CN104237970B - Electromagnetism of Earthquake joint exploration system and its data acquisition device and collecting method - Google Patents
Electromagnetism of Earthquake joint exploration system and its data acquisition device and collecting method Download PDFInfo
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- CN104237970B CN104237970B CN201410490777.0A CN201410490777A CN104237970B CN 104237970 B CN104237970 B CN 104237970B CN 201410490777 A CN201410490777 A CN 201410490777A CN 104237970 B CN104237970 B CN 104237970B
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Abstract
The invention provides a kind of Electromagnetism of Earthquake joint exploration system and its data acquisition device and collecting method, the system includes some Electromagnetism of Earthquake joint exploration data acquisition devices, for synchronous acquisition controllable electromagnetic field excitation source, the electromagnetism and seismic exploration data of Natural electromagnetic field source, artificially focus and the unartificial seismic origin；Some controllable electromagnetic field excitation sources, it is uniformly distributed around above-mentioned harvester；Several artificially focus, it is above-mentioned harvester periphery is uniform or random distribution.Each Electromagnetism of Earthquake joint exploration data acquisition device includes Electromagnetism of Earthquake data collection station, simple component or 3-component earthquake signal geophone, three-component magnetic field sensor and some groups of orthogonal electric-field sensors of the geological data for gathering exploration targets region, geological data, magnetic field and electric field data for correspondence collection exploration targets region.The present invention can reduce the Source effects and exploration cost of Electromagnetism of Earthquake joint exploration.
Description
Technical field
The present invention relates to technical field of geophysical exploration, more particularly, to a kind of Electromagnetism of Earthquake joint exploration system and its
Data acquisition device and collecting method.
Background technology
Geophysical exploration method mainly has the exploitation methods such as seismic wave method, DC electrical method, magnetic method, gravitational method and electromagnetic method.
Wherein electromagnetic method is also known as " electromagnetic induction method ", the difference of electric conductivity and magnetic conductivity according to rock or ore, using electromagnetic induction
The method that principle carries out exploration prospecting, is referred to as electromagnetic method.
At present, seismic technology still faces larger challenge in complex area, and such as overlying formation lithology change causes speed different
Often, imaging deep is caused to be forbidden；Deep reflex signal to noise ratio is low, is imaged unclear, Lithology Discrimination hardly possible, it is impossible to determine favo(u)rable target；Ground
The construction and stratigraphic-hthologic trap exception for finding are shaken, how to judge whether having industry oil gas price value；Latter period of oilfield development, remaining oil
How gas, oil and water zonation are effectively drawn a circle to approve.Because electromagnetism is better than earthquake to target acquisition effect under high resistant stratum, formation lithology is become
Change reflection sensitive, it is sensitive to hydrocarbon saturation reacting condition, therefore utilize electromagnetic method, then it is expected to auxiliary and solves these problems.But,
Because electromagnetic technique resolution ratio is relatively low, can only be used as supplementary means in fine granularing scalability.In recent years, electromagnetism-seismic technology joint
Using having played important function at the aspect such as structural belt and special objective joint interpretation, hydrocarbon trap joint-detection evaluation.
Traditional magneto-electrotelluric exploration utilizes natural field source, therefore without the concern for the laying of field source.It is widely used at present
Controllable source audio frequency electromagnetic exploration method and skew transient electromagnetic exploitation method long all only lay one and excite field source, can only be on the scene
Electromagnetic field signal is received near source in certain limit, when an excitation energy for field source can not meet reception in distance reception point
During the to-noise ratio requirement of signal, correct position is just selected to lay field source again.There is a series of asking in the single signal for exciting field source
Topic：Firstly, since the exciting field in the complexity of subsurface structure, diverse location or orientation is existed due to the different meetings of electromagnetic field transmitting procedure
Receiving point produces notable difference；Second, source of leaving the theatre is far and near different, and the field source for reaching receiving point by ground, aerial and underground is believed
Number composition and energy difference are very big, therefore, the field source characteristic of receiving point has differences.Such as near region, predominantly underground direct wave
, and far field is then mainly from ground or airborne plane wave, therefore, the signal for receiving is seriously by non-exploration targets
Influence, also has transition region between near region and far field, and its electromagnetic nature is increasingly complex.Therefore, traditional controllable source electromagnetism
Method exploration usually can not very well be eliminated because of Source effects and its application effect is had a greatly reduced quality, or even produce error result.
