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61 results about "Magnetotelluric sounding" patented technology
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Three dimension visual method based on geological body of geophysical field data
InactiveCN101051395AWide range of applicationsExtensive developmentElectric/magnetic detection3D-image renderingArray data structureStatistical analysis
The present invention discloses a geologic body three-dimensional visualization method based on geophysical field data. Said method includes the following steps: (A), fetching collected geophysical field data, making fetched data be stored as object array, and statistically analyzing the fetched data so as to obtain space distribution characteristics of fetched data; (B), according to the space distribution characteristics of data combining data points in the object array and constructing them into concrete space polygonal mode; and (c), drawing and displaying said constructed space polygonal model, and making said space polygonal model undergo the process of visualization operation treatment.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
3D resistivity cascaded automatic imaging method
ActiveCN101008678AReduce cumbersomeImprove objectivityElectric/magnetic detectionAcoustic wave reradiationElectricityObject structure
This invention relates to earth physical exploring technique, which is of large earth electrical magnetic exploring data 3D resistance automatic imaging method, which comprises the following steps: using regular electrical magnetic exploring method to test and record area data; adopting the exploring two electrodes direction resistance rate and phase curve for insert value and induce with each image result as next reduce base near to aim object structure imaging.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
One-dimensional joint inversion method for time-frequency electromagnetic data and magnetotelluric data
ActiveCN104280782AElectric/magnetic detectionAcoustic wave reradiationImage resolutionInversion Time
The invention discloses a one-dimensional joint inversion method for time-frequency electromagnetic data and magnetotelluric data. The transmitting frequency of the joint inversion time-frequency electromagnetism ranges from 0.025 Hz to 100 Hz, the frequency of the magnetotelluric sounding ranges from 0.0005 Hz to 320 Hz, the distances between all time-frequency electromagnetic measuring points and all magnetotelluric measuring points are calculated, the nearest magnetotelluric measuring point is obtained, data of the magnetotelluric measuring point are extracted, a joint inversion Jacobian partial derivative matrix of the time-frequency electromagnetism and the magnetotelluric sounding is calculated, a target function is calculated according to the regularization inversion principle, the target function is minimized through the conjugate gradient iterative algorithm, and when the fitting error of the target function reaches the set error standard or the iterations exceed the set maximum iteration number, the joint inversion is finished. According to the one-dimensional joint inversion method, the underground dielectric resistivity distribution below a measuring line can be obtained, the interpretation requirements for structures, faults and entrapments can be met, and the joint inversion result shows that the resolution from shallow to deep is higher than the resolution of the inversion result obtained by independently using time-frequency electromagnetic data.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Magnetic reference processing method for acquiring data in three dimensions audio-frequency magnetotelluric sounding
InactiveCN104656156AAchieving Independent AcquisitionImprove work efficiencyElectric/magnetic detectionAcoustic wave reradiationObservation pointElectromagnetic field
The invention discloses a magnetic reference processing method for acquiring data in three dimensions through audio-frequency magnetotelluric sounding. The method can be used for acquiring high-quality electromagnetic field data. The method comprises the following steps: three-dimensional observation is conducted; observation points are distributed as a rectangular net on a rugged topography surface; a net observation density is defined according to an exploration proportional scale and the requirement of exploration depth; an electric channel is observed and a magnetic field component value is calculated at each observation point; the Cagniard resistivity corrected by the observation points is calculated by using the magnetic reference data. The magnetic reference processing method can be used for improving the working efficiency, independently collecting magnetic channels and electric channels and acquiring high-quality electromagnetic field data.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Three-dimensional magnetotelluric anisotropy inversion method based on non-structural finite element method
ActiveCN113221393ASave memoryDesign optimisation/simulationSpecial data processing applicationsMagnetic anisotropyComputational model
The invention discloses a three-dimensional magnetotelluric anisotropy inversion method based on a non-structural finite element method. The three-dimensional magnetotelluric anisotropy inversion method comprises the following steps: (1) obtaining and screening magnetotelluric sounding data with anisotropic characteristics for inversion; (2) constructing a conductivity tensor model by adopting a non-structural finite element method; (3) constructing a magnetotelluric regularization inversion objective function under the anisotropic medium condition; (4) performing forward modeling on the conductivity tensor model to obtain a predicted total impedance tensor corresponding to model response, and calculating a product of transpose and a vector of a sensitivity matrix along with forward modeling; (5) calculating the gradient of the magnetotelluric regularization inversion objective function; (6) calculating a model parameter update quantity by adopting an L-BFGS algorithm, and updating the model parameters according to the model parameter update quantity; (7) iteratively executing the step (4) to the step (6) until an iteration termination condition is reached, obtaining a parameter-optimized conductivity tensor model, and realizing three-dimensional magnetotelluric anisotropy inversion.
