| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 702018000 | Velocity of seismic wave | 33 |
| 20080255762 | Correction for Errors Caused by Variation in Water Conditions - Method for processing seismic data to correct for errors caused by variation in water conditions. In one implementation, the method may include (a) applying a dip correction to a plurality of observed water bottom reflection times using a model water velocity and an estimate of geologic dip; (b) applying a normal moveout (NMO) correction to the dip corrected observed water bottom reflection times using the model water velocity; (c) applying a common mid point (“CMP”) bin centering correction to the NMO corrected, dip corrected observed water bottom reflection times using the model water velocity and the estimate of geologic dip; (d) solving for Δs | 10-16-2008 |
| 20100030479 | Methods and computer-readable medium to implement computing the propagation velocity of seismic waves - The invention relates to methods and computer-readable medium to implement computing the propagation velocity of seismic waves in the earth. The invention computes the true propagation velocity of seismic waves in the earth, which is a condition of obtaining an accurate image of subsurface geology that can be used to prospect for oil and gas deposits. In an embodiment, the method of computing the propagation velocity of seismic waves in earth, includes providing an estimate of the propagation velocity, generating a time shift gather using a depth migration at a plurality of locations of the earth, converting each of the time shift gathers to a semblance gather, transforming each semblance gather into a velocity gather whose energy peaks represent a root-mean-square average of the propagation velocity along the forward and backward path between earth's surface and a point of the subsurface geology, and converting the energy peaks to the propagation velocity. | 02-04-2010 |
| 20100185396 | METHOD FOR CALIBRATING SEISMIC IMAGING VELOCITIES - A method for adjusting an isotropic depth image based on a mis-tie volume is provided. The method generally includes obtaining an isotropic velocity volume for a geophysical volume, obtaining an isotropic depth image of the geophysical volume, obtaining time-depth pairs at downhole locations in the geophysical volume, generating mis-tie values based on the time-depth pairs and the isotropic velocity volume, assigning uncertainties to the mis-tie values, generating a smoothest mis-tie volume that satisfies a target goodness of fit with the mis-tie values. Adjustment of the isotropic depth image may be achieved based on the mis-tie volume or a calibration velocity obtained from the mis-tie volume. | 07-22-2010 |
| 20100332139 | FORMING A GEOLOGICAL MODEL - A method of forming a geological model of a region of the earth includes obtaining seismic data relating to the region, the seismic data including seismic traveltime uncertainty. A seismic velocity model of the region may also be provided and includes velocity uncertainty. Ray tracing may be performed on the seismic data using the velocity model to determine the three dimensional positions of a plurality of points of the region. The three dimensional positional uncertainties (7-12) of at least some of the points can be calculated from the traveltime uncertainty, the velocity uncertainty, and uncertainty in the ray propagation direction. This can be combined with the positions determined by the ray tracing to form a geological model. | 12-30-2010 |
| 20110153219 | Direct velocity seismic sensing - A disclosed direct velocity seismic sensor includes a housing, a proof mass suspended in the housing by a resilient component, and a motion dampener that damps oscillation of the proof mass to a degree that displacement of the proof mass relative to the housing is substantially linearly proportional to a rate of change of seismic displacements of the housing over a frequency range of interest. A described method for constructing a seismic sensor includes using a calculated resonant frequency to determine a damping factor that causes the displacement of the proof mass to be substantially proportional to the rate of change of seismic displacement of the housing. One illustrative disclosed system includes an optical velocity sensor and a detector where a light beam produced by the velocity sensor and a reference beam interfere at the detector, and the detector produces a signal indicative of a velocity experienced by the velocity sensor. | 06-23-2011 |
| 20120010820 | Fresnel Zone Fat Ray Tomography - A stable method for using fat-ray tomography to determine a high-resolution velocity model of the subsurface from seismic data ( | 01-12-2012 |