Additionally, in ground observation work at present, earthquake and the collection of electromagnetic data are carried out separately, and such data are adopted
Mode set causes the relatively costly of Electromagnetism of Earthquake joint exploration.
The content of the invention
Adopted it is an object of the invention to provide a kind of Electromagnetism of Earthquake joint exploration system and its data acquisition device and data
Diversity method, to reduce the Source effects and exploration cost of Electromagnetism of Earthquake joint exploration.
To reach the purpose of the exploration cost of above-mentioned reduction Electromagnetism of Earthquake joint exploration, the invention provides a kind of ground seismoelectric
Magnetic joint exploration data acquisition device, the device includes：
One Electromagnetism of Earthquake data collection station, it has a 3-component earthquake detector, or three simple component seismic detections
Device, it passes through corresponding geological data passage and is connected with the controller of the Electromagnetism of Earthquake data collection station, is explored for gathering
The simple component or three-component seismic data of target area；
Some groups of orthogonal electric-field sensors, it is by corresponding electromagnetic data passage and the Electromagnetism of Earthquake data acquisition
The controller stood is connected, two components or three-component electric field data for gathering the exploration targets region；
Three-component magnetic field sensor, it passes through corresponding electromagnetic data passage and is connected with the controller, for gathering
The three-component magnetic field data in the exploration targets region.
Electromagnetism of Earthquake joint exploration data acquisition device of the invention, the geological data passage and the electromagnetic data lead to
Road includes：
Preamplifier, for the simulation for collecting corresponding geophone, electric-field sensor or magnetic field sensor
Signal carries out preposition enhanced processing, obtains the analog signal amplified；
Analog-digital converter, for the analog signal of the amplification to be carried out into analog-to-digital conversion, acquisition is suitable at the controller
The data signal of reason；
Memory, for preserving the data signal under the control of the controller.
Electromagnetism of Earthquake joint exploration data acquisition device of the invention, the geophone for simulation geophone or
Digital geophone, the electric-field sensor is unpolarizable electrode pair, and described magnetic field sensor is fluxgate type or sensing
Coil type magnetic field sensor.
Electromagnetism of Earthquake joint exploration data acquisition device of the invention, the frequency response scope covering of the electric-field sensor
The frequency band range in controllable electromagnetic field excitation source and the frequency band range of the earth or Natural electromagnetic field；And the frequency of the magnetic field sensor
The frequency band range of frequency band range and nagneto-telluric field with response range covering controllable electromagnetic field excitation source.
Electromagnetism of Earthquake joint exploration data acquisition device of the invention, each described geological data passage and the electromagnetism number
An independent power supply is each equipped with according to passage.
Electromagnetism of Earthquake joint exploration data acquisition device of the invention, the Electromagnetism of Earthquake data collection station is wireless remote control
Electromagnetism of Earthquake data collection station.
To reach the purpose of the Source effects of above-mentioned reduction Electromagnetism of Earthquake joint exploration, on the one hand, the invention provides one
Electromagnetism of Earthquake joint exploration system is planted, the system includes：
Several above-mentioned Electromagnetism of Earthquake joint exploration data acquisition devices, for gathering controllable electromagnetic field excitation source, day
The survey data of right Electromagnetic Sources, artificially focus and the unartificial seismic origin；
Several controllable electromagnetic field excitation sources, it uniformly divides around the Electromagnetism of Earthquake joint exploration data acquisition device
Cloth；
Several artificially focus, it is uniform or random point of Electromagnetism of Earthquake joint exploration data acquisition device periphery
Cloth.
Electromagnetism of Earthquake joint exploration system of the invention, described several controllable electromagnetic field excitation sources excite for four levels
Electric dipole current source, four levels excite that electric dipole current source is end to end to surround foursquare four orientation electromagnetism excitation field source.
Electromagnetism of Earthquake joint exploration system of the invention, four levels excite adjacent dipole electric current in electric dipole current source
Two, source current electrode shares an earth electrode.
Electromagnetism of Earthquake joint exploration system of the invention, four levels excite that electric dipole current source is end to end to be surrounded
Foursquare side ratio exploration targets region strike length is big by 10%~20%.
