried out to the common CDP trace gathers data after step (4) processing, the shot gather data body after wave field separation is obtained.
Description
Technical field
The invention belongs to oil gas (energy) Exploration Domain, and in particular to a kind of useful signal based on rate pattern is extracted
ISS wave field separation methods, the early stage for many focus simultaneous shots (controlled source synchronous scanning) seismic data in oil-gas exploration
Processing.
Background technology
Many focus simultaneous shot seismic acquisition technologies are a kind of efficient seismic data acquisition technologies.It can be using routinely
Shake data collection technology and gather time of a big gun data and gather two big guns or many big gun data, therefore can greatly improve collecting efficiency,
Reduce acquisition cost.Seismic acquisition technology can be divided into a variety of, and independent synchronization scanning technique (ISS) is wherein efficiency highest
Acquisition technique.But because the same time there are multiple focus exciting, cause wave field in earthquake record to interfere, data processing is
One difficult point of the technology.
The treatment technology route for many vibroseis acquisition seismic datas that different methods is gathered is each variant, and ISS is provided
The processing of material mainly has two technology paths, and one, be according to the characteristics of many focus seismic datas, to develop special data processing skill
Art；2nd, it is to use wave field separation technology, many focus seismic datas is separated into single focus seismic data, then using existing
Common seismic data treatment technology is handled.Need to develop a series of technology for former approach, at present still in grinding
Study carefully the stage.Many focus seism processings at this stage mainly use later approach.
Wave field separation for ISS data is mainly randomness according to simultaneous shot focus on firing time, by ground
Shake data are transformed in non-big gun trace gather (for example：Common midpoint gather, common offset trace gather or common detector gather etc.), now,
Useful signal shows as being relevant, and interferes big gun noise to be random, using this species diversity, is made an uproar at random using various removals
The method of sound can just eliminate interference big gun noise, so as to reach the effect of wave field separation.But the various sides for removing random noise
Method all has the damage to useful signal, and this damage is often very fatal for lithology and reservoir exploration.
In order to avoid this damage, when selecting denoising parameter, often more from protection useful signal so that noise is filtered
Effect is undesirable, ultimately results in wave field separation undesirable.And how to realize many focus seismic datas high-purity separation be realize
The key of its data high accuracy imaging.
The content of the invention
It is an object of the invention to solve problem present in above-mentioned prior art, there is provided a kind of having based on rate pattern
Signal extraction ISS wave field separation methods are imitated, the high-purity separation to many focus seismic datas of ISS is realized, so that existing to utilize
Common seismic data treatment technology the high Precision Processing of many focus seismic datas such as ISS is laid the foundation.
The present invention is achieved by the following technical solutions：
A kind of useful signal based on rate pattern extracts ISS wave field separation methods, including：
(1) CDP trace gathers are generated：The data of many focus simultaneous shots are converted into common CDP trace gathers data；
(2) speed spectrum analysis and t0Time picks up：The common CDP trace gathers data are done with normal-moveout spectrum, and normal-moveout spectrum is carried out
Interaction analysis, tentatively picks up the t of each reflecting layer position0Time；
(3) the effective continuous signal of pickup is followed the trail of, useful signal is obtained：
(4) other noise signals are removed：To not be that other all information of useful signal regard noise as, and from seismic channel number
These noises are directly subtracted in, do not have the signal (signal that namely we need) for interfering big gun noise obtained from；
(5) seismic channel data inverse transformation：Inverse transformation is carried out to the common CDP trace gathers data after step (4) processing, obtained
Shot gather data body after wave field separation.
What the step (3) was realized in：
According to t0Time opens a hour window, using the uniformity in zero-offset road and its neighbouring a few road signals, using phase
Algorithm is closed, the time corresponding to zero-offset road peak swing is calculated in hour window, and as the t of modification0Time, then
According to the uniformity of useful signal, using related algorithm calculate the maximum data of adjacent track data zero-offset road correlation with
The time difference tn in zero-offset road, and by its t with modification0Time is added, so as to obtain the travelling of adjacent one of reflected signal
When, the reflected signal of the seismic channel is thus obtained, by that analogy, the reflected signal of each seismic channel is obtained.
