CN107907907A - A kind of carbonate rock area earthquake reflective data acquisition method - Google Patents
A kind of carbonate rock area earthquake reflective data acquisition method Download PDFInfo
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- CN107907907A CN107907907A CN201711192866.7A CN201711192866A CN107907907A CN 107907907 A CN107907907 A CN 107907907A CN 201711192866 A CN201711192866 A CN 201711192866A CN 107907907 A CN107907907 A CN 107907907A
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- carbonate rock
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/10—Aspects of acoustic signal generation or detection
- G01V2210/16—Survey configurations
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- Acoustics & Sound (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of carbonate rock area earthquake reflective data to gather construction technology, and earthquake reflective data acquisition method is carried out according to the following steps：1）Select representative location to carry out experiment work, determine optimal excitation well depth and dose；2) according to situations such as the lithology of carbonate rock different section, landform, excitation well location is reasonably selected, using different type drilling machine pore-forming；2) the pre-buried inspection hole depth of pvc pipe is taken, takes " three grass " method to ensure explosive sinking safety；3）The vexed well of mud is taken, improves the degree of coupling of powder column and the borehole wall, ensures stimulation effect；4) high explosion-speed seismic explosive columns are selected, saturation excitation meets ceiling capacity principle；5) using small distance between receivers, high degree of covering, object-oriented dynamic observation system design method；6) coupling effect of wave detector is improved using multiple means；The present invention is easy to implement, being capable of the larger quality for improving carbonate rock area seismic acquisition data.
Description
Technical field
The present invention relates to a kind of collecting method, is specifically a kind of carbonate rock area earthquake reflective data collection side
Method.
Background technology
Carbonate rock is mainly characterized by that speed is high, density is big, and karstification phenomenon is serious, often forms the ground constructed suddenly
Shape complex area, and carbonate rock itself physical difference is small, the reflectance anomaly of interior layer position is faint, usually floods by various noises
Carbonate rock brittleness is high, and hardness is big, and excitation energy decays acutely because of Brittle fracture of rocks, causes deep purpose reflection stratum
Signal-to-noise ratio is relatively low, so as to influence the precision of seismic prospecting.
The uniform carbonate rock of lithology can seldom be seen simple multiple superposed is presented, with the change on sea level, carbonate
Rock is often exposed in air, and by diagenesis and karstification, the various holes of generation become good reservoir space, while
Uneven plastids of the propagation of seismic wave as scattering source is compromised, space scattering will be done to the propagation of seismic wave, or even produce
" penetration problem ", thus seriously reduce seismic acquisition quality carbonate rock areas construct suddenly, varied topography area carbonate rock
The cross directional variations of regional often Lithology are big, and seismic prospecting is constructed in the reception of the stratum of different rate of decay, wave detector
" coupled problem " is prominent so that and condition of acceptance becomes complex, meanwhile, the difference of bare calcareous rock area rate of decay will
Produce " static correction problem " particularly carbonate rock areas and often form the varied topography area constructed suddenly so that wave field becomes ten
Divide complexity, so as to cause the seismic prospecting of " imaging problem " bare calcareous rock area prominent in seismic prospecting with containing mountainous region
All difficulties of seismic exploration, while also there is carbonate rock own characteristic, as inhomogeneities is strong, physical difference is small, porosity
It is low, permeability is poor, crack and solution cavity development, stratigraphic dip is steep, subsurface structure is complicated etc. influences seismic prospecting it is maximum be rock
Property inhomogeneities.
Bare calcareous rock area/carbonate rock close to earth's surface be the Basic Geological situation that runs into of southern mountain exploration.Earth's surface
Complicated is excitation to the main problem that seismic prospecting is brought and condition of acceptance is poor, serious interference and how to ask for static correction value and choosing
Take suitable datum level；The mainly foundation of rate pattern and the engineering construction system problem that subsurface structure complicated band is come.Therefore,
When bare calcareous rock area carries out seismic prospecting, outstanding behaviours is excitation, Receiver Problem and high speed secondary disturbances problem, special
It is not that the heart is more difficult in the collection of reflectance data.
The content of the invention
It is an object of the invention to provide a kind of carbonate rock area earthquake reflective data acquisition method, to solve the above-mentioned back of the body
The problem of being proposed in scape technology.