Electromagnetism of Earthquake joint exploration system of the invention, when exploration targets region strike length is more than preseting length, matches somebody with somebody
Put multiple four orientation electromagnetism excitation field sources and cover exploration target area successively.
Electromagnetism of Earthquake joint exploration system of the invention, adjacent two four in the multiple four orientation electromagnetism excitation field source
20% area is overlapped between orientation electromagnetism excitation field source.
Electromagnetism of Earthquake joint exploration system of the invention, described several controllable electromagnetic field excitation sources excite successively, described
Several Electromagnetism of Earthquake joint exploration data acquisition device synchronous acquisitions each described controllable electromagnetic field excitation source excitations is produced
Electromagnetic data.
Electromagnetism of Earthquake joint exploration system of the invention, it is described several artificially focus excite successively, it is described several
The geological data that Electromagnetism of Earthquake joint exploration data acquisition device synchronous acquisition each described artificial earthquake source excitation is produced.
To reach the purpose of the Source effects of above-mentioned reduction Electromagnetism of Earthquake joint exploration, on the other hand, the present invention is also provided
A kind of collecting method of above-mentioned Electromagnetism of Earthquake joint exploration system, comprises the following steps：
A, several artificially in focus one artificially focus is excited, either synchronously or asynchronously excite several controllable electromagnetics
A controllable electromagnetic field excitation source in field excitation source；
B, make the ground that several Electromagnetism of Earthquake joint exploration data acquisition device synchronous acquisitions artificial earthquake source excitations goes out
Shake signal, makes described several Electromagnetism of Earthquake joint exploration data acquisition devices either synchronously or asynchronously gather the controllable electromagnetic field excitation
The electromagnetic signal that source excitation goes out；
C, repeat the above steps, until being sequentially completed described several artificially all people building site epicenter excitations in focus
And earthquake data acquisition, and it is sequentially completed all of controllable electromagnetic field excitation source in described several controllable electromagnetic field excitation sources
Excite and electromagnetic field data gather.
The collecting method of Electromagnetism of Earthquake joint exploration system of the invention, described several controllable electromagnetic field excitation sources
For four levels excite electric dipole current source, four levels excite that electric dipole current source is end to end to surround foursquare four orientation electricity
Magnetic excites field source.
The collecting method of Electromagnetism of Earthquake joint exploration system of the invention, four levels excite electric dipole current source
In two neighboring electric dipole current source current electrode share an earth electrode.
The collecting method of Electromagnetism of Earthquake joint exploration system of the invention, four levels excite electric dipole current source
The end to end foursquare side ratio exploration targets region strike length for surrounding is big by 10%~20%.
The collecting method of Electromagnetism of Earthquake joint exploration system of the invention, when exploration targets region, strike length is more than
During preseting length, multiple four orientation electromagnetism excitation field sources are configured.
The collecting method of Electromagnetism of Earthquake joint exploration system of the invention, the multiple four orientation electromagnetism excitation field source
In overlap between adjacent two four orientation electromagnetism excitation field source exploration targets regions 20% area.
Electromagnetism of Earthquake joint exploration system of the invention can carry out comprehensive hair transmitting and excitation to geologic objective, so that
Can eliminate by the single Source effects for exciting field source to cause, also, Electromagnetism of Earthquake joint exploration data acquisition device therein
Earthquake data acquisition and electromagnetic data acquisition function are integrated with, so that can both gather geological data can also synchronous acquisition electromagnetism
Data, compared with the separate collection of existing geological data and electromagnetic data, reduce equipment consumption and exploration time, so as to reduce
The exploration cost of Electromagnetism of Earthquake joint exploration.The present invention is applied to land two and three dimensions Electromagnetism of Earthquake joint exploration.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, not
Constitute limitation of the invention.In the accompanying drawings：
Fig. 1 is the structured flowchart of the Electromagnetism of Earthquake joint exploration data acquisition device of one embodiment of the invention；
Fig. 2 is the structured flowchart of the Electromagnetism of Earthquake joint exploration system of one embodiment of the invention；
Fig. 3 is the structured flowchart of the Electromagnetism of Earthquake joint exploration system of another embodiment of the present invention；
Fig. 4 is the structured flowchart of the Electromagnetism of Earthquake joint exploration system of another embodiment of the present invention；
Fig. 5 is the flow chart of the collecting method of the Electromagnetism of Earthquake joint exploration system of one embodiment of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further details.Here, schematic description and description of the invention is used to explain the present invention, but do not make
It is limitation of the invention.
