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67 results about "Geophysical prospection" patented technology
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A method and system for constructing a mapping relationship between acoustic wave velocity and surrounding rock stress
This invention belongs to the fields of rock mechanics, geological engineering, and geophysical exploration technology. Specifically, it discloses a method and system for constructing a mapping relationship between acoustic wave velocity and surrounding rock stress. The method includes: performing uniaxial graded loading on a standard sandstone sample and simultaneously measuring the P-wave velocity and S-wave velocity under each stress level; then fitting a linear mapping relationship between the P-wave / S-wave velocity ratio and the axial stress of the surrounding rock; introducing joint correction coefficients and water content correction coefficients to optimize the linear mapping relationship and constructing an acoustoelastic model; and using the acoustoelastic model and field-measured wave velocity data to invert the stress state of the actual surrounding rock, thus completing the construction of the acoustic wave velocity-surround rock stress mapping relationship. This invention solves the problems of traditional wave velocity-stress relationships, which, when describing the nonlinear response of rocks at different stress stages, are not sensitive enough to subtle stress changes and lack a complete, high-precision, and interference-resistant stress inversion calculation method, making them difficult to directly apply to complex actual engineering environments.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY
An Inversion Method for S-Wave Velocity Structure Based on Dense Micromotion Observations
This invention discloses an inversion method for S-wave velocity structure based on dense micromotion observations, belonging to the field of geophysical exploration and engineering geological exploration technology. The method includes: acquiring micromotion data; performing segmented preprocessing and cross-correlation calculations; constructing a phase consistency metric function based on the instantaneous phase information of the cross-correlation function for each time period; generating adaptive weighting coefficients; and then constructing an empirical Green's function through weighted superposition. Subsequently, time-frequency analysis is performed to obtain a time-frequency energy map; preliminary extraction of candidate dispersion velocities for each frequency is performed, and their comprehensive confidence level is calculated; after verification, a reliable dispersion curve is obtained. Based on the dispersion curve, a model parameter vector is established, and a joint objective function is constructed. A differential evolution algorithm is used for parallel global optimization inversion to obtain a one-dimensional S-wave velocity structure model below each station pair. The one-dimensional models are interpolated and fused to generate a two-dimensional S-wave velocity structure profile. This invention has the advantages of high inversion stability, high computational efficiency, and a high degree of automation.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY
Mine water disaster intelligent alarm system responding to multi-dimensional physical field parameter anomaly
The present application relates to the technical field of mine safety monitoring and geophysical exploration, in particular to a mine water disaster intelligent alarm system responding to multi-dimensional physical field parameter anomaly, comprising: a full-space data acquisition module: obtaining monitoring area observation data and calling background geological physical model; an ideal benchmark reconstruction module: constructing an ideal physical field benchmark under an anomaly-free state; a double-difference extraction module: calculating observation residuals of observation data relative to the benchmark and theoretical residuals of simulation responses relative to the benchmark; an inversion coupling verification module: driving the theoretical residuals to approximate the observation residuals and extracting parameter sensitivity characteristics; an intelligent alarm decision module: analyzing sensitivity characteristics and convergence state; determining as entity fluid anomaly characteristics to generate an alarm instruction; determining as non-target anomaly interference characteristics to execute signal suppression processing; the present application greatly reduces the false positive rate of mine water disaster detection.
Owner:LONGYAN UNIV
Method, apparatus, device, medium and product for improving signal-to-noise ratio of reconstructed data
The application relates to the technical field of petroleum geophysical exploration processing, and provides a method, device, equipment, medium and product for improving the signal-to-noise ratio of reconstructed data, which is characterized in that the signal-to-noise ratio of each trace of a target layer in an irregular observation system is calculated as the signal-to-noise ratio of the target layer, a three-dimensional array is constructed for data of a regular observation system designed based on the irregular observation system, the three-dimensional array is valued based on the irregular observation system, the three-dimensional array after the valuation is calculated based on three-dimensional curvelet transformation, and re-valuation is performed according to the signal-to-noise ratio of the data of the target layer of adjacent traces; the use proportion of high signal-to-noise ratio data in the reconstruction process is improved; after iterative calculation, the reconstructed data is output; the continuity constraint in each direction and the signal-to-noise ratio information of the target layer in the three-dimensional data can be fully utilized; the use proportion of high signal-to-noise ratio data in the reconstruction process is improved; and the signal-to-noise ratio of the reconstructed data is improved, thereby meeting the demand of exploration production.
