911 results about "Seismology" patented technology

Methods and systems for creating a numerical pseudocore model, comprising: a) obtaining logging data from a reservoir having depth-defined intervals of the reservoir, and processing the logging data into interpretable borehole image data having unidentified borehole image data; b) examining one of the interpretable borehole image data, other processed logging data or both to generate the unidentified borehole image data, processing the generated unidentified borehole image data into the interpretable borehole image data to generate warped fullbore image data; c) collecting one of a core from the reservoir, the logging data or both and generating a digital core data from one of the collected core, the logging data or both such that generated digital core data represents features of one or more depth-defined interval of the reservoir; and d) processing generated digital core data, interpretable borehole image data or the logging data to generate realizations of the numerical pseudocore model.

A method for efficient inversion of measured geophysical data from a subsurface region to prospect for hydrocarbons. Gathers of measured data (40) are encoded (60) using a set of non-equivalent encoding functions (30). Then all data records in each encoded gather that correspond to a single receiver are summed (60), repeating for each receiver to generate a simultaneous encoded gather (80). The method employs iterative, local optimization of a cost function to invert the encoded gathers of simultaneous source data. An adjoint method is used to calculate the gradients of the cost function needed for the local optimization process (100). The inverted data yields a physical properties model (110) of the subsurface region that, after iterative updating, can indicate presence of accumulations of hydrocarbons.

A method for determining rotational offset between first and second gravity measurement devices deployed on a downhole tool is disclosed. The method includes positioning the tool in a previously surveyed section of a borehole that provides a historical survey including at least three previously surveyed azimuthal reference points and utilizing the gravity measurement devices to determine local azimuths at three or more sites in the previously surveyed section of the borehole. The method further includes comparing local azimuths with the historical survey and determining a rotational offset between the measurement devices that gives a best fit between local azimuths and the historical survey. A system adapted to execute the disclosed method and a computer system including computer-readable logic configured to instruct a processor to execute the disclosed method are also provided.

The method and system of the present inventions provides a new approach for selecting frequencies comprising a minimal or limited frequency data set for imaging leading to an order of magnitude decrease in computation resources. Seismic data are acquired and transformed a frequency domain. The data may be gathered in any manner. A plurality of minimal frequency subsets are formed comprising selected frequencies. The frequencies may be selected so that more frequencies are selected for shallower image positions. The selected frequencies are imaged to form frequency images. The selected frequencies may be individually weighted to assure a full and balanced bandwidth. The frequency images are composited to form an intermediate or final composited migration image.

Methods and systems for creating a numerical pseudocore model, comprising: a) obtaining logging data from a reservoir having depth-defined intervals of the reservoir, and processing the logging data into interpretable borehole image data having unidentified borehole image data; b) examining one of the interpretable borehole image data, other processed logging data or both to generate the unidentified borehole image data, processing the generated unidentified borehole image data into the interpretable borehole image data to generate warped fullbore image data; c) collecting one of a core from the reservoir, the logging data or both and generating a digital core data from one of the collected core, the logging data or both such that generated digital core data represents features of one or more depth-defined interval of the reservoir; and d) processing generated digital core data, interpretable borehole image data or the logging data to generate realizations of the numerical pseudocore model.

Method for reconstructing subsurface Q models (110) from seismic data (10) by performing ray-based (60), centroid frequency shift (50) Q tomography. The seismic source waveform's amplitude spectrum is approximated by a frequency-weighted exponential function of frequency (40), having two parameters to adjust to fit the frequency shift data, thereby providing a better fit to various asymmetric source amplitude spectra. Box constraints may be used in the optimization routine, and a multi-index active-set method used in velocity tomography is a preferred technique for implementing the box constraints (100).

The invention discloses a geological prediction system for constructing a tunnel passing through coal measure strata. The condition of the tunnel passing through the coal measure strata is specifically analyzed in a way of geological record, geophysical prospecting analysis or advance borehole according to specific condition based on macroscopic analysis which is adopted in sequence; the obtained information is classified so as to predict the geological condition of a main job and the geologic hazard of the coal measure strata; and the correlative information and data are used for completing the construction of the geological prediction system for constructing tunnel passing through coal measure strata. The invention provides a system for perfectly and exactly predicting the geology for constructing the tunnel passing through coal measure strata.