To achieve the above object, the present invention provides following technical solution：
A kind of carbonate rock area earthquake reflective data gathers construction technology, and earthquake reflective data acquisition method is according to the following steps
Carry out：1）Select representative location to carry out experiment work, determine optimal excitation well depth and dose；2) it is different according to carbonate rock
Situations such as lithology in location, landform, reasonably select excitation well location, using different type drilling machine pore-forming；2) the pre-buried inspection of pvc pipe is taken
Hole depth is looked into, takes " three grass " method to ensure explosive sinking safety；3）The vexed well of mud is taken, improves the coupling journey of powder column and the borehole wall
Degree, ensures stimulation effect；4) high explosion-speed seismic explosive columns are selected, saturation excitation meets ceiling capacity principle；5) using small distance between receivers, height
Degree of covering, object-oriented dynamic observation system design method；6) coupling effect of wave detector is improved using multiple means.
As the further scheme of the present invention：The selection of the excitation well position needs to be examined by geology detection device
Survey, and need to carry out probing experiment, finally just can determine that the position of excitation well.
As the further scheme of the present invention：The excitation well drilling depth is more than 10 meters.
As the further scheme of the present invention：Either combination well excitation includes list deep-well to the list deep-well or combination well swashs
Hair.
As the further scheme of the present invention：The saturation excitation is that saturation explosive is filled in excitation well, is then existed again
Filling rock substance in excitation well.
As the further scheme of the present invention：The explosive is TNT explosives.
As the further scheme of the present invention：The split shooting is to receive ignition charge in arrangement.
As the further scheme of the present invention：The means of the coupling effect for improving wave detector have the side by pasting mud cake
Formula is coupled.
As the further scheme of the present invention：The means of the coupling effect for improving wave detector, which have, passes through cement/plaster
Consolidation coupling.
As the further scheme of the present invention：The means of the coupling effect for improving wave detector have by embedding coupling of digging pit
Close and set.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention is easy to implement, by using the vexed well of mud, with
Improvement condition, by using detector array, compacting scattering interference, by the way of small distance between receivers, high degree of covering, can realize
The collection of earthquake reflective data, can effectively ensure that data acquisition effect, the interference of reduction extraneous factor by a relatively large margin, right
Earthquake reflective data collecting work, which has, is obviously improved effect.
Embodiment
The technical solution in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this area is common
Technical staff's all other embodiments obtained without making creative work, belong to the model that the present invention protects
Enclose.
In the embodiment of the present invention, a kind of carbonate rock area earthquake reflective data acquisition method, the earthquake reflective data
Acquisition method is carried out according to the following steps：1) first according to the actual conditions of carbonate rock different regions, the position of selective exitation well
Put, then the depth of selective exitation well, excitation well depth is more deep better in principle, general to be swashed using single deep-well or combination well
Hair；2) excited using saturation, using the vexed well of mud, carry the stimulation effect of highly excited elastic property and compressional wave；3) in excitation
The fried heat of selection is high, quick-fried appearance is big, makees the big explosive of power, and saturation, which excites, meets ceiling capacity criterion, and optimal dose excitation meets most
Big signal-to-noise ratio (SNR) Criterion, geological tasks realize that requirement meets maximum signal noise ratio principle；4) using high degree of covering, split shooting；5)
Using object-oriented dynamic observation system designing technique, small distance between receivers construction technology, adaptation to local conditions selection shot point；6) using a variety of
Means improve the coupling effect of wave detector；7) by the cooperation of seismic wave collecting sensor and wave detector, reflectance data is realized
Collect, the selection of excitation well position needs to be detected by geology detection device, and needs to carry out probing experiment, last ability
Determine the position of excitation well, excitation well drilling depth is more than 10 meters, single deep-well or combination well excitation include multigroup list deep-well or
Person's combination well excites, and saturation excitation is that saturation explosive is filled in excitation well, then fills insulation rock thing in excitation well again
Matter, explosive are TNT explosives, and split shooting is to connect control device by lead to blow out with single-point, it can be achieved that blowing out at the same time, is improved
The means of the coupling effect of wave detector have to be coupled by way of pasting mud cake, and the means for improving the coupling effect of wave detector have
Consolidated and coupled by cement/plaster, improving the means of the coupling effect of wave detector has by embedding coupling setting of digging pit.
The present invention is easy to implement, and by using the vexed well of mud, to improve condition, by using detector array, compacting dissipates
Blackberry lily is disturbed, and by the way of small distance between receivers, high degree of covering, can be realized the collection of earthquake reflective data, be can effectively ensure that
Data acquisition effect, the interference of reduction extraneous factor by a relatively large margin, has earthquake reflective data collecting work and significantly carries
Ascending effect, has great market application foreground, and economic benefit is obvious.
For the present invention by tackling key problems for many years, the area such as Chuan Dong bare calcareous rock area seismic method achieves larger progress,
The seismic data that bare calcareous rock area is obtained obtained the abundant reflective information including deep reflex, by subsequent treatment
It is basically available in structure interpretation so that the exploration prospect in Carbonate Rock Areas, Southern China area is brighter and clearer.