Owner:CHINA NAT PETROLEUM CORP +1
Downhole three-component magnetic field sensing system based on atomic magnetometer
PendingCN122110292AElectric/magnetic detection for well-loggingMagnitude/direction of magnetic fieldsModem deviceWell logging
The present application relates to the technical field of geophysical exploration, in particular to a downhole three-component magnetic field sensing system based on atomic magnetometer. The downhole three-component atomic magnetic field sensor is connected with the optical fiber signal modem in the ground well logging vehicle through the armored photoelectric composite cable. The optical fiber signal modem is used for real-time demodulation of the three-component magnetic field signals and three-component attitude signals measured by the three-component atomic magnetic field sensor. The three-component atomic magnetic field sensor comprises a non-magnetic high-temperature packaging structure, a high-temperature-resistant atomic gas chamber module, a three-axis orthogonal laser optical system, a high-temperature-resistant photoelectric detection array, a power management module, a temperature sensor, a magnetic field solving and signal processing unit and a three-component optical fiber attitude sensor which are arranged in the non-magnetic high-temperature packaging structure. The three-component atomic magnetic field sensor adopts the atomic magnetometer measurement principle, combines the high-temperature-resistant materials and the optimized heat dissipation design, and can work stably in an environment of up to 200 DEG C.
Owner:OPTICAL SCI & TECH (CHENGDU) LTD
Combined attenuation-elastic-electric modeling and parameter prediction method for shale oil reservoir
The application discloses a kind of shale oil reservoir's attenuation-elastic-electricity combined modeling and parameter prediction method, belong to geophysical exploration and oil and gas reservoir evaluation technical field.First, obtain mineral components, pore structure and elastic-attenuation-electricity full-dimensional experimental data through core experiment, determine attenuation and resistivity as high sensitivity parameter after sensitivity analysis;Again, based on Hashin-Shtrikman boundary, differential equivalent medium theory, triple-pore medium wave propagation equation, construct the acoustic and electrical rock physics model of completely consistent micro-pore structure;Finally, establish longitudinal wave impedance-attenuation coefficient-resistivity three-dimensional joint rock physics chart, after multi-band correction, simultaneously quantitative prediction reservoir porosity, shale content and fracture porosity.The application breaks through the limitation of conventional acoustic-electricity combined model, significantly reduces the multi-solution of reservoir parameter prediction, and is suitable for fine evaluation of various shale oil tight reservoirs.
Owner:YUNLONG LAKE LAB OF DEEP UNDERGROUND SCI & ENG +1
Octree-based complex terrain direct current resistivity 3d forward and inversion method and system
The present application relates to the engineering geophysical exploration technical field, specifically to a kind of complex terrain direct current resistivity three-dimensional forward and inversion method and system based on octree;Method includes: establishing target information sequence;Three-dimensional geoelectric model based on octree grid is constructed using target information sequence, and local encryption is carried out in the surface near the detection area and electrode neighborhood, and the modeling result is output;Based on the modeling result, the underground active unit located below the terrain surface and the air unit located above the terrain surface are distinguished, the finite volume method is used to discretize and solve the direct current resistivity method potential field control equation of underground active unit, the theoretical potential response corresponding to electrode device is obtained, and the theoretical apparent resistivity response is obtained;Construct inversion objective function, and iteratively update resistivity parameters of three-dimensional geoelectric model using inversion strategy;The three-dimensional resistivity imaging result of underground medium in detection area is output through updated three-dimensional geoelectric model, and adverse geological body is identified.
Owner:ZHEJIANG HUADONG CONSTR ENG
Correction method, device and equipment of speed reversal, and medium
PendingCN122283907ACorrected speed inversion issueEliminate speed reversalClassical mechanicsPetroleum
This application provides a method, apparatus, equipment, and medium for correcting velocity reversal, belonging to the field of petroleum geophysical exploration technology. The method includes: acquiring a hybrid model of the target work area, which describes velocity variations within different layers of the target work area; determining at least one reversal layer based on the inter-layer velocities indicated by the hybrid model; adjusting the velocity sample values corresponding to any reversal layer at least once, and determining a correction gradient value for the reversal layer based on the relationship between the velocity of the upper boundary point corresponding to the reversal layer and the velocity of the lower boundary point after each adjustment; and correcting the intra-layer velocity sample values of the reversal layer based on the correction gradient value to obtain corrected intra-layer velocity sample values. Through this method, velocity reversal problems in the grid model can be corrected, eliminating velocity reversal situations inconsistent with geological laws, and facilitating accurate analysis results in subsequent velocity analysis.