Below in conjunction with the accompanying drawings, specific embodiment of the invention is described in further detail.
The Electromagnetism of Earthquake joint exploration data acquisition device of the embodiment of the present invention is in existing earthquake data acquisition station base
Improvement on plinth, with reference to shown in Fig. 1, it includes：
One Electromagnetism of Earthquake data collection station, it has three-component analog or digital earthquake wave detector (Gx, Gy and Gz),
The control that the three-component analog or digital earthquake wave detector passes through corresponding geological data passage and Electromagnetism of Earthquake data collection station
Device is connected, the geological data for gathering exploration targets region；The Electromagnetism of Earthquake data collection station can also use three single point
Amount analog or digital earthquake wave detector replaces three-component analog or digital earthquake wave detector；
, to (Ex, Ey or Ez), it passes through corresponding electromagnetic data passage with ground for two groups or three groups of orthogonal unpolarizable electrodes
The controller of seismoelectric magnetic data acquisition station is connected, for gather exploration targets region two components (Ex, Ey) or three-component (Ex,
Ey, Ez) electric field data；
Three-component magnetic field sensor (Hx, Hy and Hz), it is by corresponding electromagnetic data passage and Electromagnetism of Earthquake data
The controller of acquisition station is connected, the three-component magnetic field data for gathering the exploration targets region.
For convenience of controlling, above-mentioned Electromagnetism of Earthquake data collection station preferred wireless remotely seismoelectric magnetic data acquisition station, its bag
Containing a GPS receiving antenna, a wireless data transceiving antenna (such as WiFi or bluetooth etc.).
In the embodiment of the present invention, above-mentioned each geological data passage and electromagnetic data passage are by a high sensitivity, low
Noise, low drifting, the preamplifier of low-power consumption, 32 analog-digital converters, a memory (flash card), and ensure every
The independent power supply composition of individual geological data passage and electromagnetic data passage normal work.Wherein：
Preamplifier, for the mould for collecting corresponding geophone, unpolarizable electrode pair or magnetic field sensor
Intending signal carries out preposition enhanced processing, obtains the analog signal amplified；
Analog-digital converter, for the analog signal of amplification to be carried out into analog-to-digital conversion, acquisition is suitable to Electromagnetism of Earthquake data acquisition
The data signal of the controller treatment stood；
Memory, for preserving data signal under the control of the controller of Electromagnetism of Earthquake data collection station.
In the embodiment of the present invention, the frequency response scope of above-mentioned unpolarizable electrode pair and magnetic field sensor covers controllable electric
The frequency band range in magnetic excitation source and the frequency band range of nagneto-telluric field.Further, since the electrode pole of the metal electrode of routine
Change effect very strong, and the field intensity amplitude of the electric field component of inducted secondary field is very small, so the gold of strong electrode polarization cannot be used
Belong to the electric field component of electrode measurement inducted secondary field, so the embodiment of the present invention can only be with unpolarizable electrode to measuring sensing two
The electric field component of secondary field.
As can be seen here, there are the Electromagnetism of Earthquake joint exploration data acquisition device of the embodiment of the present invention 3 geological datas to adopt
Collection passage, 6 electromagnetic field data acquisition channels (3 gather for electric field data, and 3 gather for magnetic field data), so that structure
Into an Electromagnetism of Earthquake data acquisition device for 9 passages, realize that an equipment is provided simultaneously with electric field data collection, magnetic field data
Collection is integrated with earthquake data acquisition, compared with the separate collection of existing geological data and electromagnetic data, reduces equipment use
Amount, improves production efficiency, so as to reduce the exploration cost of Electromagnetism of Earthquake joint exploration.
