166results about "Seismic data acquisition" patented technology

The invention belongs to the technical field of geophysical monitoring, and relates to an electromagnetic interference detection method for earthquake monitoring, which comprises the following steps: deploying a multi-dimensional electromagnetic field sensing unit and an earthquake signal acquisition unit and realizing high-precision synchronization; synchronously acquiring multi-dimensional electromagnetic field and seismic physical signal data; performing multi-feature and noise feature extraction on the two; inputting the features into a pre-trained machine learning / deep learning model for identification, and outputting information such as interference type, intensity and azimuth angle; and carrying out influence evaluation and quality marking on the seismic data according to the output, and selectively inhibiting or compensating. Through the above scheme, multi-dimensional perception and characterization, high-precision synchronization and correlation analysis, intelligent identification and spatial positioning are realized, and the reliability and accuracy of earthquake monitoring data are significantly improved.

The invention discloses an urban karst water guide channel detection system and method based on earthquake Krauklis waves. The urban karst water guide channel detection system comprises a piezoelectric type vibroseis, an array type earthquake receiving system and a multi-wave seismograph. The piezoelectric vibroseis is used for exciting seismic waves; and the multi-wave seismograph is used for acquiring seismic data acquired by each seismic acceleration sensor in the array type seismic receiving system. The structure can ensure the precision of seismic wave data acquisition each time; separating and extracting Krauklis waves from the acquired seismic wave data by adopting an energy-frequency double-selection method; then, based on the frequency dispersion characteristic of Krauklis waves, a mapping model of crack opening and wave field response is established; and finally, determining the opening degree of the urban karst water guide channel according to the mapping model, and performing inversion to obtain the dynamic flow of the urban karst water guide channel. Through treatment in the mode, the opening degree and the dynamic flow of the urban karst water guiding channel can be monitored, and finally prevention and control over hidden geological disasters are effectively improved.

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 method for monitoring subterranean hydrocarbon storage sites includes simulating a seismic experiment using a baseline model. The method also includes perturbing the baseline model to produce one or more perturbed baseline models. The method also includes selecting a plurality of candidate acquisition geometries to probe the one or more perturbed baseline models. The method also includes extracting a set of simulated data from the simulated seismic experiment that corresponds to the plurality of candidate acquisition geometries. The method also includes executing a model probing exercise for the extracted set of simulated data for each candidate acquisition geometry and each of the one or more perturbed baseline models.

A method for determining one or more ground properties of a target region beneath a surface of a bed of a body of water, the method comprising: generating a noise signal; outputting noise by a noise source located within the body of water based on the noise signal; receiving a data set, the data set comprising: a first response signal, the first response signal indicative of the generated noise measured at or near the surface by a first receiver arranged at a first location; processing the first response signal; cross-correlating or deconvolving the processed first response signal; and using the cross-correlated or deconvolved first response signal to generate a two-dimensional '2D' or three- dimensional '3D' model of the target region in terms of the one or more ground properties based on the cross-correlated response signals. Unlocking insights from Geo-Data, the present invention relates to improvements in sustainability and environmental developments: together we create a safe and liveable world.

The invention discloses a consistency detection method, device and system for large-scale seismic signal acquisition equipment, and relates to the technical field of geophysical exploration. The method is executed by computer equipment in a large-scale seismic signal acquisition equipment consistency detection system, and after background noise original data continuously and synchronously acquired by a plurality of seismic signal acquisition equipment is received, an accumulated power spectrum variance value of each acquisition equipment is obtained through preprocessing and multi-step calculation in sequence; and finally, according to the accumulated power spectrum variance value of each acquisition device and the distance from each acquisition device to the layout center position, determining the acquisition device with an abnormal relationship in the relationship dimension of the accumulated power spectrum variance and the acquisition time or the relative distance. The purpose of efficient, reliable and automatic consistency detection on large-scale seismic signal acquisition equipment can be achieved, and then the detection result can accurately reflect the performance state of a seismic instrument.

Systems and methods are disclosed. The method includes obtaining a seismic dataset for a subterranean region of interest and determining an inverted value of a stratum parameter by applying seismic inversion to the seismic dataset. The method further includes obtaining a well dataset within the subterranean region of interest and determining a standard deviation of the stratum parameter using the well dataset. The method still further includes iteratively or recursively defining a geological boundary condition for the subterranean region of interest, determining a stratigraphic model by applying forward stratigraphic modeling using the geological boundary condition, determining a measured value of the stratum parameter by applying a rock physics model to the stratigraphic model, and calculating the misfit value using the inverted value, the standard deviation, and the measured value until a misfit value is below a tolerance value. The stratigraphic model is then selected as a calibrated stratigraphic model.

The disclosed methods include: determining a central reference point for fluid migration associated with the stored subsurface fluid; generating a radial coverage detection space extending from the central reference point for the fluid migration associated with the stored subsurface fluid; initializing a subsurface computing model for the stored subsurface fluid; overlaying the radial coverage detection space or detection system over the subsurface model for the stored subsurface fluid; execute one or more simulations by adapting or varying the one or more parameters of the subsurface computing model based on fluid plume data or fluid pressure data associated with the stored subsurface fluid; generating, based on the fluid plume data or fluid pressure data, spatial or temporal fluid distribution data associated with the stored subsurface fluid; and generating, based on the spatial or temporal fluid distribution data, PP data and PS data associated with the stored subsurface fluid.