Owner:CHINA NAT PETROLEUM CORP +2
A method for three-dimensional modeling and visualization based on gravity and magnetic data
This invention discloses a three-dimensional modeling and visualization method based on gravity and magnetic data, relating to the field of geophysical exploration technology. The method includes the following steps: performing multi-scale decomposition processing on gravity and magnetic anomaly data to weaken the volume field superposition effect; constructing a three-dimensional grid model of the study area based on the spatial distribution of surface observation data, using the density and magnetic susceptibility of each grid cell as model variables to be inverted, and reducing the impact of superposition effect on subsurface exploration modeling through multiple gravity and magnetic field components with different depth sensitivities, providing high-quality input for the constructed three-dimensional grid model; then inverting the three-dimensional grid model, and introducing differentiated weight constraints during the inversion process to improve the resolution and stability of the subsurface physical property distribution inversion, and enhance the accuracy of inferring subsurface geological properties.
Owner:CHINA EARTHQUAKE DISASTER PREVENTION CENT
A monitoring system and method for safety of high-voltage transmission of induced polarization
ActiveCN120779290BImprove production safetyEarth resistance measurementsShort-circuit testingData acquisitionGrounding resistance
The application discloses a kind of monitoring system and method for safety of induced electric high voltage launch, it is related to geophysical exploration instrument technical field, the system includes: data acquisition module, DC relay, control module and monitoring end;Data acquisition module, DC relay and monitoring end are connected with control module;Data acquisition module is used to calculate the ground resistance in the induced electric launch loop of target induced electric transmitter in real time, and the ground resistance of real-time calculation is sent to control module;Control module is used to send the ground resistance received in real time to monitoring end, and when ground resistance is greater than set resistance threshold, the DC bus voltage of target induced electric transmitter is disconnected by controlling DC relay, and open-circuit fault information is sent to monitoring end by wireless communication.The application realizes the real-time safety monitoring of high induced electric transmitter, and improves production safety.
Owner:ZIJIN MINING GROUP CO LTD
A 3D tomographic segmentation method based on local-global feature enhancement and geometric constraints
This invention relates to a 3D fault segmentation method based on local-global feature enhancement and geometric constraints, belonging to the fields of geophysical exploration and artificial intelligence. The method includes: standardizing and preprocessing the original 3D seismic data volume and cropping it into local sub-blocks; constructing an encoder-decoder network with 3DU-Net as the backbone, where the encoder extracts deep semantic features through 3D convolutional blocks, and the terminal layer aggregates multi-scale geological context information via MC-Bridge; the decoder embeds LG-Module and ACO-Module at each level; training the model using a structured loss function including binary cross-entropy loss, similarity coefficient loss, edge smoothing loss, and geometric constraint loss; and generating a fault prediction probability map by convolution and Softmax activation of the decoded enhanced features. This invention balances local texture details and global long-range dependencies, explicitly constrains fault geometry, and improves segmentation accuracy and geological plausibility.
Owner:QINGDAO UNIV OF SCI & TECH
A geological body boundary identification method based on adaptive matching of gravity and magnetic multi-source data
This invention relates to the field of geophysical exploration, specifically disclosing a method for identifying geological body boundaries based on adaptive matching of multi-source gravity and magnetic data. The method includes: acquiring gravity and magnetic anomaly data; estimating the equivalent source depth; constructing a depth-response mismatch correction field based on the depth attenuation difference between gravity and magnetic potential fields; compensating for and registering the magnetic anomaly with remanent magnetization and demagnetization offset; constructing an adaptive coupling direction tensor based on the consistency of the local gradient structures of the two fields; performing anisotropic boundary enhancement on the two fields using the principal direction of the adaptive coupling direction tensor as a constraint and the coupling strength as a weight; and iteratively fusing the two fields through mutual verification using the adaptive coupling direction tensor as a constraint and the depth-response mismatch correction field as a weight, outputting the fine spatial location of the geological body boundary and an adaptive confidence evaluation result. This invention achieves adaptive registration and direction constraint enhancement in the depth domain of gravity and magnetic data, effectively improving the accuracy and reliability of geological body boundary identification under complex geological conditions.