Owner:JILIN UNIV
Method for calculating three-dimensional magnetotelluric sounding main impedance
ActiveCN105204078AEliminate the effects ofImprove applicabilityElectric/magnetic detectionSpecial data processing applicationsTime domainShale gas
The invention provides a method for calculating the three-dimensional magnetotelluric sounding main impedance, and belongs to the field of electromagnetic exploration of geological exploration and underground mineral resource exploration such as petroleum, natural gas, and shale gas etc. The method includes: (1) acquiring time domain recording data obtained via field acquisition, wherein the data comprising an electric field and a magnetic field in the mutual vertical direction, namely ex (t), ey (t), hx (t), and hy (t), and t referring to time; (2) performing conversion of the time domain recording data in step (1) from time domain to frequency domain; (3) calculating the tensor impedance original value and performing editing processing of the original value; (4) calculating a correct coordinate rotation angle theta0; (5) calculating the main impedances a and b in the three-dimensional construction condition; (6) calculating three-dimensional scattering tensor factors e, lambda1, and lambda2; and (7) giving a calculating result of the coordinate rotation angle theta0, a three-dimensional scattering tensor factor C, and the main impedance Z0.
Owner:CHINA PETROLEUM & CHEM CORP +1
Geological data analysis modeling method
InactiveCN107037492AImprove applicabilityEasy to operateElectric/magnetic detectionAcoustic wave reradiationLithologyImage resolution
The present invention provides a geological data analysis and modeling method, comprising the following steps: ①Qualitative analysis: for the processed audio magnetotelluric sounding data, use two-dimensional deviation analysis, electrical main axis feature analysis, and polarization feature analysis respectively , Magnetic induction vector feature analysis and quasi-section map feature analysis are analyzed in at least three ways to obtain geological section data; ②AMT inversion: perform nonlinear conjugate gradient NLCG two-dimensional inversion on geological section data; ③Model establishment: according to the above According to the obtained data, according to the principle of continuous drilling, geological profile, lithology data and resistivity contour line, the section is electrically stratified. Combined to establish a geological and geophysical prospecting model. The beneficial effect of the invention is that: through qualitative analysis, AMT inversion and model building, a set of analytical methods with strong applicability, easy operation and system are provided for geological exploration of ore deposits.
Owner:贵州省地质矿产勘查开发局一0三地质大队
Method for judging grade of tunnel surrounding rock based on magnetotelluric sounding resistivity
PendingCN110968840AImprove applicabilityOvercome errorElectric/magnetic detectionComplex mathematical operationsSeismic waveWave velocity
The invention discloses a method for judging the grade of tunnel surrounding rock based on magnetotelluric sounding resistivity. The method comprises the following steps: (1), building a correspondingrelation model of the grade of tunnel surrounding rock and a resistivity interval according to a tunnel surrounding rock grade and a tunnel body resistivity value sample of a known region; (2) acquiring a resistivity value of a to-be-graded region; and (3) obtaining the tunnel surrounding rock grade of the to-be-graded area according to the resistivity of the to-be-graded area obtained in the step (2) and the corresponding relation model between the tunnel surrounding rock grade and the resistivity interval established in the step (1). The technical scheme has high applicability and quantification, overcomes the error problem of field investigation and manual judgment, overcomes the defect that continuous calculation cannot be performed when the wave velocity of the drilled hole is determined, overcomes the difficulty in solving the seismic wave velocity, can judge the surrounding rock grade according to the geodetic sounding resistivity, and provides a reliable basis for surroundingrock grading for tunnel design.