| 20120095690 | Methods and computer-readable medium to implement inversion of angle gathers for rock physics reflectivity attributes - The invention relates to methods and computer-readable medium to determine seismic reflectivity attributes indicating the presence of hydrocarbons in earth. In several embodiments, the methods and computer-readable medium perform the steps of computing seismic reflectivity attributes includes inputting data representing reflected seismic waves and a volume of P-wave velocity, transforming the volume of P-wave velocity into a volume of bulk density, transforming the volume of P-wave velocity into a volume of S-wave velocity using amplitude information from the reflected seismic waves, and using the volume of S-wave velocity and the volume of P-wave velocity to compute the reflectivity attribute. | 04-19-2012 |
| 20120185171 | MULTIPLE ANISOTROPIC PARAMETER INVERSION FOR A TTI EARTH MODEL USING WELL DATA - A method for determining values of anisotropic model parameters of a Tilted Transversely Isotropic (TTI) Earth model, the method including obtaining an initial TTI earth model that substantially flattens common-imaging-point gathers and substantially ties seismic data to well data; inputting checkshot data and/or VSP data to determine updated values of Vp | 07-19-2012 |
| 20120253683 | DETERMINING AN INDICATION OF WAVEFIELD VELOCITY - Translational data acquired by at least one translational survey sensor is received, and rotation data is received. A representation of wavefield velocity based on the translational data and the rotation data is determined | 10-04-2012 |
| 20130046476 | SYSTEM AND METHOD FOR SUBSURFACE CHARACTERIZATION INCLUDING UNCERTAINTY ESTIMATION - A system and method for subsurface characterization including depth and structural uncertainty estimation is disclosed. In one embodiment, the method may include determining a detectability threshold for moveout in a seismic data gather based on the seismic data and computing a depth uncertainty function, wherein the depth uncertainty function represents an error estimate that is used to analyze an interpretation of the seismic data. In another embodiment, the method may include receiving a depth uncertainty volume and at least one interpreted horizon from seismic data, extracting a depth uncertainty cage for each of the interpreted horizons based on the depth uncertainty volume, and simulating multiple realizations for each of the interpreted horizons, constrained by the depth uncertainty cage. The multiple realizations may be used for analyzing changes to geometrical or structural properties of the at least one interpreted horizon. The changes may be plotted as at least one distribution and may be used to make P10, P50 and P90 estimates. | 02-21-2013 |
| 20130116928 | ESTIMATING VELOCITIES WITH UNCERTAINTY - A method and apparatus for estimating velocity in a subsurface region. Seismic data for a subsurface region may be received. One or more attributes for the seismic data may be calculated. A posterior distribution may be generated. The posterior distribution may represent one or more probabilities of one or more velocities for the attributes. A velocity with uncertainty may be determined for the subsurface region based on the posterior distribution. A pore pressure with uncertainty may be determined based on the velocity with uncertainty. | 05-09-2013 |
| 20130131990 | DEVICE AND METHOD FOR COMPUTING DEPTH VELOCITY VARIATIONS - Method, computer device and software for calculating a corrected temporal variation (dt | 05-23-2013 |
| 20130131991 | DEVICE AND METHOD FOR COMPUTING DEPTH VELOCITY VARIATIONS - Method, computer device and software for calculating a corrected temporal variation (dt | 05-23-2013 |
| 20130144534 | Multi-Component Spectral Warping Analysis for Thin Bed Resolution - A characteristic of a target layer is determined by receiving primary wave data and secondary wave data from multi-component receivers for acquiring both primary wave data and secondary wave data in a seismic exploration system, calculating a Vp/Vs ratio by correlating in a frequency domain a number of estimated primary wave spectra derived from a measured secondary wave spectrum to a measured primary wave spectrum, wherein Vp is a first velocity of a primary wave and Vs is a second velocity of a secondary wave for a target depth interval, using a warp factor associated with the Vp/Vs ratio, calculating a time separation for primary wave signals from a top and a bottom of the target depth interval. | 06-06-2013 |
| 20130144535 | METHOD FOR DETERMINING TIME CORRECTION FOR A DETECTOR PLACED ON THE SEABED - The invention relates to a method for determining, for a detector placed on the surface of the seabed, the vertical propagation time and the velocity of propagation in the water of a wave emitted from an emission point. The method includes: emitting a wave from the emission point; recording the wave received by the detector; determining the vertical propagation time by, where t | 06-06-2013 |