The Electromagnetism of Earthquake joint exploration system of the embodiment of the present invention includes：
The above-mentioned Electromagnetism of Earthquake joint exploration data acquisition device of several regularly arranged (can also be non-regularly arranged),
Survey data for gathering controllable electromagnetic field excitation source, natural field source, artificially focus and the unartificial seismic origin；
Several controllable electromagnetic field excitation sources, it is uniformly distributed around Electromagnetism of Earthquake joint exploration data acquisition device；
And several artificially focus, it is uniform or random point of Electromagnetism of Earthquake joint exploration data acquisition device periphery
Cloth.
The Electromagnetism of Earthquake joint exploration system to the embodiment of the present invention is specifically described below：
With reference to shown in Fig. 2, when underground reservoir targets are carried out with 3-D seismics and five components (two electric three magnetic) controllable source electromagnetism
During joint exploration, (i.e. exploration targets region) lays three-dimensional survey line above subsurface reservoir target, in two Electromagnetism of Earthquake data
Man-made explosion 1 (such as conventional explosives focus, weight focus, controllable earthquake source etc.) is laid in collection survey line middle, along three-dimensional
Survey line presses Construction Design Schemes and lays above-mentioned wireless remote control Electromagnetism of Earthquake data acquisition device 2, around the exploration targets region
Lay four mutually perpendicular levels and excite electric dipole current source 3, electric dipole current source is excited to level by high power electric power supply system 4
The 3 high-power square wave currents 5 that different frequency is provided.For the collection of three-dimensional controllable source electromagnetic data, if representing that electromagnetism swashs with AB
Hair field source, four levels are excited electric dipole current source 3 to be respectively designated as A1B1, A2B2, A3B3, A4B4 by we, four levels
Excite that electric dipole current source is end to end to surround foursquare four orientation electromagnetism excitation field source.Wherein, four levels excite dipole electricity
Two neighboring power supply point pole shares an earth electrode in stream source 3, can so save the arrangement of earth electrode, improves data acquisition
Efficiency.Further, since the underground geologic bodies buried depth of detection is very big (several kilometers deep), small-power level excites electric dipole current source on ground
The sensing secondary electromagnetic field signal amplitude excited on lower reservoir targets is very small, the wireless remote control Electromagnetism of Earthquake data of surface deployment
Harvester does not collect effective inducted secondary field signal, therefore, only select the level of large power long pole span to excite dipole
Current source could improve the amplitude of its secondary electromagnetic field signal for being excited, and improve the signal to noise ratio of signal.
According to the depth and size of Study of The Underground reservoir targets, covering activating system in four orientation of design is excited due to being close to
Nearby its primary field for exciting can greatly influence by force very much the measurement level of wireless remote control Electromagnetism of Earthquake data acquisition device 2 to excite in source
The induction field (secondary field) that underground geologic bodies are produced when electric dipole current source 3 (primary field) is powered off.So wireless remote control Electromagnetism of Earthquake
Data acquisition device 2 will be laid in beyond being excited with a certain distance from electric dipole current source 3 from level.Due to exciting dipole electricity near level
Wireless remote control Electromagnetism of Earthquake data acquisition device 2 is not nearby laid in stream source 3, so the length of side of four orientation electromagnetism excitation field sources is long
Spend than needing the geology body length (i.e. exploration targets region strike length) of detection long by 10%~20%.Additionally, right to ensure
The survey data covering of large scale geologic body, when exploration targets region strike length is more than preseting length, then needs configuration multiple
Four orientation electromagnetism excitation field sources cover exploration targets region successively.For example assume that the length of side of four orientation electromagnetism excitation field sources is maximum
It is 10km, if exploration targets region strike length is more than 8km, needs to lay two or more four orientation electromagnetism excitation
Source, 20% area will be overlapped between the orientation electromagnetism excitation field source of each two four.
In the embodiment of the present invention, each wireless remote control Electromagnetism of Earthquake data acquisition device 2 has 3 earthquake data acquisitions to lead to
Road, can connect 1 three-component (Gx, Gy, Gz) simulation geophone or 1 tri-component digital geophone, it is also possible to
Once connect three simple component analog or digital earthquake wave detector/seismic detector strings.Each wireless remote control Electromagnetism of Earthquake data
Harvester 2 simultaneously also 6 electromagnetic data acquisition channels, can be used for synchro measure simple component, two components, three-component, four points
Amount, five components or six component electromagnetic field datas, five component electromagnetic field datas are respectively level parallel with field source AB and vertical
Electric field component EX, EY, horizontal component ofmagnetic field HX, HY and the magnetic-field component HZ perpendicular to ground.Six component electromagnetic field datas point
It is not horizontal electric field component EX, EY parallel with field source AB and vertical, perpendicular to the electric field component EZ on ground, horizontal component ofmagnetic field
HX, HY and the magnetic-field component HZ perpendicular to ground.