Owner:CHINA RAILWAY DESIGN GRP CO LTD
Hidden polymetallic ore prospecting method
InactiveCN110118995AAchieving a breakthrough in prospectingAccurately identify hidden depositsElectric/magnetic detectionAcoustic wave reradiationHigh resistanceCopper
The invention discloses a hidden polymetallic ore prospecting method. The method utilizes a rock debris geochemistry, a induced electric medium gradient scanning surface and a controllable source audio magnetotelluric sounding method to explore a hidden polymetallic ore bed controlled by a fracture structure, firstly selects a favorable polymetallic ore mining area according to a geological miningrule, and then utilizes the rock debris geochemistry measurement and defines a multi-element combined abnormal group; then, in the multi-element combined abnormal group area, an occurrence area of the polymetallic ore is defined by utilizing the induced electric medium gradient scanning surface; and finally, in the occurrence area of the polymetallic ore, the high-resistance mineralization and alteration zone is defined by utilizing the controllable source audio magnetotelluric sounding measurement. The hidden polymetallic ore prospecting method has the characteristics of accurate position identification of the blind deposit and obvious prospecting effect. By adopting the method, the prospecting breakthrough of the tin-silver-zinc-copper-lead polymetallic ore hidden under loose sedimentsis realized in the Baiyin Chagan Dongshan mining area of the Inner Mongolia Autonomous Region.
Owner:山东省地质矿产勘查开发局第六地质大队
Rare metal ore deposit prospecting method based on geological and geophysical technologies
InactiveCN109991681AClear designReflect holistic thinkingGeological measurementsHigh resistanceEarth surface
The invention provides a rare metal ore deposit prospecting method based on geological and geophysical technologies. Overlapped areas of structure intersection positions, mesozoic igneous rock bodies,high gravity value anomalies, and medium and high magnetic anomalies in province ranges are delineated as metallogenic prospect areas. Through combination of a rock geochemistry anomaly graph, metallogenic target areas of rare metal ore deposits are further delineated. An induced polarization method and high precision magnetic measurement are carried out in the target areas. Isolines of earth surface apparent resistivity and relative magnetic field values are drawn on a map. Overlapped areas of high apparent resistivity and high magnetic field values are delineated as metallogenic enriched sections. Audio magnetotelluric sounding and radon gas radioactive detection are carried out in the sections. Space distribution states of the ore deposits in the sections are delineated according to characteristics of high resistance, high gravity, high magnetic force and high radon gas. Suitable positions are selected for explosion of ore bodies. According to the method, through combination of thegeophysical technology, an ore body is precisely positioned, and a macroscopic to microscopic step-by-step prospecting ideal is embodied.
Owner:湖南省地质调查院
Interlayer oxidation zone sandstone type uranium deposit favorable target area space location method
InactiveCN106842333AAccurate spatial positioningElectric/magnetic detectionAcoustic wave reradiationBody identificationOxidation-Reduction Agent
The invention belongs to the technical fields of uranium prospecting and geophysical exploration, particularly to an interlayer oxidation zone sandstone type uranium deposit favorable target area space location method. The interlayer oxidation zone sandstone type uranium deposit favorable target area space location method comprises the following steps of in key working areas, determining favorable metallogenic sections through telluric electromagnetic sounding; for the favorable metallogenic sections, outlining a redox transitional zone range through high-accuracy ground magnetic survey scanning; outlining the front line of a redox zone; primarily determining a favorable metallogenic area, performing electromagnetic measurement and fine sand body identification to outline target sand bodies in a longitudinal direction; according to the outlined redox transitional zone range and the longitudinal distribution of the target sand bodies, outlining a favorable metallogenic target area. The interlayer oxidation zone sandstone type uranium deposit favorable target area space location method solves the technical problem that the prior art cannot achieve accurate space location of uranium deposit, and by combining with the redox transitional zone range and the longitudinal distribution of the target sand bodies, can achieve accurate space location of interlayer oxidation zone sandstone type uranium deposit, thereby being significant sandstone type uranium deposit prospecting.