Disclosed is an echelon utilization battery pack with good seismic resistance. The echelon utilization battery pack involves a battery pack body and a battery, wherein the battery pack body is of a hollow cuboid structure, fixed seats are fixed at two ends of the inner bottom of the battery pack body, first fixed shafts are fixed between the two fixed seats, the first fixed shafts are slidably connected with a mounting seat in a sleeving mode, a first sliding groove is formed in the top of the mounting seat, second fixed shafts are fixed in the first sliding groove, and the two ends of the second fixed shafts are slidably connected with first sliding blocks.

Methods and apparatus facilitating radial profiling of shear slowness or shear modulus c66 in the cross-sectional plane of a borehole in an anisotropic formation with the vertical X3-axis are disclosed. According to some aspects of the invention, sonic tool bias is accounted for and removed from radial profiles. According to some aspects, sonic tool bias is accounted for by modeling the sonic tool as a heavy-fluid.

The invention relates to a high-seismic-resistance light high-intensity reinforced column and is characterized in that the high-seismic-resistance light high-intensity reinforced column is formed by depositing concrete after a reinforcement cage is assembled, wherein the reinforcement cage comprises four fission stirrups with equal sections, a center positioning stirrup, and longitudinal bards, the space between the external limbs of the two adjacent fission stirrups ranges from 25 mm to 200 mm; the center positioning stirrup is partially overlapped with the stirrup part of each limb of the four fission stirrups with equal sections, a plurality of longitudinal ribs are arranged on the inner sides of the fission stirrups and the positioning stirrup; at least one longitudinal rib is arranged in the overlapping part between the fission stirrup and the positioning stirrup, and the fission stirrup and the positioning stirrup are fixed into a whole; and the weights of the raw materials in the concrete are as follows: 130 kg / m3 to 180 kg / m of water, 160 kg / m3 to 500 kg / ms of cement, 50 kg / m3 to 250 kg / m of mineral admixtures, 100 kg / m3 to 400 kg / m of light aggregates, 300 kg / m3 to 900 kg / m of broken stones, 650 kg / m3 to 850 kg / m of sand, and 4 kg / m3 to 15 kg / m3 of water reducers. The high-seismic-resistance light high-intensity reinforced column has the advantages of high seismic performance, deformability, strong bearing capacity, and lightness.

A system and methods for acquiring seismic data is provided. In one aspect, the system and methods utilize a plurality of field service units placed over a region of interest, a repeater unit that wirelessly communicates with the field service units and a remote unit for controlling and processing the seismic data acquired by the field service units. In one aspect, the system and methods determine a condition associated with each of a plurality of attributes relating to acquisition of the seismic data at each field service unit, generate messages at each field service unit when the condition of a particular attribute meets a selected criterion, transmit the generated messages, receive the messages transmitted by at least a group of field service units at a repeater unit placed in the region of interest, analyze the messages received from the group of field service units at the repeater unit and then transmit information relating to the received messages to the remote unit for further processing. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

The invention discloses a shield construction ground subsidence prediction system and a method based on big data analysis, and mainly aims to solve the problem that ground subsidence cannot be predicted in an efficient and timely manner in a shield construction big data scene. A big data platform comprises a data collection module, a data preprocessing module, a feature extraction module, a prediction model building module, a model application module, and the like, which provide massive data storage and parallel computing services, and constitute the ground subsidence prediction system. The prediction method comprises the following steps: building a big data platform; collecting ground subsidence data during shield construction; preprocessing the data; extracting features; building a ground subsidence prediction model; packaging the function interfaces of the prediction model; and predicting ground subsidence in the construction process. The whole scheme is rigorous and complete in design, has massive data storage and parallel computing ability, is efficient and accurate in ground subsidence prediction, is used to predict ground subsidence caused by subway construction, and ensures the project quality and safety.

A safe early warning method and device for full-section tunneling of a tunnel featuring dynamic water and weak surrounding rock, comprising establishing a dynamic coordinate system with an origin thereof moving along a tunnel excavation line, recording the moving distance of the origin, conducting three-dimensional laser scanning with the origin as a center to obtain point cloud data including coordinate data, collecting surrounding rock data; conducting deformation fitting on the point cloud data, calculating a fitting residual error, removing a noisy point, and conducting preprocessing; combining data of preprocessed point cloud, surrounding rock, and the tunnel excavation line to construct a tunnel excavation dynamic model; conducting stress analysis according to the model and determining whether to send out a safety early warning signal. The device comprises a three-dimensional laser scanner, a geological radar device, a displacement module, an industrial computer, a data transmission module, an alarm, and a server.