The invention discloses a time distance rule-based vibroseis excitation control method and device, and the method comprises the steps: carrying out the local search of the current planning data in a shot point distribution connected graph of a to-be-analyzed work area, and obtaining a local search optimal solution; during local search, simulating a plurality of vibroseis by using a simulation excitation model based on a TD rule to obtain actual cost; in the shot point distribution connected graph of the to-be-analyzed work area, segment migration local search is carried out between the planned paths of the vibroseis in the local search optimal solution, and a segment migration local optimal solution is obtained; when segment migration local search is carried out, a simulation excitation model based on a TD rule is utilized to obtain the actual cost; and taking the segment migration local optimal solution as current planning data, repeatedly executing the steps until an iteration termination condition is reached, and outputting the current planning data. According to the invention, deep fusion of the time distance rule and the path planning can be realized, and the production efficiency of the excitation control of the vibroseis is improved.

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.

The present application discloses a compressed sensing-based optimized layout method and apparatus for surface area point locations. The method comprises: obtaining initial offset data and using same as current offset data; and repeatedly executing the following steps until an iteration termination condition is met, and outputting optimal offset data: performing point location offset optimization on the basis of construction observation system parameters, a theoretical deployment SPS file and the current offset data to obtain an offset-optimized SPS file; deleting repeated point locations in the offset-optimized SPS file to obtain compressed sensing data; performing simulated reconstruction on the compressed sensing data on the basis of a preset undersampling ratio and a fold; performing simulated reconstruction feasibility verification by comparing the simulated reconstruction result with a theoretical deployment SPS acquisition data attribute, to obtain a reconstruction feasibility verification result; and when it is determined on the basis of the reconstruction feasibility verification result that the iteration termination condition is not met, adjusting the current offset data. The present application has high point location optimization accuracy.

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 computer-implemented method includes: accessing ground-force signal traces measured at each source location when applying a pilot sweep signal characterized by a sweeping instantaneous frequency that includes a fundamental component, wherein each ground-force signal trace comprises a fundamental mode signal component as well as at least one harmonic mode signal component; obtaining an analytic function representation for the pilot sweep signal and each ground-force signal trace, wherein the analytic function representation comprises a phase portion; establishing a matrix representation characteristic of the phase portion of the analytic function representation for the fundamental component in the ground-force signal, and wherein the matrix representation is size limited; retrieving, from the analytic function representation for each ground-force signal trace and after inverting the matrix representation, the fundamental mode signal component of the ground-force signal trace; and providing the retrieved fundamental mode signal component of each ground-force signal trace for subsequent data processing.

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.

System and method operable to estimate directional gradients of a seismic wavefield from seismic data from a seismic survey. The operations include receiving the seismic data describing the seismic wavefield, estimating the directional gradients, from the seismic data, of the seismic wavefield along one or more directions, using the seismic wavefield and the directional gradients to perform an action, creating interpolated data using the seismic wavefield and the directional gradients for interpolation, identifying a subset of the interpolated data based on pre-selected criteria, determining residual data based on a difference between the subset and the seismic wavefield, estimating the directional gradients from the residual data, and displaying the directional gradients.

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, 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.

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.

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.

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 system and method for time-lapse seismic data acquisition and processing using permanent or semi-permanent seismic sources, combined with a specialized processing workflow. The method is designed to reliably detect time-lapse changes in the structure and physical properties of subsurface formations over time by providing highly repeatable seismic surveys. This method includes optimizing the seismic source system based on the specific environment to determine the ideal sweep setups; establishing an efficient sweep schedule to maximize data quality while minimizing operational costs; creating a baseline seismic model by capturing seismic data over a predetermined time frame prior to production activities; and continuously acquiring and comparing time-lapse seismic data with the baseline to detect variations in seismic attributes that reflect structural or physical property changes in subsurface formations.

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.

A method for optimizing a seismic survey design includes obtaining a well trajectory, determining a depth range and a measurement interval for the seismic survey, determining an optimal seismic shot position for each receiver within the depth range using an inverse function, determining one or more potential seismic shot configurations that each include a number of seismic shots, a location for each of the number of seismic shots, and a power of each of the seismic shots, determining an estimate of a data quality for each of the determined one or more potential seismic shot configurations using an objective function, and determining an optimum seismic survey design based on the determined estimated data quality for each of the determined one or more potential seismic shot configurations, wherein the estimated data quality for the optimum seismic survey design is greater than a predetermined minimum threshold.

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.

A method for performing a seismic survey of an earthen subterranean formation includes deploying a node patch including a plurality of seismic receivers to an offshore seabed in a survey area, deploying a surface vessel towing an array of seismic sources to the survey area located, and activating the array of seismic sources to generate seismic waves as the array of seismic sources are transported in an inline direction through the survey area whereby an imaging activation pattern and a velocity activation pattern are formed, wherein a lateral offset between the velocity activation pattern and the node patch is greater than a lateral offset between the imaging activation pattern and the node patch.

Embodiments relate to data acquisition units or nodes and more specifically to seismic data acquisition units or nodes for use in data gathering for ambient noise tomography (ANT). Some embodiments relate to a method for data acquisition, and systems employing one or more data acquisition units. Some embodiments relate to systems comprising one or more satellites in communication with one or more data acquisition units for communication to a remote server, for remote storage, and processing for creating sub-surface tomography images accessible to client devices.

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.