137 results about "Seismic analysis" patented technology

A method of determining seismic data velocity models comprising dip-guided full waveform inversion that obtains a better velocity model with less computational requirements. DG-FWI quickly converges to provide a better image, obtains better amplitudes, and relies less on lower frequencies. Improved image quality allows detailed seismic analyses, accurate identification of lithological features, and imaging near artifacts and other anomalies.

An apparatus and method for analyzing known data, storing the known data in a pattern database (“PDB”) as a template is provided. Additional methods are provided for comparing new data against the templates in the PDB. The data is stored in such a way as to facilitate the visual recognition of desired patterns or indicia indicating the presence of a desired or undesired feature within the new data. Data may be analyzed as fragments, and the characteristics of various fragments, such as sting length, may be calculated and compared to other indicia to indicate the presence or absence of a particular substance, such as a hydrocarbon. The apparatus and method is applicable to a variety of applications where large amounts of information are generated, and/or if the data exhibits fractal or chaotic attributes.

System and method for performing anisotropy corrections of post-imaging seismic data for a subsurface formation. The method may receive seismic data, preferably pre-stack seismic data comprising a plurality of traces, e.g., collected from a plurality of source and receiver locations. The seismic data may be imaged/migrated to produce imaged seismic data, which is organized into an arrangement that preserves aspects of the relative seismic propagation angle in the subsurface. One or more anisotropic parameters and corresponding corrections may be determined by analyzing the organized imaged seismic data. The determined parameters or corrections may be used to correct at least a subset of the imaged seismic data, thereby producing corrected seismic data which is useable in analyzing the formation. The corrected data may then optionally be stacked to produce a collection of corrected stacked traces, and/or analyzed as desired. The pre-stack data and/or the corrected seismic data may optionally be displayed.

An apparatus and method for analyzing known data, storing the known data in a pattern database (“PDB”) as a template is provided. Additional methods are provided for comparing new data against the templates in the PDB. The data is stored in such a way as to facilitate the visual recognition of desired patterns or indicia indicating the presence of a desired or undesired feature within the new data. Data may be analyzed as fragments, and the characteristics of various fragments, such as string length, may be calculated and compared to other indicia to indicate the presence or absence of a particular substance, such as a hydrocarbon. The length and/or character of each fragment are a product of the cutting criteria in both horizontal and vertical orientations. Modifying the cutting criteria can have a beneficial effect on the results of the analysis and/or in the amount of time necessary to achieve useful results. The apparatus and method is applicable to a variety of applications where large amounts of information are generated, and/or if the data exhibits fractal or chaotic attributes.

The current invention provides a DSP which accommodates multiple current X-DSL protocols and is further configurable to support future protocols. The DSP is implemented with shared and dedicated hardware components on both the transmit and receive paths. The DSP implements both the discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) portions across a wide range of sample sizes and X-DSL protocols. Multiple channels, each with varying ones of the X-DSL protocols can be handled in the same session. The DSP offers the speed associated with hardware implementation of the transforms and the flexibility of a software only implementation. Traffic flow is regulated in the chip using a packet based schema in which each packet is associated with a specific channel of upstream and downstream data. Header and control information in each packet is used to govern the processing of each packet as it moves along either the transmit path or receive path. The DSP of the current invention may advantageously be utilized in fields other than communications, such as: medical and other imaging, seismic analysis, radar and other military applications, pattern recognition, signal processing etc. The present invention provides a signal processing architecture that supports scalability of CO/DLC/ONU resources, and allows a significantly more flexible hardware response to the evolving X-DSL standards without over committing of hardware resources. As standards evolve hardware may be reconfigured to support the new standards.

Embodiments of the present invention provide systems and methods for deriving a source signature for an array of seismic sources for marine seismic analysis, wherein the systems and methods include factors for determining the source signature taking into consideration both sea-surface and sea-floor reflections of signals produced by the seismic sources. In certain aspects, reflection coefficients of the sea-surface and the sea-floor and relative lengths of paths between a seismic source image and a detector are applied to a series of simultaneous equations that are solved using measurements of the pressure field produced by the array at a plurality of known locations to determine individual source signatures for each seismic source in the array and these individual source signatures may then be superposed to provide a source signature for the array that accounts for sea-floor reflections of outputs from the seismic sources.

The invention provides a method and system for reminding data traffic and an SAC (Seismic Analysis Code) platform. The method is applied to a data communication system which at least comprises a GGSN (Gateway GPRS Support Node) and the method comprises the following steps of: A, collecting event information related to a data communication event from the GGSN in time by the SAC platform, wherein the data communication event is started by a user; and B, judging whether the current data traffic meets a data traffic reminding condition by the SAC platform; and if so, supplying data traffic information related to the event information to the user. With the adoption of the invention, the accurate data traffic information can be reminded.

An approach for seismic data analysis is provided. In accordance with various embodiments, the active learning approaches are employed in conjunction with an analysis algorithm that is used to process the seismic data. Algorithms that may employ such active learning include, but are not limited to, ranking algorithms and classification algorithms.