Apparatus, computer readable medium, and program code for identifying rock properties in real-time during drilling, are provided. An example of an embodiment of such an apparatus includes a downhole sensor subassembly connected between a drill bit and a drill string, acoustic sensors operably coupled to a downhole processor, a borehole telemetry system, downhole and surface data transmitting interfaces, and a surface computer operably coupled to the downhole data transmitting interface. The downhole processor is adapted to perform operations including receiving raw acoustic sensor data resulting from rotational contact of the drill bit with rock, transforming the raw acoustic sensor data into the frequency domain, filtering the transformed data, and deriving acoustic characteristics from the filtered data. The surface computer is adapted to perform operations including deriving petrophysical properties from the acoustic characteristics directly or by utilizing a petrophysical properties evaluation algorithm.

System and method for enriching a bandwidth of seismic data related to a subsurface of a body of water. The system includes streamers and sources that are towed at alternating depths during consecutive and / or adjacent line of sails or during the same line of sail.

When a signal detection section detects a signal of an earthquake early warning, a control section (i) causes a storage apparatus to store display information being displayed on a display apparatus, (ii) reads, out of the storage apparatus, information on instructions in the event of an earthquake and an evacuation map in the event of an earthquake, (iii) causes the display apparatus to display: information on the instructions and the evacuation map; and information on the earthquake early warning and (iv) causes a printing apparatus to print the information on the instructions and the evacuation map. This allows a user to be appropriately evacuated from an installation site of the display apparatus.

The invention provides a method and a device for attenuating interbed multiples during the process of processing marine seismic data. The method comprises the following steps of preprocessing original seismic records to obtain preprocessed seismic records PPR (x, z0; t); overlapping the dynamically-corrected seismic records and obtaining the location of a strong reflecting interface L in which the interbed multiples are generated on the overlapped section; picking up primary reflection waves generated by the interface L from the dynamically-corrected seismic records, and correcting the primary reflection waves inversely and dynamically to obtain a second wave field item P2 (x, z0; t); deleting a reflected wave field above the interface L from the dynamically-corrected seismic records according to the location of the interface L, and carrying out inverse dynamic correction to obtain a first wave field item P1 (x, z0; t); setting a third wave field item P3 (x, z0; t) to be equal to the first wave field item; carrying out calculation according to the first wave field item P1 (x, z0; w), the second wave field item P2 (x, z0; w) and the third wave field item P3 (x, z0; w) to obtain the interbed multiples PLM (x, z0; w) relevant with the interface L; and attenuating the interbed multiples PLM (x, z0; t) of a time domain from the preprocessed seismic records PPR (x, z0; t) to obtain the records PME (x, z0; t) of the attenuated interbed multiples. By the adoption of the method and the device for attenuating the interbed multiples during the process of the processing marine seismic data, as the interbed multiples are predicted and attenuated only through data driving, independent of the precision of a velocity field, the processing quality of the marine seismic data is improved.

Methods and apparatus facilitating radial profiling of shear slowness or shear modulus c66 in the cross-sectional plane of a borehole in an anisotropic formation with the vertical X3-axis are disclosed. According to some aspects of the invention, sonic tool bias is accounted for and removed from radial profiles. According to some aspects, sonic tool bias is accounted for by modeling the sonic tool as a heavy-fluid.

The invention discloses a method and a system for decision making and early warning based on ground subsidence monitoring. The method comprises the following steps of setting a plurality of monitoring points, and positioning the monitoring points in a monitoring map, so as to obtain the monitoring data; calculating and analyzing the monitoring data, so as to obtain the feature values of the monitoring data; establishing a single measuring point calculating model, a multi-measuring point calculating model and a time sequence model; determining the parameters of the models, so as to obtain a single measuring point predicting model, a multi-measuring point predicting model and a time sequence predicting model; generating a subsidence hazard level judging rule; obtaining the to-be-monitored data, and calculating the subsidence amount or subsidence rate of each model; determining the ground subsidence hazard level of a monitoring point on the basis of the subsidence amount or subsidence rate of each model according to the subsidence hazard level judging rule, and performing early warning. The system comprises a monitoring point positioning module, a data obtaining module, a data analysis module and a display module. The method and the system have the advantages that the monitoring, decision making and early warning on the ground subsidence are performed, and the integrated data management and processing are realized.

