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8185316 |
Time-space varying spectra for seismic processing
A method and visualization apparatus for spectral analysis of time-and-space varying signals enables high resolution investigation of 3D seismic data for the exploration of oil and gas. The method...
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8164978 |
Interbed multiple prediction
A method and apparatus for predicting interbed multiples is described herein. Trace geometries may be generated for one or more desired shot-side traces, one or more desired receiver-side traces,...
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8144543 |
Seismic data processing method for RMO picking
The invention relates to a method of processing seismic data, the said seismic data comprising a gather of seismic traces organized according to one or several acquisition parameters, comprising...
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8139440 |
Spectral conditioning for surface seismic data
A method for spectrally conditioning surface seismic data. In one implementation, the method may include correcting surface seismic data for distortions due to anomalous spectral amplitudes,...
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8126652 |
Azimuth correction for data reconstruction in three-dimensional surface-related multiple prediction
A best fitting trace in seismic data is determined for a desired trace to be reconstructed. An azimuth correction is calculated for the azimuth difference between the best fitting trace and the...
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8126651 |
Method for obtaining porosity and shale volume from seismic data
Method for obtaining rock parameters such as porosity and vshale directly from inversion of seismic data corresponding to a single trace location. This method is distinguished from existing methods...
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8121791 |
Spectral shaping inversion and migration of seismic data
A geophysical model of a subsurface region is generated based on seismic data, e.g., seismic reflection data. Migration and seismic inversion are applied to the seismic data to generate estimates...
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8095320 |
Method, program product, and system for suppression of residual water bottom energy in surface seismic data
Systems, program product, and methods of suppressing residual water bottom energy in seismic data, are provided. An example of a system, program product, and method can be applied to post-stack...
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8078406 |
Processing seismic data in common group-center gathers
A method for processing seismic data. The method includes plotting a travel-time curve and one or more actual times that each seismic receiver receives one or more seismograms on a graph. The...
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8064288 |
Method for passive seismic emission tomography using adaptive velocity filter
A method for seismic event mapping includes adaptively velocity filtering seismic signals recorded at selected positions. The velocity filtered signals are transformed into a domain of possible...
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8050892 |
Method, device, computer program and data carrier for modeling a multidimensional heterogeneous structure, using a digital processing unit
Method, apparatus, computer program and data carrier for modeling a multidimensional, heterogeneous structure using a digital processing unit, by means of a grid built up of stacks of...
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8022840 |
Telemetry transmitter optimization using time domain reflectometry
A method for enhancing downhole telemetry performance comprising enhancing a signal in order to offset signal-to-noise ratio reduction with increasing measured depth, wherein the signal is modified...
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7991589 |
Polarization analysis and polarization filtering of three-component signals using the S-transform
The present invention relates to a method and system for processing time-varying three-component signals to determine polarization dependent features therefrom. Relation data indicative of a...
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7987943 |
Apparatus and method for generating a seismic source signal
A seismic source signal generator includes a mass, a primary accumulator and a secondary accumulator, the secondary accumulator having an internal volume smaller than an internal volume of the...
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7986319 |
Method and system for dynamic, three-dimensional geological interpretation and modeling
Techniques and a system for performing geological interpretation operations in support of energy resources exploration and production perform well log correlation operations for generating a set of...
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7987054 |
Efficient multiple prediction in two and three dimensions
A method is disclosed that uses (a) source-receiver reciprocity and (b) a method such as ISR DMO (U.S. Patent Application Publication No. 2006/0098529) that allows reconstruction of densely sampled...
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7970546 |
Diplet-based imaging of seismic data in shot or receiver records
Methods, systems, and software for representing seismic shot or receiver data as a superposition of a plurality of diplets are disclosed. The method includes decomposing one or more prestack shot...
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7965899 |
Methods for locating and decoding distorted two-dimensional matrix symbols
A method is presented for processing an image of a two-dimensional (2D) matrix symbol having a plurality of data modules and a discontinuous finder pattern, each distorted by “donut effects”. A res...
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7957906 |
Method for attenuating low frequency noise in a dual-sensor seismic streamer
A calculated vertical velocity sensor signal is determined from a recorded pressure sensor signal. A constructed vertical velocity sensor signal is determined as a linear combination of the...
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7957221 |
Method for optimum combination of pressure and particle motion sensors for a 3-D spread of dual-sensor marine seismic streamers
A method for determining upgoing pressure components of seismic signals from signals detected by combined pressure responsive sensors and motion responsive seismic sensors disposed in a plurality...
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7957904 |
True amplitude transient electromagnetic system response measurement
A method for mapping sub-surface resistivity contrasts comprising making multi-channel transient electromagnetic (MTEM) measurements using at least one electric source with grounded input current...
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7953556 |
Geophone noise attenuation and wavefield separation using a multi-dimensional decomposition technique
Methods and apparatus for processing dual sensor (e.g., hydrophone and vertical geophone) data that includes intrinsic removal of noise as well as enhancing the wavefield separation are provided....
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7948826 |
Limited radon transformations for removal of noise from seismic data
Methods of processing seismic data to remove unwanted noise from meaningful reflection signals are provided for. The methods comprise the steps of assembling seismic data into common geometry...
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7941297 |
Noise measurement in video images
Methods and apparatus are described for measuring noise in video image processing. The described methods use horizontal and vertical variances of pixels of an image to extract noise information...
