CN113848590B - Geophysical prospecting system and method for seismic surveying - Google Patents
Geophysical prospecting system and method for seismic surveying Download PDFInfo
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- 230000005672 electromagnetic field Effects 0.000 claims abstract description 35
- 230000002452 interceptive effect Effects 0.000 claims abstract description 17
- 230000003993 interaction Effects 0.000 claims abstract description 12
- 238000004458 analytical method Methods 0.000 claims description 49
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- 230000010287 polarization Effects 0.000 claims description 12
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- 230000033558 biomineral tissue development Effects 0.000 description 4
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Abstract
The invention provides a geophysical prospecting system and method for seismic surveying, comprising a central processing module, a natural alternating electromagnetic field, a transmitting module, a positioning module, a collecting module, a data processing module and a database, wherein the central processing module, the transmitting module, the positioning module, the collecting module, the data processing module and the database are all positioned in the natural alternating electromagnetic field, the transmitting module is in interactive connection with the central processing module, and the positioning module is in interactive connection with the central processing module; according to the invention, by utilizing the principle that the resistivity and the impedance phase value between mineral deposits are different, the natural alternating electromagnetic field generated by solar wind and lightning phenomena is utilized, the transmitting module is utilized to transmit electromagnetic interaction signals into the natural alternating electromagnetic field, then the acquisition module is utilized to acquire electromagnetic data of the natural alternating electromagnetic field, and the data processing module is used for processing and comprehensively interpreting the acquired electromagnetic data to form a result chart, so that the seismic surveying method is simple and the imaging efficiency is high.
Description
Technical Field
The invention relates to the technical field of seismic surveying, in particular to a geophysical prospecting system and method for seismic surveying.
Background
Seismic surveys investigate methods of subsurface formation primarily related to the exploration of oil, gas or deposits. The method is based on the time interval between the arrival of an acoustic wave emission and a reflected wave or the arrival of a refracted pulse at one or several seismic detectors;
in the prior art, there is also a major problem with geophysical prospecting systems for seismic surveys:
firstly, in the prior art, a seismic source is often adopted to be matched with instruments such as a detector, and the like, and the seismic survey is carried out by utilizing refractive waves, so that the geophysical prospecting mode is more complex for the seismic survey means;
secondly, the method for processing survey data in the prior art is simpler and has lower accuracy.
To this end, a geophysical prospecting system and method for use in a seismic survey are presented.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a geophysical prospecting system and method for seismic surveying that solves or mitigates the technical problems of the prior art, and at least provides a useful choice.
The technical scheme of the embodiment of the invention is realized as follows: a geophysical prospecting system for seismic surveying, comprising a central processing module, a natural alternating electromagnetic field, a transmitting module, a positioning module, an acquisition module, a data processing module and a database:
the system comprises a central processing module, a transmitting module, a positioning module, an acquisition module, a data processing module and a database, wherein the central processing module, the transmitting module, the positioning module, the acquisition module, the data processing module and the database are all positioned in a natural alternating electromagnetic field, the transmitting module is in interactive connection with the central processing module, the positioning module is in interactive connection with the central processing module, the acquisition module is in interactive connection with the central processing module, the data processing module is in interactive connection with the central processing module, and the data processing module is in interactive connection with the database;
the data processing module comprises a reading module, an inversion analysis module, a forward analysis module and a comparison gate module, wherein the reading module is connected with the inversion analysis module and the forward analysis module, and the inversion analysis module and the forward analysis module are both connected with the comparison module;
the central processing module is used for centrally scheduling the operation of each module and processing data conversion;
the transmitting module is used for transmitting electromagnetic interaction signals into the natural alternating electromagnetic field;
the acquisition module is used for acquiring electromagnetic data of the natural alternating electromagnetic field;
the data processing module is used for processing the acquired electromagnetic data;
the reading module is used for reading electromagnetic information prestored in the database;
the inversion analysis module is used for deducing the distribution attribute of the source from the attribute of the field according to the acquired magnetic field data;
the forward analysis module is used for deducing the distribution attribute of the field from the attribute of the source according to the acquired magnetic field data;
the comparison module is used for comparing the analysis results of the inversion analysis module and the forward analysis module and determining whether the data are accurate or not;
the database is used for storing the processed magnetic field data.