Owner:BEIJING RES INST OF URANIUM GEOLOGY
Three-dimensional magnetotelluric tipper inversion method using nonlinear conjugate gradients
ActiveCN104123455AGuaranteed calculation accuracyImprove computing efficiencyElectric/magnetic detectionSpecial data processing applicationsData differencingModel modification
The invention provides a three-dimensional magnetotelluric tipper inversion method using nonlinear conjugate gradients and belongs to the technical field of magnetotelluric sounding. The method comprises steps as follows: S1, inputting data and performing ranking; S2, distributing the parameter of each frequency point to all cpus for tipper inversion and computing; S3, stopping parallel computing and combining the data, and comparing the difference between an invention result and the input date; S4, distributing the data difference and the parameter of each frequency point to all cpus for parallel computing of objective function gradients, computing the search direction p and the step length a and accordingly obtaining a model modification amount; S5, updating a module according to the model modification amount and stopping iteration when an objective function is one hour enough, otherwise, using a new model to repeat the steps from S2 to S5. According to the inversion method, tipper three-dimensional inversion is realized on the basis of tipper data by introducing a nonlinear conjugate gradient method, and the invention result approaches to real underground three-dimensional electrical structure information greatly; the method adopts a parallel computing structure, and the computing efficiency is improved.
Owner:INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
Comprehensive geophysical and geochemical exploration method for delineating sandstone type uranium ore deep three-dimensional uranium mineralization target area
ActiveCN111045110AGuarantee technical feasibilityCircle fastPreparing sample for investigationEarth material testingMetallogenyRadon gas
The invention belongs to the technical field of uranium ore exploration, and particularly relates to a comprehensive geophysical and chemical exploration method for delineating a sandstone type uranium ore deep three-dimensional uranium mineralization target area. The method comprises the following steps: step 1, delineating an abnormal range of uranium content in fine-grained soil; step 2, carrying out aviation transient electromagnetic measurement, and delineating a favorable sand body range of uranium mineralization; 3, delineating a uranium mineralization key exploration area; 4, carryingout soil radon gas measurement, and delineating the abnormal range of the soil radon gas concentration; 5, carrying out controllable source audio magnetotelluric sounding, and delineating a deep uranium mineralization favorable sand body range; step 6, delineating a deep uranium mineralization favorable section; step 7, delineating a geoelectrochemical uranium content abnormal range; step 8, delineating a deep three-dimensional uranium mineralization favorable sand body range; and step 9, delineating a deep three-dimensional uranium mineralization target area. The method can solve the problemthat in the prior art, it is difficult to accurately delineate the sandstone type uranium ore deep three-dimensional uranium mineralization target area.
Owner:BEIJING RES INST OF URANIUM GEOLOGY
Multi-polarization magnetotelluric sounding method
ActiveCN110488365AImprove shallow detection accuracyImprove reliabilityDetection using electromagnetic wavesAcoustic wave reradiationElectric fieldCommon point
The invention discloses a multi-polarization magnetotelluric sounding method, which comprises the following steps: at each measuring point, with the measuring point as the center, setting a pluralityof pairs of electrodes in the direction of a measuring line and the direction vertical to the measuring line, and observing electric fields in the x and y directions; setting magnetic rods in the x direction and the y direction vertical to the measuring line and observing magnetic fields in the x and y directions; observing multi-electrode-spacing electric fields and magnetic fields simultaneouslyand obtaining a magnetic field actually-measured time sequence and an electric field actually-measured time sequence; and carrying out data processing on the magnetic field actually-measured time sequence and the electric field actually-measured time sequence to finish common-point same-frequency multi-polarization magnetotelluric sounding. The multi-polarization magnetotelluric sounding method can carry out common-point same-frequency multi-electrode-spacing sounding, and can weaken the static effect caused by a surface heterogeneous body through data processing, thereby improving detectionaccuracy of complex and irregular three-dimensional geological bodies; and the method is high in reliability and is simple and convenient.