Owner:山东省地质调查院(山东省自然资源厅矿产勘查技术指导中心)
A method of sampling a shale plug
The present application relates to the technical field of petroleum and natural gas geophysical exploration, and discloses a shale plug sampling method.The shale plug sampling method comprises the following steps: S1, determining a core processing position in a well; S2, performing multidirectional sample processing to obtain a plurality of sample plugs; S3, judging whether the sedimentary characteristics of the plurality of sample plugs are consistent; if the sedimentary characteristics are inconsistent, returning to step S2; if the sedimentary characteristics are consistent, proceeding to the next step; S4, judging whether the physical characteristics of the plurality of sample plugs are consistent; if the physical characteristics are inconsistent, returning to step S2; if the physical characteristics are consistent, obtaining a target shale plug.The shale plug sampling method is suitable for remote and simple sampling environments, does not require laboratory precision measurement, and can obtain a plug sample with good consistency through simple operation, thereby ensuring that the multidirectional shale plug samples come from the same position in a core.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Quality control method and system for shotpoint firing
The present disclosure relates to the field of geophysical exploration technology, and discloses a quality control method and system for shotpoint excitation. The method is applied to a quality control analysis module and comprises: for each target shotpoint in a to-be-tested region, in response to an excitation module of an excitation assembly being excited at the target shotpoint position, real-time receiving optical fiber seismic data from a seismic data processing module, wherein the to-be-tested region has at least one target shotpoint, and the to-be-tested region has seismic instruments being collected; comparing whether the quality control result of the optical fiber seismic data meets the expected requirement to determine whether the excitation quality of the shotpoint meets the requirement; and in response to the excitation quality of the shotpoint meeting the requirement, determining that the excitation of the target shotpoint is effective. The method can solve the problem that the current seismic instruments cannot perform real-time quality control on the excitation state of the shotpoint, and improve the excitation production efficiency and quality of geophysical exploration.
Owner:CHINA NAT PETROLEUM CORP +1
Time-depth conversion method and system for marine seismic acquisition imaging
The present application relates to the technical field of geophysical exploration and marine engineering geological survey, and provides a time-depth conversion method and system for offshore seismic acquisition imaging. The time-depth conversion method for offshore seismic acquisition imaging comprises synchronously acquiring seismic data of a submarine tunnel line position and preprocessing the seismic data; based on the preprocessed seismic data, combining regional geological priori and drilling data, a multi-scale velocity field combining a macroscopic layered velocity model and a microscopic lateral variable velocity model is constructed; based on the multi-scale velocity field, a time domain seismic profile is converted into a seismic depth domain profile; transient electromagnetic apparent resistivity data are introduced to calculate corrected seismic velocity and thereby re-perform time-depth conversion to obtain seismic depth domain profile imaging; combining a complex spectrum correction method and a drilling data error verification method, the seismic depth domain profile imaging is optimized. The present application can realize efficient and accurate time-depth conversion of offshore complex geological structures and adverse geological bodies.
Owner:SHANDONG UNIV +1
Geological structure feature extraction method, device, medium and computer program product
This invention relates to the field of geophysical exploration and discloses a method, apparatus, medium, and computer program product for extracting geological structural features. The method includes: generating a true velocity model of the target area based on geological data of the target area; wherein the geological data includes geological structural data and well logging interpretation data; performing low-pass filtering on the true velocity model to obtain a low-resolution velocity model, and using the low-resolution velocity model and the true velocity model as training sample pairs corresponding to the geological data; generating a sample training set based on the training sample pairs corresponding to multiple sets of geological data of the target area, and training a preset network model based on the sample training set to obtain a trained network model; and extracting geological structural features of the area to be processed based on the low-resolution velocity model of the area to be processed through the trained network model. This improves the efficiency of geological structural feature extraction, provides structural feature constraint information for seismic velocity inversion, and improves the spatial resolution of seismic inversion.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
A tunnel geological disaster advance prediction method and system based on a quadrature field source
This invention belongs to the field of geophysical exploration technology and provides a method and system for advanced prediction of tunnel geological hazards based on orthogonal field sources. It constructs two sets of high-order pseudo-random signals, deploys orthogonal field sources, and each field source emits different sets of high-order pseudo-random signals. Two sets of orthogonal observation points are set up at the tunnel face and on the tunnel floor within a set distance. The two field sources are simultaneously excited, and the two sets of observation points observe and collect received signals for a set duration. Based on the frequency components of the emitted high-order pseudo-random signals, the electromagnetic field data of the corresponding field source is extracted. Based on the electromagnetic field data, the apparent resistivity of the single-component electric field and the Carnia apparent resistivity are calculated to obtain the detection results. This invention can realize the detection of geological conditions at tunnel construction sites.