In above-mentioned steps, step (2) speed spectrum analysis and t0In time pickup, it is desirable to take t0Time, just it is necessary to have speed
Model is spent, and rate pattern is obtained by speed spectrum analysis, it can be seen that the present invention is the wave field separation based on rate pattern
Method.
Compared with prior art, the beneficial effects of the invention are as follows：This method is used to gather the ISS that 2D and 3D is simulated and provided
Material carries out wave field separation and achieves ideal effect, while this Weak Signal Extraction is when certain in window,
Only it is tracked according to the continuity of useful signal, and to the feature of noise signal without being distinctly claimed, therefore this method is not only
Suitable for the wave field separation to ISS data, for other kinds of highly effective gathering seismic data (such as：D4S wave field separation)
It is effective.
Brief description of the drawings
Fig. 1 is the step block diagram of the inventive method.
Fig. 2-1 is the big gun record before 2D simulation ISS data wave field separations, and interference big gun noise is developed very much.
Fig. 2-2 is the big gun record after 2D simulation ISS data wave field separations, and interference big gun noise is substantially eliminated.
Fig. 3-1 is the big gun record before 3D simulation ISS data wave field separations, and interference big gun noise is developed very much.
Fig. 3-2 is the big gun record after 3D simulation ISS data wave field separations, and interference big gun noise is substantially eliminated.
Fig. 4-1 is the big gun record before field D4S collection data wave field separations, well-regulated interference big gun noise.
Fig. 4-2 is the big gun record after field D4S collection data wave field separations, and interference big gun noise is substantially eliminated.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
In the denoising of seismic data, the denoising of special low SNR data is a technological difficulties.Occur in recent years
A kind of weak signal extracts noise-removed technology.Seismic data is transformed to CDP trace gathers by the technology first, and normal-moveout spectrum point is carried out to it
Analysis, according to each reflecting layer position t in speed spectrum analysis data0Time opens the hour window of a certain length, then gathers related skill
Art, with reference to the stack velocity at each layer position interface, is tracked according to the continuity of seismic signal between neighboring track to useful signal
Pickup, it is other to be removed as noise.This denoising method avoids damage of the conventional noise-removed technology to useful signal, reaches
More preferably protect the effect of useful signal.
Many focus seismic acquisition technologies gather data because the same time often has the excitation signal of multiple focus mutual
Interfere and cause signal to noise ratio very low, therefore can be regarded as a kind of special low SNR data, can be extracted and gone with this weak signal
Technology is made an uproar to eliminate interference big gun noise, so that the effect of wave field separation is reached, and also this noise-removed technology is lossless to useful signal
Wound, therefore be a kind of high-precision ISS wave field separations technology.
Useful signal of the present invention based on rate pattern extracts the step block diagram of ISS wave field separation methods as shown in figure 1, bag
Include：
1) CDP trace gathers are generated
The data of many focus simultaneous shots are exactly converted into common CDP trace gathers data.
2) speed spectrum analysis and t0Time picks up
Using existing business conventional treatment software, (processing system of seismic data is a lot, and all systems have this
Function, such as：FOCUS processing systems, OMEGA processing systems etc.) normal-moveout spectrum is done to common CDP trace gathers, and normal-moveout spectrum data is carried out
Interaction analysis, tentatively picks up the t of each reflecting layer position0Time.
3) effectively continuous signal follows the trail of pickup
According to t0Time opens a hour window, using the similitude in zero-offset road and its neighbouring a few road signals, using phase
Stem algorithm, changes t0Time, coherent algorithm is recycled to pick up useful signal according to the continuity of useful signal.
4) other noise signals are removed
To not be that other all information of useful signal are regarded noise as and filtered out.
5) seismic channel data inverse transformation
Inverse transformation is carried out to common CDP trace gathers data, so that the shot gather data body formed after wave field separation.