Owner:HUNAN WUWEI GEOLOGICAL SCI & TECH CO LTD
Sedimentary basin basement top surface form recovery and deep ore body location and prediction new method
InactiveCN108459358AImprove accuracyOvercoming non-intuitiveGeological measurementsBasementMineral Sources
The present invention discloses a sedimentary basin basement top surface form recovery and deep ore body location and prediction new method. The method comprises the following steps of: the step 1: atypical exploration line profile construction petrography catalog stage; the step 2: a typical exploration line profile voice frequency telluric electromagnetic sounding measurement stage; the step 3:on-surface developed area AMT profile measurement; and the step 4: a deep buried ore and rich and thick ore body location and prediction and key target area delineation stage. The sedimentary basin basement top surface form recovery and deep ore body location and prediction new method belongs to the technical field of mineral resource exploration. The method performs construction petrography catalog, voice frequency telluric electromagnetic sounding measurement and electrical resistivity parameter measurement of the typical exploration line profile system, a priori model formed by employing construction petrography catalog is employed to perform comparison and verification of voice frequency telluric electromagnetic sounding 1D and 2D inversion sections to determine an electrical structure surface between the basin basement structural layer and a cover layer and perform on-surface extension on this basis so as to accurately extract and recover the basin basement top surface form features.
Owner:有色金属矿产地质调查中心
Magneto-telluric field static displacement correcting method based on inversion model
ActiveCN104267443ARealize static displacement correction inversionEasy to useElectric/magnetic detectionSpecial data processing applicationsElectrical resistance and conductanceHigh resistance
The invention discloses a magneto-telluric field static displacement correcting method based on an inversion model, and belongs to the technical field of data processing of a telluric electromagnetic sounding method. The correcting method comprises the following steps that a high resistance body or a low resistance body with a shallow copy assigned to generalized static displacement electrical resistivity is added in a designed inversion initial model, in other words, the model grid electrical resistivity corresponding to a measurement point with static displacement is assigned to the generalized static displacement electrical resistivity to participate in inversion, accordingly, the static displacement of the measurement point is corrected, and the inversion result with the static displacement correction effect is obtained. The resistivity of the high resistance body is larger than that of the background, and the resistivity of the low resistance body is smaller than that of the background. According to the correcting method, the magneto-telluric field static displacement correcting is carried out on the basis of a three-dimensional theory, the corrected result is closer to the actual underground electrical structure, and information is more accurate. The static displacement correcting is achieved by designing the original model, the static correction implementing complexity is lowered, and zero-cost working is achieved.
Owner:INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
Method and device for estimating magnetotelluric parameters
ActiveCN104570131ACancel noiseReduce adverse effectsElectric/magnetic detectionAcoustic wave reradiationElectromagnetic fieldFour component
The invention discloses a method and a device for estimating magnetotelluric parameters, and belongs to the technical field of magnetotelluric sounding. The method comprises the steps that electromagnetic field frequency domain signals of four components are acquired, wherein the four components include an x-direction electric field, a y-direction electric field, an x-direction magnetic field and a y-direction magnetic field, and the electromagnetic field frequency domain signal of each component comprises a plurality of electromagnetic field frequency domain signals; power spectra of the electromagnetic field frequency domain signals of the four components are determined, wherein the electromagnetic field frequency domain signal of the same component has a plurality of auto-power spectra, and the electromagnetic field frequency domain signals of the two same components have a plurality of cross-power spectra; an iterative initial value of impedance and an iterative initial value of admittance are determined by adopting a median filtering algorithm; iteration is performed for several times on the power spectra by adopting the iterative initial value of the impedance and the iterative initial value of the admittance; a mean of the power spectra and updated impedance and admittance are obtained; and the mean of the power spectra and the updated impedance and admittance are output as the magnetotelluric parameters. The method improves the estimation accuracy.
