CN106680866A - Anti-noise headpiece of geophone - Google Patents
Anti-noise headpiece of geophone Download PDFInfo
- Publication number
- CN106680866A CN106680866A CN201510759988.4A CN201510759988A CN106680866A CN 106680866 A CN106680866 A CN 106680866A CN 201510759988 A CN201510759988 A CN 201510759988A CN 106680866 A CN106680866 A CN 106680866A
- Authority
- CN
- China
- Prior art keywords
- noise
- geophone
- headpiece
- noiseless
- seismic
- 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.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/181—Geophones
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- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
An anti-noise headpiece of a geophone used in a field of oil-gas exploration and seismic exploration solves a problem of influence on high precision seismic exploration by random noises in a seismic resource collecting process. The anti-noise headpiece of the geophone is characterized in that a boss (1) in a shaft wall (2) is covered with the semi-oval anti-noise headpiece (3) made of high noise impedance material and a flyer port (4) used for fixing detector flyers is arranged in the lower edge of the anti-noise headpiece (3). Downside wind noise, side transverse waves and downside and side random noises and the like can be shielded and the signal to noise ratio of earthquake collection record can be improved, so that high precision seismic data can be obtained. The anti-noise headpiece of the geophone is low in cost and economic and practical in use.
Description
Technical field
The present invention relates to a kind of instrument used in oil-gas exploration field of seismic exploration, specifically a kind of
Noiseless helmet for geophone.
Background technology
As oil-gas exploration and development constantly develops, its target becomes increasingly complex, and the requirement to seismic prospecting is increasingly
It is high.Current seismic exploration technique is sent out from conventional seismic exploration technique to high precision seismic exploration technology
Exhibition, so as to thinner, less target zone can be differentiated than conventional seismic exploration technique.In terms of reception：Observation
System has two dimension to develop into three-dimensional, and seismic detector has hundreds of road to develop into thousand of roads, geophone sensitivity is higher,
Natural frequency is higher, many in recent years in order to ensure geophone is good with the ground coupling when especially constructing
Area is embedded in underground 50-200cm geophone.And the method that geophone is embedded in underground is had two kinds,
One is to dig a hole wave detector is embedded in into underground, and two is to make a call to a well with small-sized drill, and wave detector is inserted in into shaft bottom,
Then sponge plug on hole cover.Both geophones are embedded in ground, all play in high precision seismic exploration
Preferable effect.But because the existing compressional wave of acoustic wavefield also has a shear wave, existing upgoing wave also have down going wave with
And skidding ripple, therefore geophone is embedded in underground not only improves the reception of up reflection seismic waves and be also beneficial to
Descending and skidding disturbs the reception of ripple.Descending sound of the wind, the shear wave of skidding and descending and skidding random noise
It is very big Deng impact of the interference to high precision seismic exploration, especially have impact on seismic wave radio-frequency component
(70-300Hz) drink and effectively receive, so as to the noise when high-precision seismic data for affecting earthquake-capturing to record.
In order to solve principle of this problem present invention using the maskable sound wave of acoustic impedance thin layer, thin steel is used in proposition
The high acoustic impedance materials such as plate make noiseless helmet, covered on during earthquake-capturing on geophone, prevent it is descending,
Skidding disturbs interference of the ripple to up reflection seismic waves.
The content of the invention
The technical problem to be solved in the present invention is：Random noise etc. is disturbed to height during seismic data acquisition
The impact of precision seismic prospecting.
The technical solution adopted in the present invention is：The Noiseless helmet for geophone includes the borehole wall, has in the borehole wall
Boss is mutually covered by the noiseless helmet of half elliptic acoustic impedance material, and in noiseless helmet lower edge little line mouth is provided with
For the little line of fixed pickup.
Present invention beneficial effect compared with the prior art is：Due to geophone it is loud by half elliptic
The noiseless helmet of impedance material mutually covers so that descending sound of the wind, the shear wave of skidding and it is descending and skidding with
Machine noise etc. can be shielded, and the signal to noise ratio of earthquake-capturing record be improve, it is hereby achieved that high-precision
The seismic data of degree.
Description of the drawings
Below in conjunction with the accompanying drawings the present invention is made with specific embodiment and being illustrated more full and accurately
Fig. 1 is the structure sectional view of the present invention；
Fig. 2 is the schematic diagram of noiseless helmet 3 in Fig. 1.
1- convex wells, the 2- boreholes wall, 3- noiseless helmets, the little line mouths of 4-.
Specific embodiment
By the following examples, the present invention is described in more detail, but as long as in idea of the invention
In the range of, it is not limited in following examples.
As shown in Figure 1 with Figure 2, the Noiseless helmet for geophone includes the borehole wall 2, and the well of the borehole wall 2 is typically straight
Footpath 6-40cm, outside deep (H1) 5-200cm, inside has boss 1 to be -100cm, desirably prevents to disturb ripple,
Boss 1 is mutually covered by half elliptic noiseless helmet 3, and little line mouth 4 is provided with for fixing in the lower edge of noiseless helmet 3
Geophone flyer, wherein noiseless helmet 3 be the acoustic impedance material such as steel, iron and fiberglass, its thickness in 0.5-2mm,
So that shield effectiveness it is good (because noiseless helmet acoustic impedance is higher, the energy for reflecting back is bigger, transmit into
The energy for going is less).And the half elliptic of noiseless helmet 3, refer to diameter 5-50cm, high 1-100cm or so
Half elliptic (as shown in Figure 2).And little line mouth 4 is provided with Noiseless helmet for geophone bottom, it is in order to anti-
Stop loss the little line of bad geophone and fixed earthquake geophone flyer reduces the vibrations biography of the little line of geophone
Lead.
When actually used, after geophone is plugged, then noiseless helmet 3 is covered on geophone, i.e.,
The earthquake reflected wave for exciting can be received, seismic noise can significantly be suppressed, can be carried compared with conventional method
More than 4 times of the signal to noise ratio of high earthquake acquisition and recording, is conducive to earthquake shelf to penetrate effective reception of radio-frequency component, from
And obtain high-precision seismic data.
Claims (1)
1. a kind of Noiseless helmet for geophone used being related in oil-gas exploration field of seismic exploration, wraps
Include the borehole wall (2), it is characterised in that：There is boss (1) by half elliptic acoustic impedance material in the borehole wall (2)
Noiseless helmet (3) mutually covers, and little line mouth (4) is provided with for the little line of fixed pickup in noiseless helmet (3) lower edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510759988.4A CN106680866A (en) | 2015-11-06 | 2015-11-06 | Anti-noise headpiece of geophone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510759988.4A CN106680866A (en) | 2015-11-06 | 2015-11-06 | Anti-noise headpiece of geophone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106680866A true CN106680866A (en) | 2017-05-17 |
Family
ID=58863672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510759988.4A Pending CN106680866A (en) | 2015-11-06 | 2015-11-06 | Anti-noise headpiece of geophone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106680866A (en) |
-
2015
- 2015-11-06 CN CN201510759988.4A patent/CN106680866A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170517 |
|
| WD01 | Invention patent application deemed withdrawn after publication |