| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 367049000 | Frequency | 13 |
| 20090080289 | Methods of hydrocarbon detection using wavelet dominant frequency and a measure of energy loss on the high-frequency side of wavelet dominant frequency - A method in accordance with one embodiment of the invention includes obtaining seismic trace data for a region of interest; processing the seismic trace data to calculate at least one spectrum for at least one sample from the seismic data; calculating at least one dominant frequency (ω | 03-26-2009 |
| 20090310442 | METHOD FOR SELECTIVE BANDLIMITED DATA ACQUISITION IN SUBSURFACE FORMATIONS - The method for exploring desired characteristics of a subsurface sector, having at least one resonant frequency, is based on selectively transmitting suitable narrowband energy waves into the subsurface sector, thereby producing narrowband signals reflected off the subsurface sector. The transmitted narrowband energy waves can be selectively and optimally adjusted in real time so as to provide optimum illumination of the desired characteristics from the explored sector. | 12-17-2009 |
| 20100128563 | Continuous Adaptive Surface Wave Analysis for Three-Dimensional Seismic Data - A technique includes receiving seismic data acquired in a survey of a region, the region being associated with locations; processing the seismic data to estimate at least one frequency dependent surface wave property over the region; based at least in part on the estimated frequency dependent surface wave property(ies), determining a frequency dependent data processing geometry for each location; and processing the seismic data based at least in part on the determined data processing geometries to derive a spatially continuous representation of a surface wave property across the region. | 05-27-2010 |
| 20100142320 | VIBROSEIS ACQUISITION METHOD - A method of performing a Vibroseis survey is described including the step of obtaining signals generated by activating vibratory sources at times T | 06-10-2010 |
| 20100165791 | METHOD FOR QUANTITATIVELY MAKING A THICKNESS ESTIMATE OF THIN GEOLOGICAL LAYERS BASED ON SEISMIC REFLECTION SIGNALS IN THE FREQUENCY DOMAIN - A method of estimating thickness of a geological layer includes selecting seismic reflection field data from a subsurface depth interval of interest; providing a plurality of geological models having different layer thicknesses and providing respective model responses from the plurality of geological models; comparing a frequency spectrum of the seismic reflection field data with each of the frequency spectra of the model responses to derive comparison data associated with the different layer thicknesses of the models; and deriving from the comparison data a model layer thickness that is indicative of the thickness of the geological layer. | 07-01-2010 |
| 20110267923 | APPARATUS AND METHOD FOR SEISMIC IMAGING USING WAVEFORM INVERSION SOLVED BY CONJUGATE GRADIENT LEAST SQUARES METHOD - Provided is an apparatus for seismic imaging by using waveform inversion in the frequency domain. The seismic imaging apparatus includes: a waveform inversion unit obtaining an equation by applying a Gauss-Newton method to an objective function consisting of residuals of logarithmic wavefields in frequency-domain waveform inversion and then obtaining a parameter vector, which minimizes the objective function, by solving the equation using a conjugate gradient method; and a subsurface structure display unit generating subsurface structure information using the parameter vector obtained by the waveform inversion unit and displaying the generated subsurface structure information. | 11-03-2011 |
| 20110305111 | EARTH ANALYSIS METHODS, SUBSURFACE FEATURE DETECTION METHODS, EARTH ANALYSIS DEVICES, AND ARTICLES OF MANUFACTURE - Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture are described. According to one embodiment, an earth analysis method includes engaging a device with the earth, analyzing the earth in a single substantially lineal direction using the device during the engaging, and providing information regarding a subsurface feature of the earth using the analysis. | 12-15-2011 |
| 20110310702 | METHOD FOR SELECTIVE BANDLIMITED DATA ACQUISITION IN SUBSURFACE FORMATIONS - The method for exploring desired characteristics of a subsurface sector, having at least one resonant frequency, is based on selectively transmitting suitable narrowband energy waves into the subsurface sector, thereby producing narrowband signals reflected off the subsurface sector. The transmitted narrowband energy waves can be selectively and optimally adjusted in real time so as to provide optimum illumination of the desired characteristics from the explored sector. | 12-22-2011 |
| 20120314538 | SYSTEM AND METHOD FOR SEISMIC DATA INVERSION - A system and computer-implemented method for determining properties of a subsurface region of interest from seismic data is disclosed. In an embodiment, the method includes obtaining seismic data representative of the subsurface region and an initial earth property model for the subsurface region, performing forward modeling using the initial earth property model to create modeled seismic data with similar acquisition specifications as the actual seismic data, transforming the modeled and actual seismic data to a temporal Fourier frequency domain to create frequency domain modeled and actual seismic data wherein the frequency domain modeled and actual seismic data include an amplitude portion and a phase portion, measuring the misfit between the frequency domain modeled seismic data and frequency domain actual seismic data to produce frequency domain residual seismic data, performing phase unwrapping of the phase portion of certain observed frequency components of the frequency domain residual seismic data to create an unwrapped residual phase portion, and inverting the unwrapped residual phase portion to determine desired properties of the subsurface region of interest, wherein the inverting minimizes an objective function defined to measure the misfit. The method may also include phase extrapolation. Additionally, the method may include a second inverting step using the result of the first inverting step as a starting model. The system includes a data source, a user interface, and a processor configured to execute computer modules designed to perform the method. | 12-13-2012 |
| 20140078863 | ASSAYING GOLD WITH A MICROWAVE PULSE - A system for assaying gold in a rock formation includes a transmitter and an acoustic sensor. The transmitter is configured to transmit a microwave pulse into the rock formation. The acoustic sensor is coupled to the rock formation and is configured to detect an acoustic wave emitted from the rock formation in response to receipt by the rock formation of the microwave pulse. | 03-20-2014 |
| 20140321241 | VIBROSEIS ACQUISITION METHOD - Methods and apparatuses for obtaining and/or processing slip sweep seismic survey data. The methods compute harmonic weight ratios using two types of data: 1) direct survey data where a harmonic sweep does not overlap with the fundamental component of responses of Earth interior and 2) another set of data representative of fundamental component of responses of Earth interior where the harmonic sweep does overlap with the fundamental component of responses of Earth interior. The set of data representative fundamental component of responses of Earth interior can be extracted from ground force measurements or a different sweep. The harmonic weight ratios using ground force measurements at overlapped frequencies may be calibrated with one or more harmonic weight ratios at non-overlapped frequencies. | 10-30-2014 |
| 20150309195 | SYSTEM AND METHOD FOR USING VEHICLE MOTION AS A LAND SEISMIC SOURCE - Method and source assembly for enhancing low-frequency seismic signals. The source assembly includes a vehicle configured to move to a desired location above ground; a lift and hydraulic actuator system attached to the vehicle and configured to generate seismic waves into the ground; auxiliary equipment attached to the vehicle; and one or more sensors located on the vehicle or the auxiliary equipment for measuring a vertical acceleration or a representation of the vertical acceleration of the source assembly. | 10-29-2015 |
| 20160131776 | INSTANTANEOUS FREQUENCY MODULATION ACQUISITION SCHEME FOR SEISMIC SOURCES - Computing device, computer software and methods for generating sweep signals corresponding to plural sources that generate seismic waves. The method includes selecting ( | 05-12-2016 |