Owner:NO 722 RES INST OF CHINA SHIPBUILDING IND
Method for detecting an occurrence zone of a mantle diapir finger location
InactiveUS20070213937A1Shorten the timeImprove reliabilityDispersed particle separationProspecting/detection of underground/near-surface gasesSilanesMining industry
The invention covers the mining industry. Detection method of the occurrence zone of the mantle substance diapir finger consisting in that that geological observation are carried out in riftzones banked up by diapirs of the abnormal mantle and places of location of the mantle substance finger in the earth's crust are determined. Based on the presence of influence traces of silanes streams upon the rock and / or presence of separate ridges having the length up to 200 km by the width of up to 20 km and / or based on the blast traces of silanes and / or presence of scoria cones, differing by that that the correspondence of 3He / 4He from gases sampled from sources of 10−5 order is additionally determined for determination of silicides at the small depth as physical parameters for the location of the mantle substance diapir finger in the earth's crust. The presence of high semiconductor conductivity, locality and activity of magnetic anomalies and anomalies of gravity field is additionally established. The occurrence depth of silicides is determined by magnetotelluric sounding and / or seismic reflection and refraction methods.
Owner:LARIN VLADIMIR NIKOLAEVICH +1
Active field compensation type digital ultralow frequency electromagnetic sensor
ActiveCN105629315AHigh local test accuracyAvoid influenceDetection using electromagnetic wavesEngineeringActive compensation
The invention discloses an active field compensation type digital ultralow frequency electromagnetic sensor, consisting of a sensor seal head, an SD card groove, a collection instrument cabin, a cushion block, an induction coil group, a sensor housing, a sensor shielding layer, and a magnetic core rod support. The invention utilizes a high performance CPU as a main controller, realizes the high accuracy data collection under a condition of low frequency and weak signal and stores the collected data into the SD card. The CPU starts up the active compensation system according to the real-time measurement temperature and vibration data in the data collection process, performs real-time automatic compensation on the collected signal, and effectively overcomes the affect on the test data due to the environment temperature and vibration. The invention has advantages of compensating the capability width and digitalized output.
Owner:JILIN UNIV +2
Static effect correction method and system based on magnetotelluric sounding
ActiveCN111352163AQuality assuranceDoes not cut underground real anomaliesElectric/magnetic detectionAcoustic wave reradiationAlgorithmPrincipal component analysis
The invention relates to a static effect correction method and system for magnetotelluric sounding. The correction method comprises the following steps: acquiring a magnetotelluric signal to be processed, wherein the magnetotelluric signal comprises five mutually orthogonal to-be-processed signals, and performing empirical mode decomposition on each to-be-processed signal to obtain a multi-order intrinsic mode function component corresponding to each to-be-processed signal; according to the multi-order intrinsic mode function component corresponding to each to-be-processed signal, determininga multi-order principal component of each to-be-processed signal by adopting a principal component analysis method; determining an effective signal component of each to-be-processed signal by adoptinga canonical correlation analysis method according to the multi-order principal components of all the to-be-processed signals; and reconstructing according to the effective signal component of each path of to-be-processed signal to obtain each path of corrected to-be-processed signal. According to the method, the static effect can be corrected, and the quality of the reconstructed signal is improved.