One embodiment of this method is as follows：
This method is used for the wave field separation that ISS data is simulated to 2D first, before Fig. 2-1 and Fig. 2-2 are wave field separation
The contrast of shot gather data afterwards.Interference big gun noise energy is very strong it can be seen from big gun record figure before its wave field separation, and
Develop very much, it is difficult resolution to cause useful signal.After wave field separation, interference big gun noise is substantially completely eliminated, and illustrates this
Method is a kind of precision very high wave field separation technology.Secondly this method is used for the wave field separation that ISS data is simulated to 3D,
Fig. 3-1 and Fig. 3-2 is the contrast of shot gather data before and after 3D simulation ISS data wave field separations.Thus figure is it can be seen that this method
Separation accuracy it is very high.The method of this invention is finally applied to the wave field separation of D4S field acquisition data, such as Fig. 4-1
With shown in Fig. 4-2.Thus it is also seen that the separating effect of the inventive method.
The wave field separation of many focus seismic datas is to realize to complete to many focus seismic datas using existing business software
One of key technology of reason, is that a kind of weak signal extractive technique based on stack velocity model is used for wave field separation by this, so that
The useful signal for being developed based on rate pattern extracts ISS wave field separation technologies, i.e., utilize normal-moveout spectrum solution to concentrating in common CDP
The result released, useful signal is extracted in the capable and experienced hybrid recording for relating to big gun noise, so that elimination interference big gun noise is reached, it is real
The purpose of existing wave field separation.
Above-mentioned technical proposal is one embodiment of the present invention, for those skilled in the art, at this
On the basis of disclosure of the invention application process and principle, it is easy to make various types of improvement or deformation, this is not limited solely to
Invent the method described by above-mentioned embodiment, therefore previously described mode is preferred, and and without limitation
The meaning of property.
Claims (2)
1. a kind of useful signal based on rate pattern extracts ISS wave field separation methods, it is characterised in that：Methods described includes：
(1) CDP trace gathers are generated：The data of many focus simultaneous shots are converted into common CDP trace gathers data；
(2) speed spectrum analysis and t0Time picks up：Normal-moveout spectrum is done to the common CDP trace gathers data, and normal-moveout spectrum interacted point
Analysis, tentatively picks up the t of each reflecting layer position0Time；
(3) the effective continuous signal of pickup is followed the trail of, useful signal is obtained：
(4) other noise signals are removed：To not be that other all information of useful signal regard noise as, and from seismic channel data
These noises are directly subtracted, do not have the signal for interfering big gun noise obtained from；
(5) seismic channel data inverse transformation：Inverse transformation is carried out to the common CDP trace gathers data after step (4) processing, wave field is obtained
Shot gather data body after separation.
2. the useful signal according to claim 1 based on rate pattern extracts ISS wave field separation methods, its feature exists
In：What the step (3) was realized in：
According to t0Time opens a hour window, using the uniformity in zero-offset road and its neighbouring a few road signals, using correlation calculation
Method, calculates the time corresponding to zero-offset road peak swing in hour window, and as the t of modification0Time, further according to
The uniformity of useful signal, it is inclined using the maximum data of related algorithm calculating adjacent track data zero-offset road correlation and zero
The time difference tn in Yi Ju roads, and by its t with modification0Time is added, so that when obtaining the travelling of adjacent one of reflected signal, by
This obtains the reflected signal of the seismic channel, by that analogy, obtains the reflected signal of each seismic channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195660.XA CN105093275B (en) | 2014-05-09 | 2014-05-09 | Useful signal based on rate pattern extracts ISS wave field separation methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195660.XA CN105093275B (en) | 2014-05-09 | 2014-05-09 | Useful signal based on rate pattern extracts ISS wave field separation methods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105093275A CN105093275A (en) | 2015-11-25 |