In the Electromagnetism of Earthquake joint exploration system of the embodiment of the present invention, three-dimensional laying is all wireless in exploration targets region
Remotely seismoelectric magnetic data harvester 2 is the seismic signal that synchronous acquisition each man-made explosion 1 is excited, and is then adopted again
Collect the seismic signal that next man-made explosion 1 is excited, be sequentially completed what all man-made explosions 1 in exploration targets region were excited
The data collection task of seismic signal.It is also sequentially to excite successively that the level in four orientation excites electric dipole current source 3, when one
When the level in individual orientation excites electric dipole current source 3 to excite, the three-dimensional all wireless remote controls ground seismoelectric laid in exploration targets region
Magnetic data harvester 2 is also the electromagnetic wave signal that synchronous acquisition each level excites electric dipole current source 3 to excite, and is then adopted again
Collect the electromagnetic wave signal that next level excites electric dipole current source 3 to excite, be sequentially completed to all levels in exploration targets region
Excite the data collection task of the electromagnetic wave signal that electric dipole current source 3 excites.In the embodiment of the present invention, man-made explosion 1 and level
Excite the electric dipole current source 3 can be while exciting, it is also possible to be excited when different.
With reference to shown in Fig. 3, in above-mentioned Electromagnetism of Earthquake joint exploration system embodiment, if in the nothing laid in three dimensions
Remotely man-made explosion 1 is only arranged without arranging controllable electromagnetic field excitation source in the surrounding of seismoelectric magnetic data harvester 2 four directions to line, then
The three-dimensional surface seismic data that all wireless remote control Electromagnetism of Earthquake data acquisition devices 2 can be excited with synchronous acquisition man-made explosion 1,
And Three Dimensional Ground magnetotelluric data.
With reference to shown in Fig. 4, in above-mentioned Electromagnetism of Earthquake joint exploration system embodiment, if in the nothing laid in two dimensions
Line does not remotely lay man-made explosion and only located level excites electric dipole current source 3 in the surrounding of seismoelectric magnetic data harvester 2 four directions,
Then all wireless remote control Electromagnetism of Earthquake data acquisition devices 2 can be with synchronous acquisition three-dimensional ground micro-seismic data or earthquake
(passiveseismic) data, and level excites the component electromagnetic data of ground five of dipole current source excitation.
If the cubic not cloth around the wireless remote control Electromagnetism of Earthquake data acquisition device laid with two dimension or three dimensional constitution
If controllable electromagnetic field excitation source is not laid in man-made explosion yet, then all wireless remote control data collection stations can with synchronous acquisition two dimension or
3-D natural earthquake (passiveseismic) data, and ground two-dimensional or three-dimensional magnetotelluric data.
The Electromagnetism of Earthquake joint exploration system acquisition of the embodiment of the present invention to geological data and electromagnetic data can enter into
Installed System Memory is stored up, it is also possible to be sent to data processing centre in real time by communication.Also, Electromagnetism of Earthquake joint exploration
The geological data and electromagnetic data for collecting can be processed respectively, it is also possible to Combined Treatment.The Combined Treatment of Electromagnetism of Earthquake data
Can enter row constraint inverting to electromagnetic data with earthquake explanation results, or earthquake and electromagnetic data are carried out to combine anti-
Drill, to realize the joint exploration of earthquake-electromagnetism.
Because the Electromagnetism of Earthquake joint exploration system of the embodiment of the present invention can carry out comprehensive hair transmitting to geologic objective
And excitation, such that it is able to eliminate by the single Source effects for exciting field source to cause, additionally, the joint exploration of earthquake and electromagnetism, also
Production efficiency can be greatly enhanced, the nonuniqueness result that single exploitation method is brought is reduced.