Owner:JILIN UNIV
Non-planar wave identification method and system for controllable source audio magnetotelluric sounding
InactiveCN113156520AThe inversion result is accurateElectric/magnetic detectionAcoustic wave reradiationObservation dataComputational physics
The invention provides a non-planar wave identification method and system for controllable source audio magnetotelluric sounding. The method comprises the following steps: performing forward modeling on a two-layer model and a four-layer model in a uniform half-space model to obtain CSAMT observation data; comparing the data curve observed by the CSAMT corresponding to each model with the data curve corresponding to the MT; determining the reaction of the CSAMT observed data curve corresponding to each model to the shallow stratum, and further determining the change form of the observed data along with the frequency; and identifying the non-plane wave according to the relationship between the change form of the observed data corresponding to each model along with the frequency and the response of the non-plane wave. According to the method, the transition region and the near region of the non-plane wave can be correctly identified and divided, and a correct inversion result is obtained.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Method for detecting an occurrence zone of a mantle diapir finger location
InactiveUS7403858B2Improve reliabilityDispersed particle separationProspecting/detection of underground/near-surface gasesSilanesMining industry
The invention covers the mining industry. Detection method of the occurrence zone of the mantle substance diapir finger consisting in that that geological observation are carried out in riftzones banked up by diapirs of the abnormal mantle and places of location of the mantle substance finger in the earth's crust are determined. Based on the presence of influence traces of silanes streams upon the rock and / or presence of separate ridges having the length up to 200 km by the width of up to 20 km and / or based on the blast traces of silanes and / or presence of scoria cones, differing by that that the correspondence of 3He / 4He from gases sampled from sources of 10−5 order is additionally determined for determination of silicides at the small depth as physical parameters for the location of the mantle substance diapir finger in the earth's crust. The presence of high semiconductor conductivity, locality and activity of magnetic anomalies and anomalies of gravity field is additionally established. The occurrence depth of silicides is determined by magnetotelluric sounding and / or seismic reflection and refraction methods.
Owner:LARIN VLADIMIR NIKOLAEVICH +1
Geochemical prospecting combination method for delineating sandstone-type uranium ore-prospecting prospecting area in coverage area
PendingCN112578474AAvoid blindnessSpeed up the processElectric/magnetic detectionRadiation intensity measurementMetallogenyGeological survey
Owner:核工业二〇八大队
Telluric electromagnetic sounding data transmission and monitoring method based on Internet of Things
InactiveCN107274648AProtect relationshipGuaranteed accuracyTransmission systemsTransmissionFilter algorithmLandform
The invention relates to a telluric electromagnetic sounding data transmission and monitoring method based on Internet of Things and relates to the fields of Internet of Things, wireless transmission, intelligent terminal, database and data processing. In order to realize smooth data communication on the working site of the telluric electromagnetic sounding and especially under the condition of complex topography, severe environment and nonexistence of mobile phone signals, the invention provides a wireless networking technique suitable for telluric electromagnetic sounding working site and on the basis of Internet of Things and ZigBee, provides a wireless transmission protocol suitable for telluric electromagnetic sounding data transmission, provides a data processing and filtering algorithm and provides a database model suitable for management and automatic data organization of the data acquisition unit.
Owner:NORTHEAST NORMAL UNIVERSITY
Method and device for data collection of controllable source audio-frequency magnetotelluric sounding
ActiveCN107329183AEliminate the effects ofHigh Acquisition AccuracyElectric/magnetic detectionAcoustic wave reradiationAudio frequencyElectric power
The invention provides a method and a device for data collection of controllable source audio-frequency magnetotelluric sounding. The method includes: receiving an electric field signal and a magnetic field signal transmitted by a transmitter and propagated through a terrestrial medium; based on the frequency of the electric field signal or a magnetic field signal and the frequency of the power frequency fundamental wave, obtaining a sampling rate and a sampling length; sampling the electric field signal by using the sampling rate and the sampling length to obtain electric field information, and sampling the magnetic field signal by using the sampling rate and the sampling length to obtain magnetic field information; and calculating an electrical structure of the terrestrial medium based on the electric field information and the magnetic field information, wherein the fundamental wave is an artificial power interference signal that affects electric field signal and the magnetic field signal. The invention also discloses a corresponding device for data collection of controllable source audio-frequency magnetotelluric sounding.
Owner:中国地质科学院地球物理地球化学勘查研究所
Plateau hot karst lake identification method based on gas dissipation causes
ActiveCN112255703AReduce cost of measurementEasy to measureGeological measurementsRadio wave reradiation/reflectionTerrainFrequency spectrum
The invention discloses a plateau hot karst lake identification method based on gas dissipation causes, and particularly relates to the field of geochemical geophysical exploration. According to the method, a terrain relative altitude difference distribution diagram of a research area is obtained by investigating physical properties of the ground around a target lake in the research area and combining a micro-landform technology, a radar wave instantaneous frequency spectrum is obtained by detecting the research area through a low-frequency ground penetrating radar, and frozen soil layer faults and fracture causes are analyzed. The research area is measured by utilizing an audio magnetotelluric depth finder to obtain a frozen soil bottom plate thickness map, frozen soil distribution conditions in the research area are analyzed, a fracture structure of a target lakebed deep part is determined, and finally a soil methane gas content distribution map of the research area is drawn based ona geochemical detection technology. And the target lake is determined to be the plateau hot karst lake based on the gas dissipation causes according to the distribution condition of the soil methanegas content values. According to the method, a ground measurement and identification technology is adopted, the method is simple and easy to implement, and the plateau hot karst lake based on the gasdissipation causes is effectively identified.