Owner:SHANDONG UNIV
A forward modeling prediction method for seismic wavefields based on a lightweight TransUNet network
This invention discloses a seismic wavefield forward modeling prediction method based on a lightweight TransUNet network, relating to the fields of geophysical exploration and artificial intelligence. The method includes: acquiring a subsurface medium velocity model; inputting the velocity model into a lightweight TransUNet network, where the encoder extracts local geological structural features, a lightweight Transformer bottleneck layer models the global correlation features during the wavefield evolution process, and the decoder recovers the spatial distribution of the seismic wavefield at the target time; training the network using a composite loss function to establish a nonlinear mapping relationship between the subsurface medium velocity model and a two-dimensional seismic wavefield snapshot at the target time; and inputting the velocity model to be predicted into the trained model to obtain the corresponding seismic wavefield prediction result. This invention combines high prediction accuracy with computational efficiency, effectively reducing the computational overhead of traditional numerical forward modeling methods.
Owner:YANSHAN UNIV
A method for rayleigh wave inversion based on seismic-acoustic coupling
This invention discloses a Rayleigh surface wave inversion method based on seismic-acoustic coupling, relating to the fields of geological and geophysical exploration technology. The method includes: using an unmanned aerial vehicle (UAV) acoustic remote sensing platform, a microphone array is mounted on the UAV, and acquisition nodes are rapidly deployed remotely to jointly acquire pressure field data and displacement field data; the pressure field data and displacement field data are respectively subjected to dispersion spectrum imaging processing; dispersion curves are extracted from the obtained dispersion spectra, and then the stratigraphic structure profile is obtained by inversion processing of the dispersion curves. By comparing the inversion results of sound pressure and displacement, it was found that the models obtained by both are in good agreement with the actual stratigraphic model, verifying the feasibility of using sound pressure data to replace displacement data for inversion to obtain a reliable stratigraphic structure.
Owner:HEFEI UNIV OF TECH
A method and system for modeling a two-dimensional geological structure of an underground karst topography
The application discloses a kind of karst landform area underground two-dimensional geological structure modeling method and system, belong to geophysical exploration technical field.For the problem that karst landform area seismic data signal-to-noise ratio is low, physical property is strong inhomogeneous, drilling data is deficient and leads to poor geological modeling precision, the present application obtains electrical property, seismic and geological multi-source information by magnetotelluric sounding, two-dimensional seismic and shallow surface geological survey;With well-by-side sounding constraint electrical property structure processing;Comprehensive electrical property gradient zone and seismic wave group difference identification fracture;Deep region is tracked stratum using electrical property marker layer and seismic wave group, and stratum morphology is restored based on surface occurrence and drilling thickness in shallow region;Whether stratum sequence and thickness meet regional rule is evaluated by block, and model is iteratively optimized.The present application can significantly improve the modeling precision and reliability of underground two-dimensional geological structure in karst landform area, and is low in cost, easy to operate, applicable to low exploration degree region.
Owner:INST OF GEOPHYSICAL & GEOCHEMICAL EXPLORATION CHINESE ACAD OF GEOLOGICAL SCI
Power supply device for geophysical exploration
ActiveCN224289324UBatteries circuit arrangementsPV power plantsClassical mechanicsMechanical engineering
Owner:QINGHAI HYDROGEOLOGICAL ENG GEOLOGICAL ENVIRONMENTAL GEOLOGICAL SURVEY INST
A method and apparatus for detecting surface waves from natural sources
This invention discloses a method and apparatus for detecting surface waves from natural sources, belonging to the field of geophysical exploration. The apparatus includes a main unit, a vertical component broadband seismograph, a multi-channel amplifier, a data processing module, and a GPS synchronization module. The main unit uses a 32-bit ADC, with a GPS synchronization error of <15ns. The data processing module incorporates F-K and SPAC methods. The method comprises five steps: geodetic analysis using a CORS system with an accuracy of ±2.5mm +1ppm in static plane; instrument deployment as linear stations with a node spacing of 15-25 meters, deploying 40-50 stations at a time; single-line acquisition lasting 1-2 hours with 4G real-time monitoring; obtaining subsurface information through dispersion curve extraction, half-wave inversion, and 3D imaging; instrument consistency testing (0.1-10Hz consistency ≥98%), quality control with 3%-5% retesting at measurement points, and single-point error <±5%. This invention eliminates the need for artificial seismic sources, accommodates both shallow and deep detection, and in practical applications, the overall error is only ±2.96%, making it suitable for geological exploration and other fields.