In some embodiments, the geophysical prospecting system further comprises a remediation module comprising a forest compass and a level.
In some embodiments, the acquisition module includes a magnetic probe, an electrical channel acquisition station, a signal receiver, and a non-polarized electrode.
In some embodiments, the positioning module comprises a GPS locator.
A geophysical prospecting method for a seismic survey comprising the steps of:
s1, constructing an acquisition module in a natural alternating electromagnetic field;
s2, the transmitting module transmits electromagnetic interaction signals into the natural alternating electromagnetic field, then electromagnetic data of the natural alternating electromagnetic field are acquired through the acquisition module, and the signals are transmitted to the central processing module;
s3, the central processing module sends the received data signals to the data processing module;
s4, the data processing module reads pre-stored resistance data from the database, processes the received data signals and obtains distribution characteristic data of resistivity of each section;
s5, after the treatment is finished, storing in a database.
In some embodiments, in the step S1, when the acquisition module is constructed, the number of non-polarized electrodes is four, and the four non-polarized electrodes are matched with the magnetic probe and the signal receiver to obtain two groups of resistivity and impedance phases of TE polarization and TM polarization modes, and the magnetic probe signal receiver and the electric channel acquisition station form a multi-station multi-channel wireless local area network acquisition system to acquire field data.
In some embodiments, in the step S2, when the transmitting module transmits the electromagnetic interaction signal into the natural alternating electromagnetic field, the levelness is corrected by the forest compass and the level bar in the correcting module.
In some embodiments, in the step S4, after the data processing module reads the pre-stored resistance data from the database, the data is preprocessed, where the preprocessing of the data includes editing the data, near-field correction and static correction, then qualitative analysis is performed, then forward analysis, two-dimensional inversion and Bostick inversion are performed through the forward analysis module and the inversion analysis module, and finally known geological data is compared through the comparison module, and comprehensive interpretation is performed to form a result map.
By adopting the technical scheme, the embodiment of the invention has the following advantages:
1. according to the invention, by utilizing the principle that the resistivity and the impedance phase value between mineral deposits are different, the natural alternating electromagnetic field generated by solar wind and lightning phenomena is utilized, the transmitting module is utilized to transmit electromagnetic interaction signals into the natural alternating electromagnetic field, then the acquisition module is utilized to acquire electromagnetic data of the natural alternating electromagnetic field, and the data processing module is used for processing and comprehensively interpreting the acquired electromagnetic data to form a result chart, so that the seismic surveying method is simple and the imaging efficiency is high.
2. The invention reads pre-stored resistance data from a database by utilizing a data processing module, then pre-processes the data, wherein the data pre-processes comprise data editing, near-field correction and static correction, then performs qualitative analysis, performs forward analysis, two-dimensional inversion and Bostick inversion by using a forward analysis module and an inversion analysis module, and finally compares known geological data by using a comparison module to comprehensively interpret to form a result graph, and processes the data accurately.