The invention provides a method for predicting, preventing and controlling earth surface residual movement and deformation caused by a newly-built building in an old mining area. The prediction method is based on a mining parameter, which is obtained by geophysical prospecting, of an old mining area by an EH4 conductivity imaging system controlled by taking a mining map or geological drilling as geophysical prospecting analysis before the building is newly built, a traditional strata displacement parameter in Chine and a result of leveling carried out to an earth surface strike line when the newly-built building is about to be built on the earth surface of the old mining area; prediction targets are earth surface residual sinking, earth surface residual tilting deformation, earth surface residual curvature deformation, earth surface residual horizontal movement and earth surface residual horizontal deformation. Problems that parameters are insufficient and new parameters are difficult to popularize when people predict at present are solved, a damage level of the earth surface newly-built building in the old mining area can be evaluated, and a foundation (old mining area) grouting implementation method capable of preventing and treating earth surface residual movement and deformation is adopted for the newly-built building in advance. The method comprises a technological process of goaf grouting engineering by earth, grouting materials, serous fluid ratios and the like.

The invention relates to the technical field of geological disaster monitoring, in particular to a mine side slope deformation monitoring and early warning system and an early warning method thereof. The early warning system is composed of a ground control subsystem, a space wireless communication network and a communication auxiliary subsystem of monitoring workers, wherein the ground control subsystem, the space wireless communication network and the communication auxiliary subsystem are used for carrying out communication connection. The ground control subsystem is composed of a GPS mine side slope monitoring subsystem and a GPS monitoring data processing subsystem. The GPS monitoring mine side slope subsystem comprises a set of displacement measuring robots, a receiving antenna, a data transmission module, a GPS receiver and a power supply system, wherein the GPS receiver is used for receiving mine side slope deformation data collected by the displacement measuring robots. Various data are collected in real time, the monitoring data are processed, and the uploaded data are fast and automatically stored, transmitted, updated, counted and managed. The mine side slope deformation monitoring and early warning system has the advantages that the mine side slope displacement is dynamically monitored in real time, and safety production of a mine is guaranteed.

Method and system are described for modeling one or more geophysical properties of a subsurface volume. The method includes computing vector volumes from geophysical data to enhance subsurface features, where the vectors may be estimated by steps, including the following. Samples are extracted from a neighborhood around a selected data location (121). Coordinates are assigned to each sample (122). A weight is assigned to each sample as a function of the sample value (123). The sample coordinates and weights are used to fit a polynomial (124). A new value is then determined for the data location based on the polynomial fit, e.g. from the slope (125).

Provided is seismic imaging, particularly, reverse-time migration for generating a real subsurface image from modeling parameters calculated by waveform inversion, etc. A frequency-domain reverse-time migration apparatus includes: a source estimator configured to estimate sources from data measured on a plurality of receivers; and a migration unit configured to receive information about the sources estimated by the source estimator and to perform reverse-time migration in the frequency domain. The source estimator estimates the sources by updating an initial source vector using incremental changes according to a full Newton method. In more detail, the migration unit includes: a back-propagation unit configured to back-propagate the measured data; a virtual source estimator configured to estimate virtual sources from the sources estimated by the source estimator; and a convolution unit configured to convolve the back-propagated measured data with the virtual sources and to output the results of the convolution.

The invention relates to a site stratum three-dimensional geological structure model generation method for natural foundation replacement quantities calculation, for solving the defect of tedious and subjective foundation replacement quantities calculation compared to the prior art. The method comprises the following steps: preprocessing original data, collecting site exploration hole data and topographic map data, and performing interpretation preprocessing on the exploration hole data and the topographic map data; establishing an initial triangle network model, performing interpolation calculation on preprocessed data, and preliminarily generating an irregular triangle curved surface and a landform fluctuating curved surface; establishing stratum information of virtual borings, inserting the virtual borings, and fitting the stratum information of the virtual borings corresponding to a standard stratum; and generating an site three-dimensional geological structure model, through combination with curved-surface data of each stratum and the landform fluctuating curved surface, setting side restriction conditions, and generating a triangular-prism-element-based three-dimensional model. The method provided by the invention greatly improves the work efficiency and eliminates manual calculation errors.

There is disclosed a dual output compressive mode accelerometer having first and second output channels, comprising:a supporting base;first and second transducers mounted on the supporting base adjacent to one another, each transducer comprising a piezoelectric element and a seismic mass, the piezoelectric element positioned between the supporting base and the seismic mass; anda rigid mechanical coupling between the first and second transducers, the rigid mechanical coupling coupled to both of the first and second transducers above the supporting base.