With reference to shown in Fig. 5, to the collecting method bag of the Electromagnetism of Earthquake joint exploration system of the embodiment of the present invention
Include following steps：
Step a, several artificially in focus one artificially focus is excited, either synchronously or asynchronously excite several controllable
A controllable electromagnetic field excitation source in electric field excitation source.
Step b, go out several Electromagnetism of Earthquake joint exploration data acquisition device synchronous acquisitions artificial earthquake source excitations
Seismic signal, several Electromagnetism of Earthquake joint exploration data acquisition devices is either synchronously or asynchronously gathered the controllable electromagnetic field excitation
The electromagnetic signal that source excitation goes out.
Step c, repeat the above steps, until be sequentially completed it is described several can it is artificially all of in focus can be artificially
Epicenter excitation and collection, and it is sequentially completed all of controllable electromagnetic field excitation source in described several controllable electromagnetic field excitation sources
Excite and gather.
Wherein, the concrete condition of Electromagnetism of Earthquake joint exploration system is implemented referring to said system embodiment and said apparatus
Example, will not be repeated here.
The collecting method of the Electromagnetism of Earthquake joint exploration system of the embodiment of the present invention can be carried out entirely to geologic objective
Orientation is launched and is encouraged, such that it is able to eliminate by the single Source effects for exciting field source to cause, additionally, the joint of earthquake and electromagnetism
Exploration, can also be greatly enhanced production efficiency, reduce the nonuniqueness result that single exploitation method is brought.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright, should be understood that and the foregoing is only specific embodiment of the invention, the guarantor being not intended to limit the present invention
Shield scope, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc., should be included in this
Within the protection domain of invention.
Claims (16)
1. a kind of Electromagnetism of Earthquake joint exploration data acquisition device, it is characterised in that the device includes：
One Electromagnetism of Earthquake data collection station, it has a 3-component earthquake detector, or three simple component geophones, its
It is connected with the controller of the Electromagnetism of Earthquake data collection station by corresponding geological data passage, for gathering exploration target area
The simple component or three-component seismic data in domain；
Some groups of orthogonal electric-field sensors, it passes through corresponding electromagnetic data passage with the Electromagnetism of Earthquake data collection station
Controller is connected, two components or three-component electric field data for gathering the exploration targets region；
Three-component magnetic field sensor, it passes through corresponding electromagnetic data passage and is connected with the controller, described for gathering
The three-component magnetic field data in exploration targets region；
The excitaton source of two component or three-component electric field data and the three-component magnetic field data is excited including four levels
Electric dipole current source, four levels excite that electric dipole current source is end to end to surround foursquare four orientation electromagnetism excitation field source；
Two neighboring electric dipole current source current electrode shares an earth electrode during four levels excite electric dipole current source.
2. Electromagnetism of Earthquake joint exploration data acquisition device according to claim 1, it is characterised in that the geological data
Passage and the electromagnetic data passage include：
Preamplifier, for the analog signal for collecting corresponding geophone, electric-field sensor or magnetic field sensor
Preposition enhanced processing is carried out, the analog signal amplified is obtained；
Analog-digital converter, for the analog signal of the amplification to be carried out into analog-to-digital conversion, acquisition is suitable to the controller treatment
Data signal；
Memory, for preserving the data signal under the control of the controller.
3. Electromagnetism of Earthquake joint exploration data acquisition device according to claim 1, it is characterised in that the seismic detection
Device is simulation geophone or digital geophone, and the electric-field sensor is unpolarizable electrode pair, and described magnetic field passes
Sensor is fluxgate type or line of induction ring type magnetic field sensor.
4. Electromagnetism of Earthquake joint exploration data acquisition device according to claim 1, it is characterised in that the electric field sensing
The frequency band range and the frequency band range of the earth or Natural electromagnetic field in the frequency response scope covering controllable electromagnetic field excitation source of device；
And the frequency band range and nagneto-telluric field in the frequency response scope covering controllable electromagnetic field excitation source of the magnetic field sensor
Frequency band range.
5. Electromagnetism of Earthquake joint exploration data acquisition device according to claim 1, it is characterised in that each described earthquake
Data channel and the electromagnetic data passage are each equipped with an independent power supply.
6. Electromagnetism of Earthquake joint exploration data acquisition device according to claim 1, it is characterised in that the Electromagnetism of Earthquake
Data collection station is wireless remote control Electromagnetism of Earthquake data collection station.