An earthquake determination system which includes a plurality of observation terminal devices are connected by a communication network. When estimated P-wave detection information is received from the plurality of the observation terminal devices, a distance D between the observation terminal devices and a time interval δ between detection times are acquired and when transmission limit distance of local vibration energy is DSL, the minimum propagation speed of the earthquake P waves is SP, and the maximum detection error between detection times by the pair of observation terminal devices is Δt, the seismic analysis processor determines occurrence of an earthquake, if the both of the two pairs of the observation terminal devices satisfy the relationships of 2DSL<D and δ<D/SP+Δt.

A system and method instantly on-site analyze seismic acceleration signals measured from a primary wave of an earthquake and at a detecting site. The system includes an embedded computing host and a signal preprocessing module. Hardware preprocessing is executed on the seismic acceleration signals; and whether the earthquake is a seismic event is able to be determined according to a seism determining logic. Seismic acceleration signals are converted into ground velocities and ground displacements to obtain a peak ground displacement. A seismic fracture time parameter is calculated through the ground velocities and ground displacements and then a seismic magnitude of the earthquake is obtained. According to the peak ground displacement and the seismic magnitude, an epicentral distance is further calculated. Then a peak ground acceleration of the earthquake's shear wave at the detection site is able to be obtained through the seismic magnitude and the epicentral distance.

Seismic data is collected by using an electrical submersible pump assembly in a well that is producing well fluid. By sweeping the rotational speed of the pump assembly through a selected range at selected intervals, seismic waves of varying frequency are emitted. These seismic waves are then picked up with a seismic sensor located at the surface or located in another well. If the seismic sensors are located in another well, the signal from the sensor may be transmitted to the surface by superimposing the data onto the power cable leading to the pump located in that other well. The seismic survey may be repeated at regular intervals, and the results will reveal the changes that have taken place over time in the reservoir.

The invention relates to the technical field of civil and architectural engineering, in particular to a multi-segment natural ground motion synthesis method based on a set response spectrum. The method includes the following steps: collecting a large number of natural original ground motion records; screening out eligible seismic wave fragments through a specific method; and synthesizing the seismic wave fragments into a synthetic response spectrum closest to a target design response spectrum. The synthesis method follows the principle that the ground motion response spectrum is approximatelyconsistent with the target design response spectrum of the site. The ground motion synthesized can maintain the frequency-domain non-stationary property possessed by a natural ground motion record. The synthesis method is applicable to the anti-seismic analysis of all structure forms under the same fortification intensity and site conditions.

The invention relates to a fitting method for seabed near-fault seismic oscillation. The fitting method comprises the following steps: S1, calculating a seismic oscillation transfer function of an offshore site; S2, fitting high-frequency components of seabed seismic oscillation to obtain high-frequency acceleration time-history components of near-sea area near-fault seismic oscillation; S3, fitting low-frequency pulse components of the seabed seismic oscillation to obtain a low-frequency pulse type acceleration time history of the seismic oscillation; and S4, superposing the high-frequency acceleration time-history components with the translated low-frequency pulse type acceleration time history to obtain seabed near-fault seismic oscillation. According to the method, the bottleneck of lack of seismic oscillation records in existing cross-sea structure seismic analysis can be practically solved; the accurate and reasonable seismic oscillation input is provided for seismic performanceanalysis of the seabed near-fault structure; and the anti-seismic performance evaluation of the ocean structure can be promoted and improved.

The invention provides a universal rate-based transducer for advancing diagnostic and predictive analyses of low frequency physical phenomena, such as associated with heat and mass transfer, solid and fluid mechanics, pressure and seismic analysis. In many applications, such as in the fire metrology, aerospace, security and defense sectors, rate information is crucial for reaching fast and reliable diagnosis and prediction. In one preferred embodiment, the invention comprises a universal voltage rate sensor interface that accurately recovers the instantaneous heating/cooling rate, dT/dt. Upon appropriate calibration, this sensor interface allows real-time extraction of rates associated with many physical quantities of interest (e.g., temperature, heat flux, concentration, strain, stress, pressure, intensity, etc.).

A method of seismic analysis is disclosed for extracting information relating to lithology, porosity, fluids, and AVO types and/or displaying the extracted information. In one possible embodiment, AVO points are plotted and a distance and/or angle is utilized for extracting this information. Various portrayals of the extracted information displays may be produced including displays wherein the extracted information is then displayed in terms of colors for respective x, y, z locations. The AVO points may or may not be normalized based on a shape of a cluster of the AVO points prior to extraction of the information.

The invention discloses a concrete damage accumulation analysis method under cyclic load. The method comprises the following steps: firstly, establishing a three-dimensional isoparametric unit finiteelement model representing a concrete material; selecting a model, applying a normal grading load on a single side, giving a boundary condition, and determining a calculation time step; converting themulti-axis strain into unit single-axis equivalent strain through a four-parameter equivalent strain calculation method, and judging the tension and compression state of the unit; judging the loadingand unloading state of the current time step unit, and calculating the residual plastic strain and equivalent stress of the current time step unit; and calculating a unit damage variable based on a strain equivalence principle. According to the method, the influence of the hysteretic effect of the softening section of the concrete stress-strain curve under cyclic load is considered; the loading and unloading path of the hysteretic effect is defined, the damage accumulation process of the concrete material under the cyclic load can be accurately simulated, the method can be used for researching the dynamic performance of the concrete material, and actual guiding significance is provided for actual concrete structure anti-seismic analysis.