| CN105093275B true CN105093275B (en) | 2017-08-18 |
Family
ID=54574129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410195660.XA Active CN105093275B (en) | 2014-05-09 | 2014-05-09 | Useful signal based on rate pattern extracts ISS wave field separation methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105093275B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552632B (en) * | 2020-04-23 | 2022-11-01 | 中国石油大学(北京) | Seismic cross-correlation signal pickup method and system based on wavelet domain Kalman filtering |
| CN111474584B (en) * | 2020-05-29 | 2023-05-05 | 核工业北京地质研究院 | Focusing superposition imaging method and system based on correlated seismic interference |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893719A (en) * | 2010-04-16 | 2010-11-24 | 西安石油大学 | Method for separating and de-noising wave fields of longitudinal and transverse earthquake waves |
| CN103675903A (en) * | 2012-09-07 | 2014-03-26 | 中国石油化工股份有限公司 | Multi-source seismic wave field separating method by utilizing random denoising technology |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6738715B2 (en) * | 2001-09-14 | 2004-05-18 | Exxonmobil Upstream Research Company | Method for attenuating noise in seismic data |
-
2014
- 2014-05-09 CN CN201410195660.XA patent/CN105093275B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893719A (en) * | 2010-04-16 | 2010-11-24 | 西安石油大学 | Method for separating and de-noising wave fields of longitudinal and transverse earthquake waves |
| CN103675903A (en) * | 2012-09-07 | 2014-03-26 | 中国石油化工股份有限公司 | Multi-source seismic wave field separating method by utilizing random denoising technology |
Non-Patent Citations (2)
| Title |
|---|
| FK滤波在三维VSP波场分离中的应用;吴永栓 等;《中国地球物理2009》;20091231;第470页 * |
| 地震勘探波场分离与去噪处理思路;沈鸿雁;《西部探矿工程》;20121231(第3期);第87-90,93页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105093275A (en) | 2015-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101630017B (en) | Method for separating seismic wave fields of different types in two-dimensional vertical seismic profile | |
| US9766357B2 (en) | Seismic image dip decomposition estimation and recomposition | |
| CN103926623B (en) | Method for suppressing reverse time migration low frequency noise | |
| CN106154319B (en) | A kind of method for separating for being imaged trace gather | |
| CN106154330B (en) | Electromagnetic type controlled source parabolic Radon transform suppresses parallel focus crosstalk noise method | |
| CN103675903A (en) | Multi-source seismic wave field separating method by utilizing random denoising technology | |
| CN104620132A (en) | Signal enhancement using diversity shot stacking for reverse time migration (DeSSeRT) | |
| CN105911585A (en) | Method and device for extracting seismic record regular interference waves | |
| CN110389377B (en) | Microseism offset imaging positioning method based on waveform cross-correlation coefficient multiplication | |
| CN107807393A (en) | Separate unit station collection preliminary wave Enhancement Method based on seismic interference method | |
| CN105319587A (en) | Vibroseis shaping filtering method based on first arrival wavelet extraction | |
| CN105629300B (en) | The method for improving complicated structure offset data signal-to-noise ratio | |
| CN104570116A (en) | Geological marker bed-based time difference analyzing and correcting method | |
| CN105093275B (en) | Useful signal based on rate pattern extracts ISS wave field separation methods | |
| CN104749623B (en) | A kind of imaging of seismic data processing method | |
| CN109581481B (en) | Portable high-frequency controllable seismic source seismic signal harmonic interference elimination method | |
| CN103076626A (en) | Wave field purification treatment method | |
| AU2006237348A1 (en) | Method of processing seismic data for AVO or AVOA characterisation | |
| CN105301634A (en) | Method for increasing correlation quality of controlled seismic source single shot by utilizing record of detector near to seismic source | |
| AU2015200555B2 (en) | Correction of sea surface state | |
| CN105093282A (en) | Energy replacement surface wave suppressing method based on frequency constraint | |
| CN110737022B (en) | Suppression method for vibroseis to excite noise of seismic data black triangle area | |
| CN110780346A (en) | Separation method for advanced detection of complex seismic wave field in tunnel | |
| CN105425300A (en) | Residual static correction method | |
| CN104536048A (en) | Method for automatically cutting seismic wave arrival |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |