57results about "Seismic data acquisition" patented technology

The invention discloses a background noise body wave extraction method and device based on distributed optical fiber acoustic sensing, and the method comprises the steps: obtaining an original phase difference signal along an optical fiber channel through a distributed optical fiber acoustic sensing system, and converting the original phase difference signal into strain rate data according to system demodulation parameters; performing preprocessing such as noise suppression and frequency energy balance on the strain rate data; calculating an autocorrelation function for the preprocessed signal, and superposing autocorrelation results of a plurality of time segments; performing band-pass filtering on the superposition autocorrelation function in a target frequency band, and extracting a body wave reflection response in background noise; and in order to eliminate the influence of the zero-time pulse in the shallow layer or weak reflection signal, carrying out mean value removal processing on the extraction result along the space direction to obtain a zero-offset body wave reflection response. The method can effectively describe the discontinuity from a superficial sedimentary layer and a fracture to a deep mourhua surface and even a lithosphere, and makes up for the defects of a conventional seismic station method.

A system and method for designing a seismic survey including selecting a seismic survey grid as a basis for a seismic survey design and looping through the steps of generating off-the-grid locations by imposing spatial or temporal constraints on on-the-grid locations, mapping the off-the-grid locations from a physical domain to a pre-selected domain by applying a multidimensional transform to the off-the-grid locations, mapping the pre-selected domain to a rank-revealing domain using a pre-selected operator, applying a pre-selected process to minimize a rank of the off-the-grid locations in the pre-selected domain, and updating the seismic survey design based on which of the off-the-grid locations has the minimum rank until a pre-selected threshold is met indicating an optimal seismic survey design. The system and method include acquiring seismic data using the optimal seismic survey design, and enabling performing a wellsite action based at least on the seismic data.

A method for designing a seismic survey including (a) selecting a seismic survey grid as a basis for a seismic survey design, (b) generating off-the-grid locations by imposing spatial / temporal constraints on on-the-grid locations of the seismic survey grid, (c) mapping the off-the-grid locations from a physical domain to a pre-selected domain by applying a multidimensional transform to the off-the-grid locations, (d) mapping the pre-selected domain to a rank-revealing domain using a pre-selected operator, (e) applying a pre-selected process to minimize a rank of the off-the-grid locations in the pre-selected domain, (f) updating the seismic survey design based on which of the off-the-grid locations has the minimum rank, (g) repeating steps (b)-(f) for a number of iterations until a pre-selected threshold is met indicating an optimal seismic survey design, and (h) acquiring seismic data using the optimal seismic survey design.

A method can include can include tracking machine generated interactions with a computational framework to perform a workflow related to a reservoir, where the workflow generates output data using input data that characterizes the reservoir; identifying non-useful interactions that do not contribute to generation of the output data; generating a representation of the workflow that does not include the non-useful interactions; and storing the representation of the workflow to a workflow inventory.

A method of performing a field (100) measurement is disclosed. The method comprises: arranging a landing dock (122) at a target location in the field, the landing dock (122) coupled to a fiber optic cable (123) for distributed fiber optic sensing measurements; guiding an unmanned aerial vehicle (UAV) (150) to land on a landing dock, the UAV (150) comprising an interrogator unit (151); communicatively coupling the interrogator unit (151) and the fiber optic cable (123) in response to the UAV landing on the landing dock (122); transmitting, by the interrogator unit (151), the light pulses to the fiber optic cable (123); receiving backscattered light from the fiber optic cable (123) in response to transmitting the light pulse; and generating, by the interrogator unit (151), a measurement of the target position based on the received backscattered light.

To provide a seismic sensor, an earthquake detection method, and an earthquake detection program with which it is possible to appropriately produce outputs for the seismic ground motion, etc. of vibration strength detected in accordance with acceleration due to vibration.SOLUTION: A seismic sensor 10 comprises an acceleration acquisition unit 21, an acceleration waveform generation unit 22, a frequency detection unit 24, and an earthquake determination unit 25. The acceleration acquisition unit 21 detects vibration and measures the acceleration of vibration. The acceleration waveform generation unit 22 generates an acceleration waveform that indicates a relationship between the acceleration measured by the acceleration acquisition unit 21 and an elapsed time. The frequency detection unit 24 detects, by a zero-cross scheme, the frequency of the acceleration waveform generated by the acceleration waveform generation unit 22. The earthquake determination unit 25 determines whether or not being an earthquake, on the basis of the frequency detected by the frequency detection unit 24.SELECTED DRAWING: Figure 2

A method to perform measurements of a field (100) is disclosed. The method includes disposing a landing dock (122) at a target location in the field, the landing dock (122) being coupled to a fiber optic cable (123) for distributed fiber-optic sensing measurement, directing an unmanned aerial vehicle (UAV) (150) to land on the landing dock, the UAV (150) including an interrogator unit (151), communicatively coupling, in response to the UAV landing on the landing dock (122), the interrogator unit (151) and the fiber optic cable (123), sending, by the interrogator unit (151), a light pulse to the fiber optic cable (123), receiving, by the interrogator unit (151) and in response to sending the light pulse, a backscattered light signal from the fiber optic cable (123), and generating, by the interrogator unit (151) and based on the received backscattered light signal, a measurement of the target location.

A method for designing a seismic survey including (a) selecting a seismic survey grid as a basis for a seismic survey design, (b) generating off-the-grid locations by imposing spatial / temporal constraints on on-the-grid locations of the seismic survey grid, (c) mapping the off-the-grid locations from a physical domain to a pre-selected domain by applying a multidimensional transform to the off-the-grid locations, (d) mapping the pre-selected domain to a rank-revealing domain using a pre-selected operator, (e) applying a pre-selected process to minimize a rank of the off-the-grid locations in the pre-selected domain, (f) updating the seismic survey design based on which of the off-the-grid locations has the minimum rank, (g) repeating steps (b)-(f) for a number of iterations until a pre-selected threshold is met indicating an optimal seismic survey design, and (h) acquiring seismic data using the optimal seismic survey design.

An invention that relates to streamers is described. These streamers contain one or more streamer sections. These sections can have sensors, channels, and / or analogue arrays of sensors are disposed along its length. At least one of these streamer sections has a variable density of sensors, channels, and / or analogue arrays along the length.

The invention belongs to the technical field of marine exploration equipment, and discloses an acquisition and transmission module and an offshore seismic exploration acquisition cable using the same. The acquisition and transmission module is embedded in a reserved window of an acquisition cable, and comprises two waterproof end blocks which are in fusion connection with a cable core wire and a cable sheath layer and are used for axial limiting and end sealing; the protective shell is internally provided with a space for accommodating the acquisition control circuit board; the two fixing end caps are used for fixing the shell; the limiting assembly is composed of a lining ring, a limiting block and a limiting supporting column and connected between the waterproof end block and the fixing end cap. The acquisition and transmission module fills gaps of all parts through an internal adhesive structure so as to be solidified into a whole, and the exterior is integrally wrapped by an injection molding protective layer. According to the acquisition and transmission module, the problems that the module is easy to loosen, poor in sealing and difficult to maintain in a complex marine environment are solved, and the stability and reliability of seismic data acquisition are remarkably improved.

According to one embodiment, a near-field data is used to determine a taper length that can isolate the source signature at the top of near-field data with minimum interaction with the Green's function. In some embodiments, a range of taper lengths is selected and for each length after tapering the near-filed data, converting each filtered near-field data to its minimum-phase equivalents. Summing pairwise cross-correlation of all of the minimum-phase equivalent wavelets at the zero-lag provides an attribute that shows how much the tapered portions of the near-field data look alike. An acceptable taper size will be the one that has the highest summation value. Finally, the average of the minimum-phase equivalents of tapered near-field data with the selected taper size is the estimated source signature.

The invention belongs to the technical field of geological exploration, and particularly discloses a symmetrical excitation anti-explosion geological exploration system and method, and the method comprises the steps: receiving array multi-channel signals at two sides, and carrying out the time alignment correction of all channel signals, so as to eliminate the time delay; a multi-channel cross-correlation matrix between the left array and the right array is constructed based on the aligned signals, and matrix elements are obtained through integral cross-correlation operation of array channel signals on the two sides; performing low-rank decomposition on the cross-correlation matrix, and extracting the first k main components as public noise modes; carrying out inversion calculation on the contribution of each noise mode in each acquisition channel, and reconstructing a channel noise component; and subtracting the reconstructed noise component from the original signal, and outputting a purified geological reflection signal. The method does not need special hardware, can accurately suppress the homologous low-frequency noise of the tunnel, improves the signal-to-noise ratio of the signal and the geological imaging resolution, and is suitable for geological detection of closed spaces such as the tunnel.

A multi-dimensional integrated monitoring system and method for underground engineering. The system comprises a point monitoring module (1) mounted on a plurality of first monitoring sections (01) of underground engineering, a line monitoring module mounted on a plurality of second monitoring sections (02), an area monitoring module mounted on a tunnel face (03), a volume monitoring module mounted on a plurality of third monitoring sections (04), and a data analysis platform for receiving and analyzing first feature information collected by the point monitoring module (1), second feature information collected by the line monitoring module, third feature information collected by the area monitoring module, and fourth feature information collected by the volume monitoring module. The system provided in the present application solves the problems of incapability of forming a unified system in which monitoring means are integrated to each other in underground engineering and incapability of comprehensively reflecting the overall situation of engineering.

Multicomponent seismic data 1a and fibre optic seismic data 1b is provided for a region. The data is input 2 into the neural network to train it to predict multicomponent seismic data from fibre optic

The invention discloses a seismic source on-the-road automatic layout method, a storage medium and equipment, and the method comprises the steps: automatically calculating the position of a selected road seismic source after setting a seismic source point spacing distance through employing the vector data of a road, calculating the number of times of coverage, reducing the spacing distance if the number of times of coverage is not satisfied, and automatically calculating the position again. And the coverage times meet the requirements. The vibroseis points can be quickly arranged along the road, and the arrangement positions of the vibroseis points are efficiently obtained.

Systems and methods are provided for generating a model for detection of seismic events. In this regard, one or more processors (220) may receive from one or more stations (110, 120, 130) located along an underwater optical route (100), one or more time series of polarization states (S1, S2, S3) of a detected light signal during a time period. The one or more processors (220) may transform the one or more time series of polarization states (S1, S2, S3) into one or more spectrums in a frequency domain. Seismic activity data for the time period may be received by the one or more processors (220), where the seismic activity data include one or more seismic events detected in a region at least partially overlapping the underwater optical route (100). The one or more processors then generate a model for detecting seismic events based on the one or more spectrums and the seismic activity data.

The invention provides a seismic exploration observation system data generation method, which comprises the following steps of: 1, acquiring observation system data or parameters, and extracting an excitation point, a receiving point and relation information between the excitation point and the receiving point from the observation system data or parameters; 2, re-numbering the receiving points and the excitation points according to three-dimensional space position distribution, and respectively storing the receiving points and the excitation points in receiving point information and excitation point information; step 3, establishing receiving group information according to the receiving point information; 4, establishing excitation group information, excitation set information and receiving set information; and step 5, respectively establishing relation information of the excitation group and the receiving group, and receiving and storing the relation information of the excitation group and the receiving group. The seismic exploration observation system data generation method can be compatible with requirements of a new exploration technology, richer relation information between excitation points, between receiving points and between excitation and receiving is established, and observation system data with comprehensive information and efficient access is provided for processing offset, forward inversion and the like after data acquisition.

A system for seismic event prediction uses seismic sensors and non-seismic sensors to collect real-time data at one or more sites. One or more processors receive the data, align it into time-synchronized windows, and generate modality-specific features. The system executes at least one predictive pathway selected from: a seismic model trained on seismic features, a non-seismic model trained on non-seismic features, a feature-fusion model trained on a joint representation of both, and a decision-fusion model that combines outputs of the seismic and non-seismic models. The system produces a model output indicating a likelihood of a seismic event within a prediction horizon and, in some cases, a magnitude estimate or time window, and generates an alert based on the output using region-configurable thresholds.

The application provides a sampling point determination method and device based on data trace correlation, equipment and medium, belonging to the technical field of seismic exploration. The method first obtains part of the sampling points of the irregular system by sampling the regular observation system, then determines the correlation between adjacent data traces based on the seismic data of the part of the sampling points, and finally determines part of the sampling points as the sampling points of the irregular system based on the correlation between adjacent data traces. Since the part of the sampling points is determined based on the correlation between adjacent data traces, the connection between the sampling points of the irregular observation system and the collected data is established, and the reconstruction quality of the irregular data can be improved.

The application belongs to the technical field of geophysical exploration, and particularly relates to a multi-sensor seismic source monitoring system and method, which comprises a central processing unit, which is used for receiving original data with time stamps synchronously collected by each sensor channel, calculating the signal-to-noise ratio of each sensor channel, and dynamically adjusting the gain, sampling rate and filtering parameters according to the signal-to-noise ratio; when the signal-to-noise ratio meets the requirements, the original data are fused into a joint feature vector; and the joint feature vector is output through a one-dimensional convolutional neural network deployed on the central processing unit to output the probability distribution of the seismic source output signal type and the regression estimated intensity value. The application can more comprehensively depict the seismic source characteristics by fusing multi-dimensional information, and improve the identification accuracy.

This invention discloses a detection system and method for urban karst water-conducting channels based on seismic Krauklis waves, comprising a piezoelectric controllable source, an array-type seismic receiving system, and a multi-wave seismograph. The piezoelectric controllable source is used to generate seismic waves; the multi-wave seismograph is used to acquire seismic data collected by various seismic acceleration sensors in the array-type seismic receiving system. This structure ensures the accuracy of data acquisition for each seismic wave. The acquired seismic wave data is first separated and extracted using an energy-frequency dual-selection method. Then, based on the dispersion characteristics of Krauklis waves, a mapping model between crack aperture and wavefield response is established. Finally, according to the mapping model, the aperture of the urban karst water-conducting channel is determined, and the dynamic flow rate of the urban karst water-conducting channel is obtained through inversion. This method enables the monitoring of the aperture and dynamic flow rate of urban karst water-conducting channels, ultimately effectively improving the prevention and control of hidden geological hazards.

The invention relates to the technical field of seismic exploration and observation system design, in particular to a seismic acquisition and observation system optimization method and system for a complex obstacle area, and the method comprises the steps: recognizing a linear obstacle band which is in a non-orthogonal relation with a measuring line direction in a work area, and determining an obstacle adjacent area and a target surface element set; carrying out statistics on an azimuth angle sector and a shot-geophone offset interval which are missed due to directional truncation of a linear obstacle band on a source detection vector in the target surface element set, and constructing a directional missing feature vector; generating a compensation source detection combination set, and calculating a compensation contribution value and a return contribution value; and iteratively selecting a compensation source detection combination according to the compensation contribution value and the return contribution value, and updating the directivity missing feature vector to obtain a seismic acquisition observation system scheme after compensation optimization. According to the method, targeted compensation can be carried out on directivity deficiency under the construction constraint condition, and cooperative adjustment of azimuth angle distribution and offset distribution in an observation system is achieved.

A method, computer-assisted system, and computer program product including training a proxy model to predict output from a numerical model of a volume of interest, receiving data representing an subsurface operation performed at least partially in the volume of interest, predicting one or more performance indicators for the subsurface operation using the proxy model, and updating the numerical model based at least in part on the one or more performance indicators predicted in the proxy model.