The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become apparent by reference to the drawings and the following detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a system block diagram of the present invention;
FIG. 2 is a schematic diagram of an unpolarized electrode in combination with a magnetic probe and signal receiver for collecting electromagnetic signals in the present invention;
FIG. 3 is a flow chart of the data processing module processing data in the present invention;
FIG. 4 is an inversion chart and an inference interpretation chart of seismic survey data acquired in Experimental example one of the present invention;
FIG. 5 is an inversion chart and an inference interpretation chart of seismic survey data acquired in Experimental example one of the present invention.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1-5, an embodiment of the present invention provides a geophysical prospecting system for a seismic survey, comprising a central processing module, a natural alternating electromagnetic field, a transmitting module, a positioning module, an acquisition module, a data processing module, and a database:
the system comprises a central processing module, a transmitting module, a positioning module, an acquisition module, a data processing module and a database, wherein the central processing module, the transmitting module, the positioning module, the acquisition module, the data processing module and the database are all positioned in a natural alternating electromagnetic field, the transmitting module is in interactive connection with the central processing module, the positioning module is in interactive connection with the central processing module, the acquisition module is in interactive connection with the central processing module, the data processing module is in interactive connection with the central processing module, and the data processing module is in interactive connection with the database;
the data processing module comprises a reading module, an inversion analysis module, a forward analysis module and a comparison gate module, wherein the reading module is connected with the inversion analysis module and the forward analysis module, and the inversion analysis module and the forward analysis module are both connected with the comparison module;
the central processing module is used for centrally scheduling the operation of each module and processing data conversion;
the transmitting module is used for transmitting electromagnetic interaction signals into the natural alternating electromagnetic field;
the acquisition module is used for acquiring electromagnetic data of the natural alternating electromagnetic field;
the data processing module is used for processing the acquired electromagnetic data;
the reading module is used for reading the electromagnetic information prestored in the database;
the inversion analysis module is used for deducing the distribution attribute of the source from the attribute of the field according to the acquired magnetic field data;
the forward analysis module is used for deducing the distribution attribute of the field from the attribute of the source according to the acquired magnetic field data;
the comparison module is used for comparing the analysis results of the inversion analysis module and the forward analysis module and determining whether the data are accurate or not;
and the database is used for storing the processed magnetic field data.
In one embodiment, the geophysical prospecting system further comprises a correcting module, the correcting module comprises a forest compass and a level, the field data acquisition uses unpolarized electrodes, and electrode pairs meeting the requirements are strictly selected for working. When the device is arranged, a measuring rope is used for distance measurement, a forest compass is used for angle measurement, the respective azimuth deviation is not more than 1 degree, the polar distance error is less than 1%, the magnetic rod takes the magnetic north direction as the reference direction, tools such as the forest compass and a level bar are used for arrangement, the correct azimuth and the placement level of the magnetic rod are ensured, and the device is beneficial to improving the accuracy of geophysical prospecting.
In one embodiment, the acquisition module comprises a magnetic probe, a channel acquisition station, a signal receiver and a non-polarized electrode, and adopts a four-component measuring point AMT device to acquire two groups of resistivity and impedance phase of TE polarization and TM polarization modes, so as to perform qualitative and quantitative analysis and finally obtain the distribution characteristics of the resistivity of each section in the research area. In view of the fact that the magnetic field is stable in a certain area, common magnetic references are adopted in the range of 500m, namely, magnetic field data of one four-component measuring point can be used for two-component measuring points in the range of 500m around, on one hand, the condition that each point is inconsistent due to movement of a probe can be avoided, on the other hand, construction efficiency can be improved, and the requirement on the exploration precision of an AMT can be met.
In one embodiment, the positioning module includes a GPS locator that determines position information between points in the magnetic field.
A geophysical prospecting method for a seismic survey comprising the steps of:
s1, constructing an acquisition module in a natural alternating electromagnetic field;
s2, the transmitting module transmits electromagnetic interaction signals into the natural alternating electromagnetic field, then electromagnetic data of the natural alternating electromagnetic field are acquired through the acquisition module, and the signals are transmitted to the central processing module;
s3, the central processing module sends the received data signals to the data processing module;
s4, the data processing module reads pre-stored resistance data from the database, processes the received data signals and obtains distribution characteristic data of resistivity of each section;
s5, after the treatment is finished, storing in a database.
In one embodiment, in the step S1, when the acquisition module is constructed, the number of non-polarized electrodes is four, and the four non-polarized electrodes are matched with the magnetic probe and the signal receiver to acquire two groups of resistivity and impedance phases of TE polarization and TM polarization modes, and the magnetic probe signal receiver and the electric channel acquisition station form a multi-station multi-channel wireless local area network acquisition system to acquire field data.
In one embodiment, in S2, when the transmitting module transmits the electromagnetic interaction signal into the natural alternating electromagnetic field, the levelness is corrected by the forest compass and the level bar in the correcting module.