Owner:ENERGY CHINA YNPD +1
Modeling method, device and equipment of quality factor of converted shear wave and medium
This application provides a method, apparatus, equipment, and medium for quality factor modeling of converted shear waves, belonging to the field of petroleum geophysical exploration technology. The method includes: acquiring an initial quality factor model of the converted shear wave, seismic wave data, and an asymmetric imaging gather; determining multiple intermediate parameters based on the seismic wave data and the asymmetric imaging gather during the i-th model update process; determining the model update amount during the i-th model update process based on the multiple intermediate parameters, and updating the quality factor model of the converted shear wave obtained in the (i-1)-th model update process; if the accuracy of the quality factor model of the converted shear wave obtained in the i-th model update process is less than a preset accuracy, performing the (i+1)-th model update process until the accuracy is not less than the preset accuracy. Through this method, the propagation information of seismic waves and the asymmetric imaging gather are fully utilized, providing a high-quality quality factor and improving the imaging quality of converted shear waves.
Owner:CHINA NAT PETROLEUM CORP +2
Irregular observation system design method and device
The application provides a non-regular observation system design method and device, and belongs to the technical field of geophysical exploration. The technical scheme provided by the embodiment of the application can forwardly simulate data based on the construction of a complete simulation observation system and the geological information of a block to be observed. Based on a preset reconstruction technology, a corresponding target processing domain is obtained, so that a better reconstruction effect can be obtained. Based on the simulation data, a preset undersampling rate and a preset undersampling mode, each trace set in the target processing domain is sequentially subjected to undersampling processing, the positions of the un-sampled shot points and the positions of the un-sampled geophones in the simulation observation system are deleted, and thus a non-regular observation system is obtained. The data reconstructed based on the non-regular observation system has a high signal-to-noise ratio, and the final data imaging quality can be improved.
Owner:CHINA NAT PETROLEUM CORP +1
A lithology prediction method based on geological statistical characteristic rule constraint
This invention relates to the field of geophysical exploration technology and proposes a lithology prediction method based on the constraints of geostatistical feature regularities. This method uses a large-scale exploration model to extract geostatistical feature regularities for lithology prediction, including: extracting seismic data; constructing virtual wells, simulating and generating virtual well data, and generating synthetic seismic records based on the seismic data; extracting geostatistical features to obtain their regularities; and constructing a multi-channel deep neural network model using seismic data and geostatistical features as inputs for lithology prediction. This invention expands the virtual wells using a Markov chain model and a sequential Gaussian simulation algorithm, and optimizes the model using K-Fold cross-validation, improving the generalization ability and stability of the seismic dataset. By combining seismic data with geostatistical features, multi-channel input, and a feature fusion layer, multi-source information is integrated. The accuracy is improved from 85.34% to 95.48%, providing a scientific basis for oil and gas reservoir identification and well location deployment.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
A multi-domain seismic diffraction wave field intelligent separation method and system
This invention belongs to the field of intelligent processing technology for geophysical exploration data, and discloses a multi-domain intelligent separation method and system for seismic diffraction wavefields. The method acquires full-field seismic data, including common offset domain data and / or dip domain data; constructs a dual-channel joint diffusion model with the full-field seismic data as input, which includes a dual-output noise prediction network for predicting the noise components of diffracted and reflected waves respectively; trains the model using a joint loss function that simultaneously constrains the prediction errors of diffracted and reflected wave noise; independently samples two initial noises from a standard normal distribution and inputs them into the trained model; using the full-field seismic data as conditions, iteratively generates separated diffracted and reflected wave data through a reverse denoising process. Experimental results show that the technical solution of this invention can be applied to different stages such as pre-stack processing and post-imaging processing, and has good application flexibility and engineering practical value.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Robot transient electromagnetic detection path intelligent planning method based on self-supervised learning
This invention discloses an intelligent path planning method for robot transient electromagnetic detection based on self-supervised learning, belonging to the interdisciplinary fields of geophysical exploration, robot control, and artificial intelligence. The invention involves a robot equipped with a transient electromagnetic system to collect data and simultaneously record spatial coordinates. After preprocessing, a feature encoder based on self-supervised contrastive learning is constructed. This encoder is pre-trained using the spatial proximity of unlabeled data to extract low-dimensional feature vectors representing geological continuity. Based on these feature vectors, a local anomaly factor algorithm is used to generate a probability distribution map of subsurface anomalies. An adaptive heuristic strategy is employed to dynamically switch between general survey, detailed survey, and boundary tracking modes, optimizing the path in real time. Pseudo-labels are generated using the detection results, and the encoder is continuously optimized through incremental learning. This invention eliminates the need for manual labeling, enables real-time perception of subsurface anomalies and dynamic path planning, significantly improving the automation level and detection efficiency of robot transient electromagnetic detection.
