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8879355 3-D harmonic-source reverse time migration systems and methods for seismic data analysis  
Computing device and method for processing seismic traces to produce an image of a subsurface area. The method includes receiving a series of seismic traces related to the subsurface area and...
8830788 Sensitivity kernal-based migration velocity analysis in 3D anisotropic media  
Seismic imaging systems and methods that employ sensitivity kernel-based migration velocity analysis in 3D anisotropic media may demonstrate increased stability and accuracy. Survey data analysts...
8797827 Seismic acquisition system  
Various technologies for a seismic acquisition system, which may include an acquisition central system configured to determine a desired start time for a sweep cycle in one or more vibrators and a...
8773951 System and method for seismic imaging with reduced computational cost  
A computer-implemented method, system, and article of manufacture for generating images of a subsurface region are disclosed. The method includes obtaining seismic data and an earth model related...
8767508 Using seismic P and S arrivals to determine shallow velocity structure  
Method for estimating a model of seismic velocity in a subsurface region from seismic data (31) recorded on 3-component instruments. The method measures the apparent incidence angle (32) of a...
8743656 Method of seismic data processing  
The invention relates to a method of seismic data processing, wherein the data includes a set of seismic traces, with each trace including a signal that has been recorded by a sensor after having...
8614578 Attenuation of electromagnetic signals passing through conductive material  
The present disclosure relates to determining the attenuation of an electromagnetic signal passing through a conductive material. An antenna is provided and placed in relatively close proximity to...
8594962 Distributing a clock in a subterranean survey data acquisition system  
A technique includes determining a first difference between a time that a first network element of a seismic acquisition network receives a first frame pulse from a second network element of the...
8594939 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...
8559270 Method for separating independent simultaneous sources  
This is a method of separating simultaneous sources that uses an inversion-type approach. Each source will preferably activated at a random time with respect to the others. These random delays...
8395967 Vector migration of virtual source VSP data  
A walkaway VSP survey is carried out with receivers located in a borehole under a salt overhang. Redatuming of the multicomponent data to virtual sources in the borehole followed by vector...
8385151 Reverse time migration with absorbing and random boundaries  
Images relating to a subsurface region may be generated based at least in part on a backward propagated source wavefield and a receiver wavefield. A source wavefield may be propagated from an...
8295124 Method for separating independent simultaneous sources  
This is a method of separating simultaneous sources that uses an inversion-type approach. Each source will preferably activated at a random time with respect to the others. These random delays...
8228757 Synchronization of modules in a wireless array  
Presented are systems and methods for wireless data acquisition. The wireless data acquisition may involve synchronizing modules within a data acquisition array. The synchronized data acquisition...
8218394 Method for imaging the earths subsurface using passive seismic interferometry and adaptive velocity filtering  
A method of imaging the Earth's subsurface using passive seismic interferometry tomography includes detecting seismic signals from within the Earth's subsurface over a time period using an array...
8203907 Updating velocity models using migration velocity scans  
Method for updating a velocity model (926) for migrating seismic data using migration velocity scans with the objective of building a model that reproduces the same travel times that produced...
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,...
8125848 Acoustic logging-while-drilling tools having a hexapole source configuration and associated logging methods  
Multipole acoustic logging-while-drilling (LWD) tools and associated methods are disclosed herein. In some embodiments, the disclosed acoustic LWD tool comprises a transmitter array and at least...
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...
8116168 Hybrid one-way and full-way wave equation migration  
A migration method using hybrid one-way and full-way (HOF) wave equation propagation. The HOF method extrapolates seismic wavefields in less complex media with a one-way wave equation propagator...
7894299 Converted mode seismic survey design  
Method for designing a converted mode (PS or SP) seismic survey to accomplish specified vertical and lateral resolution objectives at target depth. An equation (181) is provided for determining...
7870169 Method for enabling traceability and recovery from errors during migration of software applications  
A method (which can be computer implemented) for addressing errors during migration of software applications includes the step of obtaining access to a data repository, which includes a listing of...
7746726 Method for processing borehole seismic data  
Seismic data recorded by subsurface seismic sensors placed in a borehole, such as an oil or gas well, are transformed via a process of upward wavefield propagation to pseudo-receivers at the...
7693006 Vector migration of 1st order free-surface related downgoing multiples from VSP data  
1st order free-surface multiples recorded in VSP data or reverse VSP data are processed using a 3-C 3-D vector migration method to produce an image of the subsurface. This image produces a larger...
7660201 Autonomous seismic data acquisition unit  
A method, apparatus and system for acquiring land seismic data includes acquiring seismic data with a first autonomous seismic data acquisition unit and a second autonomous seismic data...
7626887 Displacement field calculation  
Implementations of various technologies for a method for processing seismic data. In one implementation, the method includes (a) selecting a first trace from a first seismic data set and a second...