In one embodiment, in S4, after the data processing module reads the pre-stored resistance data from the database, the data is preprocessed, the data preprocessing includes data editing, near-field correction and static correction, then qualitative analysis is performed, then forward analysis, two-dimensional inversion and Bostick inversion are performed through the forward analysis module and the inversion analysis module, finally known geological data is compared through the comparison module, and comprehensive interpretation is performed to form a result map.
Experimental example
The invention also provides experimental data of seismic survey for a certain place by adopting the geophysical prospecting system and the geophysical prospecting method:
as shown in fig. 4-5, a certain section is a test section for electromagnetic sounding at this time, four non-polarized electrodes are adopted to cooperate with a magnetic probe and a signal receiver to obtain two groups of resistivity and impedance phases of TE polarization and TM polarization modes, the magnetic probe signal receiver and a channel acquisition station form a multi-station multi-channel wireless local area network acquisition system to acquire field data, the acquired data is processed by a data processing module, and after the data processing module reads pre-stored resistance data from a database, the data is preprocessed: editing data, correcting near field and correcting statically, then carrying out qualitative analysis, carrying out forward analysis, two-dimensional inversion and Bostink inversion through a forward analysis module and an inversion analysis module, and finally comparing known geological data through a comparison module, and comprehensively explaining to form a result diagram, wherein the result diagram is shown in figure 4.
The analysis of FIGS. 4-5 is as follows:
resistivity values of different geological bodies (tuff, sand slate and the like) on a certain section are displayed as different spatial abnormal morphology spreads; the method is characterized in that irregular low-resistance anomalies are formed on the sandstone rock mass, the resistivity value is concentrated below 200Ω & m, the limestone mass is a main mineralization zone, the mineralization zone is often positioned on a gradient change zone between the low-stop zone and the high-stop zone, the resistivity of the shallow part of the geological mass is relatively higher than that of the deep part, the resistivity is sequentially weakened towards the deep part, the resistivity value is concentrated at 300-800Ω & m, the characteristic features of the relative resistance are shown, the characteristic features of the relative high-resistance anomalies are shown at the earth surface of measuring points No. 7-15 on the north side of the section, the numerical value is larger, and the mining area is presumed to be a tailing accumulation area by combining the earth surface geological investigation working result.
The obvious relative medium resistance abnormality exists in the middle part of a certain section, and the medium resistance abnormality is presumed to be a main basic volcanic rock mineralization zone such as tuff; the inclination angle of the shallow part is steeper, the deep part is approximately vertical, the abnormality is presumed to be an ore body or caused by the ore body, the form of spreading the abnormality to the deep part is better, and a more obvious second ore forming space exists; the mineralized body has a fault fracture zone between No. 21 and No. 22 measuring points, and the resistivity is expressed as a high-low resistance abnormal contact zone, so that the F1 structural fracture zone is further demonstrated to be a main structural mineral zone in the research area.
Finally, in connection with fig. 4-5, the conclusion is that: some exploration line is mainly located at the 15 # ore body, and penetrates through the 15 # ore body vertically in the North west direction. Resistivity values of different geological bodies (clastic rock, limestone, basic volcanic rock segments and the like) on a certain exploration line are displayed as different spatial abnormal morphological spreads; as can be seen from the cross-sections of fig. 4-5, there is a distinct relatively resistant anomaly in the middle of the cross-section, presumably the principal structural fracture mineralization zone, with a steeper shallow dip angle and a nearly vertical deep, presumably the anomaly is likely to be or be caused by ore bodies, and a better spreading pattern to the deep, and a more distinct second mineral formation space exists.