7. a kind of Electromagnetism of Earthquake joint exploration system, it is characterised in that the system includes：
Electromagnetism of Earthquake joint exploration data acquisition device described in several claims 1, for gathering controllable electromagnetic field excitation
Source, the electromagnetism and seismic exploration data of Natural electromagnetic field source, artificially focus and the unartificial seismic origin；
Several controllable electromagnetic field excitation sources, it is uniformly distributed around the Electromagnetism of Earthquake joint exploration data acquisition device；
Several artificially focus, it is Electromagnetism of Earthquake joint exploration data acquisition device periphery is uniform or random distribution；
Described several controllable electromagnetic field excitation sources excite electric dipole current source for four levels, and four levels excite dipole current
Source is end to end to surround foursquare four orientation electromagnetism excitation field source；Four levels excite two neighboring in electric dipole current source
Electric dipole current source current electrode shares an earth electrode.
8. Electromagnetism of Earthquake joint exploration system according to claim 7, it is characterised in that four levels excite dipole
The end to end foursquare side ratio exploration targets region strike length for surrounding of current source is big by 10%~20%.
9. Electromagnetism of Earthquake joint exploration system according to claim 7, it is characterised in that when length is moved towards in exploration targets region
When degree is more than preseting length, configures multiple four orientation electromagnetism excitation field sources and cover exploration target area successively.
10. Electromagnetism of Earthquake joint exploration system according to claim 9, it is characterised in that the multiple four orientation electromagnetism
Excite the area that 20% is overlapped between adjacent two four orientation electromagnetism excitation field sources in field source.
11. Electromagnetism of Earthquake joint exploration systems according to claim 7, it is characterised in that described several controllable electromagnetics
Field excitation source excites successively, described each described controllable electric of several Electromagnetism of Earthquake joint exploration data acquisition device synchronous acquisitions
The electromagnetic data that magnetic excitation source excitation is produced.
12. Electromagnetism of Earthquake joint exploration systems according to claim 7, it is characterised in that described several artificial earthquakes
Source excites successively, and artificially focus swashs described several Electromagnetism of Earthquake joint exploration data acquisition device synchronous acquisitions described in each
Send out the geological data for producing.
The collecting method of Electromagnetism of Earthquake joint exploration system described in a kind of 13. claims 7, it is characterised in that including with
Lower step：
A, several artificially in focus one artificially focus is excited, either synchronously or asynchronously excite several controllable electric magnetic fields to swash
A controllable electromagnetic field excitation source in rising；
B, believe the earthquake that several Electromagnetism of Earthquake joint exploration data acquisition device synchronous acquisitions artificial earthquake source excitations goes out
Number, described several Electromagnetism of Earthquake joint exploration data acquisition devices is either synchronously or asynchronously gathered the controllable electromagnetic field excitation source and swash
The electromagnetic signal for sending；
C, repeat the above steps, until being sequentially completed described several artificially all people building site epicenter excitation and ground in focus
Shake data acquisition, and it is sequentially completed swashing for all of controllable electromagnetic field excitation source in described several controllable electromagnetic field excitation sources
Hair and electromagnetic field data collection；Wherein,
Described several controllable electromagnetic field excitation sources excite electric dipole current source for four levels, and four levels excite dipole current
Source is end to end to surround foursquare four orientation electromagnetism excitation field source；Four levels excite two neighboring in electric dipole current source
Electric dipole current source current electrode shares an earth electrode.
The collecting method of 14. Electromagnetism of Earthquake joint exploration systems according to claim 13, it is characterised in that described
Four levels excite the end to end foursquare side ratio exploration targets region strike length for surrounding of electric dipole current source big by 10%
~20%.
The collecting method of 15. Electromagnetism of Earthquake joint exploration systems according to claim 13, it is characterised in that when surveying
When visiting target area strike length more than preseting length, configure multiple four orientation electromagnetism excitation field sources and cover exploration targets successively
Area.
The collecting method of 16. Electromagnetism of Earthquake joint exploration systems according to claim 15, it is characterised in that described
20% area is overlapped in multiple four orientation electromagnetism excitation field sources between two adjacent exploration targets regions.
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