| 20130231868 | FORMING A GEOLOGICAL MODEL - A method of forming a geological model of a region of the earth includes obtaining seismic data relating to the region, the seismic data including seismic traveltime uncertainty. A seismic velocity model of the region may also be provided and includes velocity uncertainty. Three dimensional positions of a plurality of points of the region can then be determined. The three dimensional positional uncertainties of at least some of the points can be calculated from the traveltime uncertainty and the velocity uncertainty. This can be combined with the positions to form a geological model. | 09-05-2013 |
| 20130238249 | SEISMIC REFLECTION FULL WAVEFORM INVERSION FOR REFLECTED SEISMIC DATA - A system and method are described herein for generating a velocity model of returned seismic signals for under-ocean floor environments. The system and method generate a series of source signals, receive a corresponding set of direct signals, reflected signals, and refracted signals, solve a velocity model equation using a full waveform inversion function with respect to the received set of direct signals, reflected signals and refracted signals to minimize a least square misfit function by relaxing a dependency on low frequency reflections in the full waveform inversion function. The system and method then generate the velocity model based on the solution to the velocity model equation, and display the velocity model. | 09-12-2013 |
| 20140052379 | DETECTION OF SINKHOLES OR ANOMALIES - Systems and methods are provided for detecting subterranean properties associated with a geological domain. One example method may comprise obtaining waveform information corresponding to a geological domain. The method may further comprise performing a global inversion on the waveform information. Furthermore, the method may comprise performing a deterministic inversion on the waveform information. The method may also comprise determining one or more subterranean properties associated with the geological domain based at least in part on the global inversion and the deterministic inversion. | 02-20-2014 |
| 20140081577 | Method For Calibrating Seismic Imaging Velocities - A method for adjusting an isotropic depth image based on a mis-tie volume is provided. The method generally includes obtaining an isotropic velocity volume for a geophysical volume, obtaining an isotropic depth image of the geophysical volume, obtaining time-depth pairs at downhole locations in the geophysical volume, generating mis-tie values based on the time-depth pairs and the isotropic velocity volume, assigning uncertainties to the mis-tie values, generating a smoothest mis-tie volume that satisfies a target goodness of fit with the mis-tie values. Adjustment of the isotropic depth image may be achieved based on the mis-tie volume or a calibration velocity obtained from the mis-tie volume. | 03-20-2014 |
| 20140236487 | METHODS AND COMPUTING SYSTEMS FOR PROCESSING SEISMIC DATA - Methods and computing systems for processing seismic data are disclosed. In one embodiment, a method for processing seismic data comprises receiving seismic data that includes active data corresponding to an active shot from a seismic source. The processing includes processing at least a portion of the active data using a passive data processing technique. | 08-21-2014 |
| 20140278120 | METHODS AND SYSTEMS FOR LOCATING SEISMIC EVENTS - Embodiments of locating seismic events are disclosed. In one embodiment, a single difference seismic locator and a reverse double difference seismic locator are combined into a combined system of equations, and the combined system of equations is solved to determine a location of the seismic event in substantially real time relative to the seismic event. The combined system of equations may be weighted such that the determined location of the seismic event is partially influenced by the single difference seismic locator and partially influenced by the reverse double difference seismic locator. | 09-18-2014 |
| 20150012221 | Full-Wavefield Inversion of Primaries and Multiples in Marine Environment - Method for using the full wavefield (primaries, internal multiples and free-surface multiples) in inversion of marine seismic data, including both pressure and vertical velocity data ( | 01-08-2015 |
| 20150057938 | SIMULTANEOUS SOURCING DURING BOTH SEISMIC ACQUSITION AND SEISMIC INVERSION - Method for acquiring, at reduced acquisition cost, seismic data using simultaneous, field-encoded sources in the field ( | 02-26-2015 |
| 20150120200 | TWO STAGE SEISMIC VELOCITY MODEL GENERATION - A computer-implemented process includes: performing a first foil waveform inversion on an initial subsurface attribute model using low frequency, known source-signature data and low frequency humming seismic data to generate a first updated subsurface attribute model; and performing a second full waveform inversion on the first updated subsurface attribute model using low-frequency, narrowband sweeping known source-signature data and low-frequency, swept seismic data to generate a second updated subsurface attribute model. The process may be performed by a suitably programmed computing apparatus, the program residing on some form of non-transitory program storage medium. | 04-30-2015 |