Chuan Dong Tongnanba area the north close to meter Cang Shan, one band of Daba Mountain be distributed with large area middle Paleozoic group limestone and
Large inclination, Fuling limestone exposure area, paradise dam limestone exposure area etc., produce with reference to field, have carried out large area limestone and gone out
Reveal area and mountain front, clod cover area seismological research, on the basis of its difficult point is analyzed, take Corresponding Countermeasures, achieve effect.
Effective method of work that carbonate rock exposure area uses has:Using advanced earthquake equipment, in excitation, technique and observation system are received
Make an effort in system design, using more well depth well group conjunctions, secondary excitation, the works such as detector array, small distance between receivers, high degree of covering of going here and there more
Make to emphasize combining closely for earthquake and geology in method production processes, what is gathered, handle, explaining combines closely, Party A, Party B
Combine closely, field production is combined closely with PRODUCTION TRAITS, theoretical research, and exploration deployment is closely tied with earthquake production
Close the more well depth well groups of to close, the general deep-well multiple shot array using three mouthfuls of more than 20m, energy is passed to improve under seismic wave, secondary to swash
Hair, more than 30 meters of deep-wells are first exploded with small pit goaf, form a rock failure mechanism of rock circle, are excited with big dose, and
Using the vexed well of mud, detector array is gone here and there to improve condition more, compacting scattering interference, small distance between receivers, high degree of covering:Small distance between receivers,
High degree of covering earthquake-capturing has obvious effect in eastern Sichuan Basin, and general degree of covering is more than 120 times.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (10)
1. the invention discloses a kind of carbonate rock area earthquake reflective data to gather construction technology, earthquake reflective data collection side
Method is carried out according to the following steps：1）Select representative location to carry out experiment work, determine optimal excitation well depth and dose；2) root
Situations such as according to the lithology of carbonate rock different section, landform, reasonably select excitation well location, using different type drilling machine pore-forming；2)
The pre-buried inspection hole depth of pvc pipe is taken, takes " three grass " method to ensure explosive sinking safety；3）The vexed well of mud is taken, improves medicine
The degree of coupling of column and the borehole wall, ensures stimulation effect；4) high explosion-speed seismic explosive columns are selected, saturation excitation meets ceiling capacity original
Then；5) using small distance between receivers, high degree of covering, object-oriented dynamic observation system design method；6) improved using multiple means
The coupling effect of wave detector.
2. carbonate rock area earthquake reflective data according to claim 1 gathers construction technology, it is characterised in that described
The selection of excitation well position needs to be detected by geology detection device, and needs to carry out probing experiment, finally just can determine that
The position of excitation well.
3. earthquake reflective data acquisition method in carbonate rock area according to claim 1, it is characterised in that the excitation
Well drilling depth is more than 10 meters.
4. earthquake reflective data acquisition method in carbonate rock area according to claim 1, it is characterised in that the Dan Shen
Either combination well excitation includes single deep-well or combination well excitation to well.
5. earthquake reflective data acquisition method in carbonate rock area according to claim 1, it is characterised in that the saturation
Excite to fill optimal explosive charge in excitation well, then fill rock substance in excitation well again.
6. earthquake reflective data acquisition method in carbonate rock area according to claim 1, it is characterised in that the explosive
For TNT explosives.
7. earthquake reflective data acquisition method in carbonate rock area according to claim 1, it is characterised in that the centre
Blow out is to receive ignition charge in arrangement.
8. earthquake reflective data acquisition method in carbonate rock area according to claim 1, it is characterised in that the raising
The means of the coupling effect of wave detector have to be coupled by way of pasting mud cake.
9. earthquake reflective data acquisition method in carbonate rock area according to claim 1, it is characterised in that the raising
The means of the coupling effect of wave detector, which have to consolidate by cement/plaster, to be coupled.
10. earthquake reflective data acquisition method in carbonate rock area according to claim 1, it is characterised in that described to carry
The means of the coupling effect of high wave detector have to be set by embedding coupling of digging pit.
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| CN201711192866.7A CN107907907A (en) | 2017-11-24 | 2017-11-24 | A kind of carbonate rock area earthquake reflective data acquisition method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415577A (en) * | 2020-11-24 | 2021-02-26 | 中国矿业大学(北京) | Method and system for embedding detector under karst landform |
-
2017
- 2017-11-24 CN CN201711192866.7A patent/CN107907907A/en active Pending
Non-Patent Citations (6)
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| 李桂林，等: "南方复杂山地碳酸盐岩出露区地震采集技术分析", 《现代地质》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112415577A (en) * | 2020-11-24 | 2021-02-26 | 中国矿业大学(北京) | Method and system for embedding detector under karst landform |
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Application publication date: 20180413 |