The invention works when in work: the invention utilizes the principle that the resistivity and the impedance phase value between mineral deposits are different, utilizes the natural alternating electromagnetic field generated by solar wind and thunder phenomena to emit electromagnetic interaction signals into the natural alternating electromagnetic field by utilizing an emission module, then utilizes an acquisition module to acquire electromagnetic data of the natural alternating electromagnetic field, and a data processing module processes the acquired electromagnetic data to comprehensively interpret to form a result chart.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that various changes and substitutions are possible within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A geophysical prospecting system for seismic surveying, comprising a central processing module, a natural alternating electromagnetic field, a transmitting module, a positioning module, an acquisition module, a data processing module and a database, and being characterized in that:
the system comprises a central processing module, a transmitting module, a positioning module, an acquisition module, a data processing module and a database, wherein the central processing module, the transmitting module, the positioning module, the acquisition module, the data processing module and the database are all positioned in a natural alternating electromagnetic field, the transmitting module is in interactive connection with the central processing module, the positioning module is in interactive connection with the central processing module, the acquisition module is in interactive connection with the central processing module, the data processing module is in interactive connection with the central processing module, and the data processing module is in interactive connection with the database;
the data processing module comprises a reading module, an inversion analysis module, a forward analysis module and a comparison module, wherein the reading module is connected with the inversion analysis module and the forward analysis module, and the inversion analysis module and the forward analysis module are both connected with the comparison module;
the central processing module is used for centrally scheduling the operation of each module and processing data conversion;
the transmitting module is used for transmitting electromagnetic interaction signals into the natural alternating electromagnetic field;
the acquisition module is used for acquiring electromagnetic data of the natural alternating electromagnetic field;
the data processing module is used for processing the acquired electromagnetic data;
the reading module is used for reading electromagnetic information prestored in the database;
the inversion analysis module is used for deducing the distribution attribute of the source from the attribute of the field according to the acquired magnetic field data;
the forward analysis module is used for deducing the distribution attribute of the field from the attribute of the source according to the acquired magnetic field data;
the comparison module is used for comparing the analysis results of the inversion analysis module and the forward analysis module and determining whether the data are accurate or not;
the database is used for storing the processed magnetic field data;
the acquisition module comprises a magnetic probe, an electric channel acquisition station, a signal receiver and non-polarized electrodes, the number of the non-polarized electrodes is four, the four non-polarized electrodes are matched with the magnetic probe and the signal receiver to acquire two groups of resistivity and impedance phases of TE polarization and TM polarization modes, and the magnetic probe, the signal receiver and the electric channel acquisition station form a multi-station multi-channel wireless local area network acquisition system to acquire field data.
2. A geophysical prospecting system for a seismic survey according to claim 1, wherein: the geophysical prospecting system further comprises a correcting module, and the correcting module comprises a forest compass and a level.
3. A geophysical prospecting system for a seismic survey according to claim 1, wherein: the positioning module comprises a GPS locator.
4. A geophysical prospecting method for a seismic survey, comprising the steps of:
s1, building an acquisition module in a natural alternating electromagnetic field, wherein the number of non-polarized electrodes is four when the acquisition module is built, the four non-polarized electrodes are matched with a magnetic probe and a signal receiver to acquire two groups of resistivity and impedance phases of TE polarization and TM polarization modes, and the magnetic probe signal receiver and an electric channel acquisition station form a multi-station multi-channel wireless local area network acquisition system to acquire field data;
s2, the transmitting module transmits electromagnetic interaction signals into the natural alternating electromagnetic field, then electromagnetic data of the natural alternating electromagnetic field are acquired through the acquisition module, and the signals are transmitted to the central processing module;
s3, the central processing module sends the received data signals to the data processing module;
s4, the data processing module reads pre-stored resistance data from the database, pre-processes the data, the data pre-processing comprises data editing, near-field correction and static correction, then qualitative analysis is carried out, forward analysis, two-dimensional inversion and Bostick inversion are carried out through the forward analysis module and the inversion analysis module, finally known geological data are compared through the comparison module, and comprehensive interpretation is carried out to form a result diagram;
s5, after the treatment is finished, storing in a database.
5. A geophysical prospecting method for a seismic survey according to claim 4, wherein: in the step S2, when the transmitting module transmits electromagnetic interaction signals into the natural alternating electromagnetic field, levelness is corrected through the forest compass and the level bar in the correcting module.
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