| 20150293246 | FREQUENCY-DOMAIN AUGMENTED TIME-DOMAIN FULL WAVEFIELD INVERSION - A basically time-domain method for performing full wavefield inversion of seismic data to infer a subsurface physical property model ( | 10-15-2015 |
| 20150301211 | METHOD AND DEVICE COMPENSATING FOR WATER VELOCITY VARIATION FOR 4D DATA SETS - Methods for determining a seismic wave's propagation velocity in water for monitor seismic data of a 4D data set analyze a relationship between seafloor time-shifts and source-receiver offsets. The time-shifts are differences of normal move out corrected seafloor source-receiver travel times for pairs of traces. Each pair includes a base trace extracted from base seismic data of the 4D data set and a monitor trace extracted from the monitor seismic data, the traces corresponding to the same seafloor bin and having the same source-receiver offset. | 10-22-2015 |
| 20160047925 | Method of Determining Seismic Acquisition Aperture - Embodiments of a method for determining a seismic acquisition aperture are disclosed herein. In general, embodiments of the method utilize ray tracing with simulation of dip angles with virtual convex surfaces. In particular, embodiments of the method use the placement of a plurality of spherical convex surfaces around a subterranean region or area of interest. Further details and advantages of various embodiments of the method are described in more detail below. | 02-18-2016 |
| 20160070013 | DEVICE AND METHOD FOR VELOCITY FUNCTION EXTRACTION FROM THE PHASE OF AMBIENT NOISE - Methods and systems for deriving S-wave velocity information from the low-frequency content of ambient noise are described. The ambient noise can be collected on a dedicated record or on a production record associated with the receivers of a three-dimensional seismic survey. The methods and systems use one of a plurality of analysis models selected based on quality factors of the ambient noise data. The methods and systems analyze the data at a plurality of single frequencies then transform the velocity versus frequency data into velocity versus depth data. | 03-10-2016 |
| 20160084975 | SEISMIC DATA PROCESSING - Described herein are implementations of various technologies for a method for seismic data processing. The method may receive seismic data for a region of interest. The seismic data may be acquired in a seismic survey. The method may receive a summation that is based on a particle motion velocity component of a seismic wavefield in the vertical direction and the pressure component of the seismic wavefield. The method may predict an upgoing pressure component of the seismic wavefield for the region of interest. The method may compare the predicted upgoing pressure component to the received seismic data that corresponds to the received summation. The method may update the predicted upgoing pressure component based on the comparison. The method may use the updated upgoing pressure component in hydrocarbon exploration or production for the region of interest. | 03-24-2016 |
| 20160146960 | METHOD OF ANALYSING A SUBSURFACE REGION - A method of analysing a subsurface region. 4D seismic data is received from a subterranean reservoir that is being seismically evaluated. A first set of values representing a first attribute at a plurality of first coordinates within the subsurface region is obtained from the 4D seismic data. A second set of values representing a second attribute at a plurality of second coordinates within the subsurface region is also obtained from the 4D seismic data, wherein each of the plurality of second coordinates corresponds to a respective first coordinate. For each first coordinate, a measure of dependence is calculated and the calculated measure of dependence is used to detect changes in the reservoir over time. | 05-26-2016 |
| 20160161619 | SYSTEMS AND METHODS FOR ALIGNING A MONITOR SEISMIC SURVEY WITH A BASELINE SEISMIC SURVEY - Systems, methods, and mediums may implement obtaining baseline traces of a baseline seismic survey and monitor traces of a monitor seismic survey; employing a computer to align the monitor traces to corresponding baseline traces using an error function having a phase-based component, thereby obtaining an aligned monitor survey; generating with the computer a comparison of the aligned monitor survey to the baseline seismic survey; and using the comparison of the aligned monitor survey to the baseline seismic survey to determine a change in the subterranean hydrocarbon producing reservoir. | 06-09-2016 |
| 20160202375 | Eikonal Solver for Quasi P-Waves in Anisotropic Media | 07-14-2016 |
| 20160252637 | APPARATUS AND TECHNIQUES FOR ACOUSTIC LOGGING TOOL MODELING | 09-01-2016 |