An exploration robot platform based on a microtremor survey technology for detecting unknown underground geological bodies in urban environments. The platform includes a robot system configured to con

Geophysical method for detecting heterogeneity in soil, comprising the steps of distributing geophones (1) between a first end (2.1) and a second end (2.2) of at least one measurement line (2), recording the position of the geophones (1), emitting into the soil at least one incident seismic wave from a seismic source (4) in the vicinity of the first end (2.1) of the measurement line (2), recovering a measurement signal transmitted by the geophones (1).The process includes the steps of isolating representative measurement signals of backscattered shear seismic waves received in return from the incident seismic wave, processing the measurement signals to numerically quantify the intensity of the backscattered shear seismic waves in order to detect soil heterogeneity, and measuring the arrival time of a peak in intensity of the backscattered shear seismic waves in order to determine, using a shear wave velocity distribution model in the soil, the position of the detected heterogeneity. ABRIDGED FIGURE: [Fig. 1].

The invention provides a layout method and a layout device for a large-scale seismic exploration observation system. The layout method for the large-scale seismic exploration observation system comprises the following steps: step 1, setting template parameters of the seismic exploration observation system; 2, generating a seismic exploration and observation system template according to the set seismic exploration and observation system template parameters; step 3, calculating the coverage range of model surface elements of the seismic exploration and observation system; step 4, analyzing and calculating surface element coverage characteristics according to the surface element coverage range and the type and quantity thereof; and step 5, generating a relative starting point set of all templates and all data of the observation system according to the layout parameters of the seismic exploration observation system. According to the layout method and layout device of the large-scale seismic exploration observation system, preprocessing is carried out through the observation system template, the graphic features covered by the template surface elements are constructed in combination with the layout parameters, and the layout processing speed of the observation system is remarkably improved.

A method for seismic surveying comprises deploying a plurality of seismic receivers proximate an area of subsurface to be surveyed. At least one seismic energy source moves in a path that circumscribes a center, wherein positions of the plurality of seismic receivers remain fixed. At least one of a distance between the path and the center changes monotonically as seismic energy source traverses the path, or the center moves in a selected direction as the seismic energy source traverses the path. The source is actuated at selected times as the at least one seismic energy source traverses the path, such that a spacing between positions of the source along the source path and transverse to the source path varies between successive actuations of the source. Seismic energy is detected at the plurality of seismic receivers resulting from actuating the at least one seismic energy source.

A seismic simulator on a carrier platform for generating simulated seismic signals is presented, comprising: a) a signaling unit programmed to dynamically vary the intensity, frequency and duration of the emitted background noise signals to simulate realistic seismic scenarios, b) an output unit which directs the emitted signals into the ground to amplify background noise.

This invention provides a timer-based acquisition management method, device, electronic device, and storage medium. The method includes: configuring an acquisition task for a controllable seismic source and establishing a one-to-one correspondence between the controllable seismic source and a first timer; monitoring the operating status of the controllable seismic source during its acquisition task; when the controllable seismic source is in a scan-ready state, controlling the first timer to stop timing; during the time the first timer is stopped, determining whether the operating status of the controllable seismic source has been updated, and controlling whether the first timer starts timing based on the update result; when the operating status of the controllable seismic source changes to a completed state, statistically analyzing the timing result of the first timer. This objectively simulates the entire process of simulated acquisition; and utilizes the timer to accurately measure the time consumed by the seismic source management main controller in determining the validity of the acquisition, using time as the sole influencing factor to achieve efficient acquisition and excitation management.

Systems and methods are provided for generating a model for detection of seismic events. In this regard, one or more processors (220) may receive from one or more stations (110, 120, 130) located along an underwater optical route (100), one or more time series of polarization states (S1, S2, S3) of a detected light signal during a time period. The one or more processors (220) may transform the one or more time series of polarization states (S1, S2, S3) into one or more spectrums in a frequency domain. Seismic activity data for the time period may be received by the one or more processors (220), where the seismic activity data include one or more seismic events detected in a region at least partially overlapping the underwater optical route (100). The one or more processors then generate a model for detecting seismic events based on the one or more spectrums and the seismic activity data.