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7937224 |
Diplet-based seismic processing
Methods, systems, and software for generating a multi-dimensional volume are disclosed. The methods include decomposing one or more original volumes into a collection of diplets, wherein each...
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7881159 |
Seismic streamers which attentuate longitudinally traveling waves
A seismic streamer includes at least one array of sensors each disposed in a sensor holder at longitudinally spaced apart locations. A longitudinal orientation of at least one sensor or at least...
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7881154 |
Seismic processing for the elimination of multiple reflections
Seismic processing method, in which, in order to eliminate multiple reflections on seismic data, seismic data are migrated in time or in depth (110) arid the data thus migrated are processed to...
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7876642 |
Seismic data acquisition and source-side derivatives generation and application
The technologies described herein include systems and methods for encoding/decoding seismic sources and responses, generating and using of source-side derivatives while also generating and using...
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7869303 |
Method for noise suppression in seismic signals using spatial transforms
A method for identifying a position of a source of noise in a marine seismic record includes defining, for at least one shot record, a set of possible noise source positions. A difference between...
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7835223 |
Removing noise from seismic data obtained from towed seismic sensors
A technique includes obtaining different sets of data, which are provided by seismic sensors that share a tow line in common. Each data set is associated with a different spatial sampling interval....
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7835867 |
Determination of the bearing from a geophone to a seismic source
Techniques are disclosed for determining the bearing from a three-axis geophone to a seismic source, such as a person or other man-made seismic source. In one embodiment, the techniques are...
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7817061 |
Telemetry transmitter optimization using time domain reflectometry
A method for enhancing downhole telemetry performance comprising enhancing a signal in order to offset signal-to-noise ratio reduction with increasing measured depth, wherein the signal is modified...
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7805247 |
System and methods for well data compression
Systems and methods in which data compression techniques are utilized to fill a predetermined channel capacity are shown. According to one configuration, event data points within test data are...
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7805250 |
Methods and apparatus for geophysical exploration via joint inversion
Methods and apparatus are provided for generating velocity models for pre-stack depth migration (“PSDM”). Seismic, gravity and electromagnetic joint inversion input data are generated based on obs...
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7768423 |
Telemetry transmitter optimization via inferred measured depth
A method whereby a downhole drilling transmission device that communicates to the surface automatically modifies its transmission parameters in order that it substantially improves its ability to...
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7761237 |
Method for quantification and mitigation for dip-induced azimuthal AVO
This patent delineates methods for quantifying and mitigating dip-induced azimuthal AVO effects in seismic fracture detection using Azimuthal AVO analysis by accurately accounting for the...
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7742876 |
Wavefield decomposition for cross-line survey
It is described a method for spatially filtering 3D seabed seismic data acquired in a cross-line geometry including methods of how to decompose the data using a filter with two spatial components.
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7725266 |
System and method for 3D frequency domain waveform inversion based on 3D time-domain forward modeling
According to a first preferred aspect of the instant invention, there is provided an efficient method of computing a 3D frequency domain waveform inversion based on 3D time domain modeling. In the...
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7720609 |
Method of seismic signal processing
A method of assessing acquisition errors in seismic images in a seismic data volume. The method includes selecting a seismic attribute in a seismic data volume and then stacking seismic quality...
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7720607 |
Method for treating seismic cubes corresponding, for a common zone on the ground, to different source/receiver and/or angle of incidence offset values
Method for processing a set of seismic cubes corresponding to the same acquisition zone and at different source/receiver offset and/or angle of incidence values, characterized in that at least one...
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7715986 |
Method for identifying and removing multiples for imaging with beams
The present invention incorporates the use of model-driven and data-driven methodologies to attenuate multiples in seismic data utilizing a prediction model which includes multiply-reflected,...
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7714714 |
Systems and methods for situational feature set selection for target classification
Certain embodiments of the present invention provide a system for improved signal processing within a remote sensor system. The system includes a detection component and a classification component....
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7715988 |
Interpolating and deghosting multi-component seismic sensor data
A technique includes obtaining particle motion data and pressure data that are acquired by seismic sensors while in tow. The sensors are part of a plurality of streamers, and the pressure and...
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7710265 |
Systems and methods for dynamic situational signal processing for target detection and classification
Certain embodiments of the present invention provide a system for improved signal processing within a remote sensor system. The system includes a detection component and a processing component. The...
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7710264 |
Systems and methods for power efficient situation aware seismic detection and classification
Certain embodiments of the present invention provide a system for improved signal processing within a remote sensor system. The system includes a detection component and a processing component. The...
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7702463 |
Systems and methods for enhancing a seismic data image
Systems and methods for enhancing the resolution of a seismic data image displayed on a face of a sampling probe. The enhanced image represents a maximum resolution of at least a portion of the...
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7680600 |
Method, system and apparatus for formation tester data processing
A method for data processing includes transforming measurement data acquired in the time domain during an oilfield operation into a second domain to produce transformed data; identifying...
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7676327 |
Method for optimal wave field separation
A technique for decomposing a recorded wave field represented in a set of multicomponent, marine seismic data centers around a computer-implemented method including: estimating the statistics of...
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7664603 |
Electromagnetic wavefield analysis
A method of analyzing an electromagnetic wavefield includes the steps of measuring the electric and magnetic fields at at least one receiver, formulating a respective spatial domain filter in...
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7660202 |
PP/PS event matching (registration)
A method for generating an average gamma factor for recorded PS data and recorded PP data. The method includes mapping one or more arrival times of the recorded PS data onto one or more expected...
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