Owner:CHINA UNIV OF MINING & TECH
Cable winding device for 3D seismic data acquisition
This invention relates to the field of geophysical exploration equipment technology, specifically disclosing a cable winding device for three-dimensional seismic data acquisition, including a base, a winding drum, a drive mechanism, a universal guide, and a cable avoidance device. The universal guide is installed at the front end of the base and can adapt to the direction of the cable in both horizontal and vertical directions, guiding the cable to enter straight. The cable avoidance device is slidably disposed between the universal guide and the winding drum, used to drive the cable to reciprocate axially, and can temporarily stop axial movement to avoid the acquisition node when a acquisition node is detected on the cable. This invention can adapt to the variable angle traction of the cable under complex terrain in the field, eliminate lateral friction and accumulation, and can intelligently identify and avoid acquisition nodes on the cable, avoiding node damage or cable jamming, thus achieving non-destructive, neat, and efficient winding of special cables with acquisition nodes.
Owner:GANSU ENERGY QINGYANG COAL POWER CO LTD +1
A method for frequency conversion of well-seismic combined seismic data
PendingCN122085345Aincrease diversityEnhance unbiasednessSeismic signal processingSeismology for water-loggingWell loggingFrequency conversion
This invention discloses a well-seismic combined seismic data overlay method, relating to the field of geophysical exploration processing and interpretation technology in oil and gas field exploration. The method includes the following steps: S1, acquiring acoustic and density logging data, calculating the wave impedance curve and converting it to reflection coefficients, selecting a wavelet close to the seismic data, convolving it with the reflection coefficients to form a conventional synthetic record, and performing well-seismic calibration; S2, determining the target wavelet for overlay, and convolving it with the reflection coefficients to form a broadband synthetic record; S3, combining well-side seismic data, conventional synthetic records, and broadband synthetic records to construct a sample set, and balancing the number of samples; S4, expanding the sample set through mutation; S5, establishing a nonlinear relationship for overlay based on the sample set; S6, applying the nonlinear relationship to conventional seismic data to obtain high-resolution seismic data. This invention utilizes the advantages of wide bandwidth of well logging data and seismic frequency bands to enhance high-frequency seismic data and broaden the seismic frequency band, thereby improving seismic resolution.
Owner:CHINA NAT PETROLEUM CORP +1
A geophysical gravity and magnetic exploration data optimization method based on edge computing
The present application relates to the technical field of geophysical exploration equipment, and discloses a geophysical gravity-magnetic-electric exploration data optimization device based on edge computing, which comprises an exploration equipment array, an edge node device and a cloud server; the exploration equipment array is in communication connection with the edge node device, and the edge node device is in communication connection with the cloud server through an MQTT protocol; the exploration equipment array is used for synchronously collecting gravity-magnetic-electric original data, the edge node device is used for pre-processing, AI feature fusion and compression of the original data, and the cloud server is used for joint inversion and parameter iteration feedback. Through the collaborative architecture of the edge node and the cloud, the device solves the problems of high transmission delay, low weak anomaly recognition precision and poor inversion stability in traditional exploration data processing, realizes real-time processing and dynamic optimization of data, and improves exploration efficiency and geological interpretation accuracy.
Owner:GEOLOGICAL SURVEY BUREAU OF YUNNAN PROVINCE