Owner:中国地质科学院地球物理地球化学勘查研究所
Magnetotelluric sounding signal reconstruction method and magnetotelluric sounding signal reconstruction system
ActiveCN110908001AImprove denoising effectGuaranteed accuracyElectric/magnetic detectionAcoustic wave reradiationFrequency spectrumComputer science
The invention relates to a magnetotelluric sounding signal reconstruction method and system. The method comprises the following steps of acquiring an initial magnetotelluric sounding signal; performing complementary ensemble empirical mode decomposition on the initial magnetotelluric sounding signal to obtain a plurality of mode component sequences; performing Hilbert transform on the plurality ofmodal component sequences to obtain an instantaneous frequency spectrum of each modal component sequence; screening a modal component sequence corresponding to the instantaneous frequency spectrum according to the distribution condition of the frequency points of the instantaneous frequency spectrum; and reconstructing all the reserved modal component sequences to obtain a reconstructed magnetotelluric sounding signal. The magnetotelluric sounding signal reconstruction method and system provided by the present invention solves a problem that a good denoising effect cannot be achieved for themagnetotelluric sounding signal of a dead band in the prior art.
Owner:JILIN UNIV
Method, device and system for establishing metallogenic model based on controlled source audio magnetotelluric sounding
ActiveCN114002746BLow costElectric/magnetic detectionAcoustic wave reradiationMetallogenyGeological section
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Deep heat storage well position target area surveying method and device, electronic equipment and storage medium
PendingCN114397707AImprove selection efficiencyElectric/magnetic detectionGravitational wave measurementThermodynamicsWell placement
The invention relates to the field of geological exploration, in particular to a deep heat storage well position target area exploration method and device, electronic equipment and a storage medium. The method comprises the steps of obtaining gravity data of a to-be-measured region; determining a buried hill zone and / or a raised area according to the gravity data, and taking the buried hill zone and / or the raised area as a preferred target area; determining a magnetotelluric signal of the preferable target region according to magnetotelluric sounding; and determining electrical data of the preferred target region according to the magnetotelluric signal. The method and the device have the effect of improving the well position selection efficiency.
Owner:INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
3-D DIPON INVERSION METHOD FOR NONLINEAR CONJUGATE GRADIENT OF MAGNETOTEURUS
ActiveCN104123455BGuaranteed calculation accuracyImprove computing efficiencyElectric/magnetic detectionSpecial data processing applicationsData differencingModel modification
The invention provides a three-dimensional magnetotelluric tipper inversion method using nonlinear conjugate gradients and belongs to the technical field of magnetotelluric sounding. The method comprises steps as follows: S1, inputting data and performing ranking; S2, distributing the parameter of each frequency point to all cpus for tipper inversion and computing; S3, stopping parallel computing and combining the data, and comparing the difference between an invention result and the input date; S4, distributing the data difference and the parameter of each frequency point to all cpus for parallel computing of objective function gradients, computing the search direction p and the step length a and accordingly obtaining a model modification amount; S5, updating a module according to the model modification amount and stopping iteration when an objective function is one hour enough, otherwise, using a new model to repeat the steps from S2 to S5. According to the inversion method, tipper three-dimensional inversion is realized on the basis of tipper data by introducing a nonlinear conjugate gradient method, and the invention result approaches to real underground three-dimensional electrical structure information greatly; the method adopts a parallel computing structure, and the computing efficiency is improved.
Owner:INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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