7609585 Method for sub-salt migration velocity analysis  
A method for interpreting seismic data below a salt layer includes depth migrating the seismic data to a bottom of the salt layer. The migrating including generating an initial model of velocities...
7583560 Synchronization of seismic data acquisition systems  
A network distributed seismic data acquisition system comprises seismic receivers connected to remote acquisition modules, receiver lines, line tap units, base lines, a central recording system...
7505360 Fast 3-D surface multiple prediction  
A method and apparatus for predicting a plurality of surface multiples for a plurality of traces in a record of seismic data. In one embodiment, the method includes providing a plurality of target...
7460437 Seismic data processing method and system for migration of seismic signals incorporating azimuthal variations in the velocity  
A method and system for seismic data processing utilizes azimuthal variations in the velocity of seismic signals. The system and method utilizes a plurality of seismic energy sources that are...
7447113 Kirchhoff prestack time migration method for PS waves  
A method is disclosed for migrating seismic data which includes determining travel time of a compressional wave from a source location to a scatter point, taking into account ray bending. Travel...
7436735 Method for seismic processing, in particular for compensating birefringence on seismic traces  
A method of seismic processing for obtaining information on the geophysics of the subsoil includes acquiring seismic traces at at least one point on the surface of the subsoil or in the subsoil,...
7414919 Method for improving the seismic resolution  
A method for improving the seismic resolution in the field of petroleum exploration and development, using the steps of: (1) ensuring the depth and the velocity of the low-velocity layer and the...
7400553 One-return wave equation migration  
A one-return wave equation migration is used to extrapolate both down-going and up-going waves. Followed by a properly designed imaging condition, the partial image contributed form turning waves...
7397728 Method for processing a record of seismic traces  
An apparatus and method for processing a record of seismic traces. The method includes receiving the record of seismic traces in a time-offset domain, transforming the record of seismic traces to...
7388808 Method for depth migrating seismic data using pre-stack time migration, demigration, and post-stack depth migration  
A method is disclosed for depth migrating seismic data. The method includes pre-stack time migrating the seismic data to form a stacked, time migrated image. The stacked, time migrated image is...
7359284 Method for processing borehole seismic data  
Seismic data recorded by subsurface seismic sensors placed in a borehole, such as an oil or gas well, are transformed via a process of upward wavefield propagation to pseudo-receivers at the...
7355923 Seismic analysis using post-imaging seismic anisotropy corrections  
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...
7345951 Method of determining specular information after prestack seismic imaging  
Method of determining the specular source/receiver pairs associated with seismic images produced from a transformation of multi-offset seismic wave records as a function of time in the depth...
7321526 Method and apparatus for water velocity decomposition  
The present invention provides a method for analyzing traces collected along a plurality of adjacent sail lines in a marine seismic survey area. The method comprises selecting a plurality of trace...
7196969 Three-dimensional two-way acoustic wave equation pre-stack imaging systems and methods  
A system and method for pre-stack imaging system that includes multiple processors, with each processor configured to perform two-way wave equation-based forward wave propagation of a source event...
7167414 Amplitude preserving prestack migration method  
A method is disclosed for amplitude preserving Kirchhoff time migration. The method includes calculating estimates of the geometrical spreading terms using a constant velocity approximation....
7099417 Trace video filtering using wavelet de-noising techniques  
A filter that includes an analyzer, thresholding circuit, and synthesizer. The analyzer generates a low-frequency component signal and a high-frequency component signal from an input signal. The...
7085195 Method for detecting earth formation fractures by seismic imaging of diffractors  
A method is disclosed for seismic imaging of subsurface diffractors. The method includes performing migration velocity analysis on a seismic time record section and depth migrating the time...
7065004 Horizon-based residual depth migration velocity analysis  
A method is disclosed for processing seismic data. The method includes prestack depth migrating the seismic data to generate common image gathers using an initial velocity-depth model. Horizons in...
6985405 Method for stable estimation of anisotropic parameters for P-wave prestack imaging  
A method is disclosed for determining interval anisotropic parameters. The method includes determining normal moveout (NMO) velocities and effective anelliptical parameters from seismic data...
6982928 Seismic P-wave velocity derived from vibrator control system  
P-wave velocity in a near-surface region of a land area is estimated from a combination of seismic data based upon waves in the near-surface region generated in response to a shock in each of a...
6956790 Borehole sonic data processing method  
A method of processing sonic wireline or logging while drilling data acquired in a borehole that includes filtering the sonic data to attenuate tool-borne and borehole-borne arrivals; migrating...
6898147 System for estimating azimuthal variations in seismic data  
The invention comprises a system for processing seismic data to estimate time shift resulting from velocity anisotropy in the earth's subsurface. A gather of seismic data traces is formed and...
6898148 Multi-step receiver-motion compensation  
The present invention provides methods to be used in seismic data processing to address problems encountered during data acquisition. The present invention provides a multi-step process to reduce...

Matches 1 - 50 out of 165 1 2 3 4 >