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9043155 Matching pursuit-based apparatus and technique to construct a seismic signal using a predicted energy distribution  
A technique includes processing seismic data indicative of samples of at least one measured seismic signal in a processor-based machine to, in an iterative process, determine basis functions,...
8981971 Wavelet-based seismic data compression  
This invention is for a method for transforming a seismic trace into a compressed domain. The seismic source wavelet is transformed into a zero degree phase wavelet and a shifted 90 degree phase...
8965706 Noise filtering of seismit data  
Adaptive filtering method to remove ground roll from seismic data. In an M channel adaptive filter, weights Wi are set using an adaptive algorithm based on seeking the minimum in the partial...
8547792 Processing seismic data  
A method of processing seismic data including convolving at least first and second seismic data traces or respective portions of at least first and second seismic data traces to forma composite...
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...
8139441 Method for bispectral picking of anelliptical NMO correction parameters  
Method of determining the velocity V and anellipticity η parameters for processing seismic traces in a common midpoint (CMP) gather comprising:—a preliminary step to define a plurality of nodes...
7889599 Method for bispectral picking of anelliptical NMO correction parameters  
Method of determining the velocity V and anellipticity η parameters for processing seismic traces in a common midpoint (CMP) gather comprising:—a preliminary step to define a plurality of nodes...
7804740 Processing seismic data using interferometry techniques  
Method for processing seismic data. In one implementation, the method includes converting a common midpoint (CMP) gather of seismograms into one or more interferogram common midpoint (ICMP)...
7804739 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 organised according to one or several acquisition parameters, comprising...
7796468 Prediction of shallow drilling hazards using seismic refraction data  
Shallow drilling hazards (44), such as karsts, caves, voids and unconsolidated discontinuities, that can pose significant risks to exploration and development well drilling operations are detected...
7778110 Processing seismic data representative of the acceleration wavefield  
A method of processing seismic data comprises processing data representative of the acceleration wavefield so as to obtain information about the earth's subsurface direct from the seismic data...
7663972 Method for three dimensional seismic travel time tomography in transversely isotropic media  
A method for estimating seismic velocities in vertically transversely isotropic media includes generating an initial estimate of vertical interval velocity and interval normal moveout velocity...
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...
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...
7447115 Processing seismic data using interferometry techniques  
Method for processing seismic data. In one implementation, the method includes converting a common midpoint (CMP) gather of seismograms into one or more interferogram common midpoint (ICMP)...
7433265 Converted wave energy removal from seismic data  
Coherent wave noise energy is removed from seismic data by modeling both the P-wave primary energy and the coherent wave noise energy. The P-wave primary energy is modeled first and then...
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...
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...
7315783 Traveltime calculation in three dimensional transversely isotropic (3D TI) media by the fast marching method  
A technique for calculating traveltime of a seismic wave in three dimensional tilted transversely isotropic (3D TI) media includes determining a wave vector, defining a unit vector, calculating an...
7230879 Method and apparatus for true relative amplitude correction of seismic data for normal moveout stretch effects  
The present invention provides a method and apparatus for arriving at true relative amplitude destretched seismic traces from stretched seismic traces. The method compensates for offset varying...
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....
7154812 Method for retrieving local near-surface material information  
The invention concerns a method for retrieving local near-surface material information including the steps of:—providing a group of receivers comprising at least one buried receiver and at least...
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...
6996028 Velocity analysis on seismic data  
A number of seismic stacks are precomputed (20) for known velocity fields. The velocity fields are chosen to span the range of velocities of interest. The stacks are then arranged (21) in the 3D...
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...
6967898 Method of processing vertical seismic profile data using effective VTI models  
A method of applying an effective velocity model to vertical seismic profile (VSP) seismic data comprises correcting for offset using a non-hyperbolic effective velocity model so as to take...
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...
6798714 Method of performing stretch-free normal moveout (NMO) and stacking of seismic traces  
A method of performing normal moveout (NMO) correction and stacking of a common-midpoint (CMP) gather of seismic traces in a manner that avoids NMO stretch is disclosed. A CMP gather without NMO...
6757216 Method for post processing compensation of amplitude for misaligned and misstacked offset seismic data  
A method for assessing the suitability of seismic data for quantitative amplitude analysis, where the concern is excessive residual normal moveout (RNMO). The invention uses a near offset stack...
6757217 Method for time-aligning multiple offset seismic data volumes  
Near-offset and far-offset seismic data volumes are time-aligned by first selecting a plurality of time shifts. The near-offset and far-offset seismic data volumes are cross-correlated at the...
6091669 Method of determining, displaying and using the relative changes of elastic modulus and density of underground rock  
The general object of the present invention is to provide a method for determining and displaying the relative changes of elastic moduli and that of density of geologic formations and for...
6058074 Method and system for detecting hydrocarbon reservoirs using amplitude-versus-offset analysis with improved measurement of background statistics  
A computer system and method of operating the same to apply overburden corrections to seismic signals prior to amplitude-versus-offset (AVO) analysis is disclosed. The system and method retrieve...
6026057 Method and system for correcting for offset-dependent directivity effects in seismic survey signals  
A method and computer system for correcting seismic signals in a seismic survey, sensed in horizontal and vertical directions at receiver locations, is disclosed. According to the disclosed method...
5999488 Method and apparatus for migration by finite differences  
An improved method for eliminating reflections from artificial model boundaries encountered in finite-difference acoustic wave propagation computations is based on applying two different boundary...
5999487 Seismic reflection data acquisition and processing method and device for prospecting in tectonically complex environments  
A seismic reflection data acquisition and processing method and device for prospecting in tectonically complex environments are disclosed. In particular, the seismic reflection data acquisition...
5991237 Method for the determination of migration velocities in seismic processing  
A method for the determination of migration velocities in seismic processing in which a blasting point S is associated with receivers (R1 to Rn) which are separated by offsets such that in a given...
5982706 Method and system for determining normal moveout parameters for long offset seismic survey signals  
A method and computer system for deriving and applying normal moveout corrections to seismic survey traces is disclosed. In each common midpoint (CMP) gather, a stacking velocity function of...
5978314 Method for determining seismic velocities  
A method for determining a substantially optimal NMO velocity function for use in stacking a CMP gather of seismic data traces. The method begins with an initial estimate of the NMO velocity...
5970023 Reducing aliasing artifacts in seismic data processing using sharpened (TAU-P-Q) transforms  
Marine seismic data sets are generally under-sampled spatially because of the relatively long listening times required in deep water. It is customary to use very long spreads in the field thereby...
5933789 Method and system for applying dispersive normal moveout corrections to seismic survey signals  
A method and computer system for deriving and applying normal moveout phase and time shift corrections to seismic survey traces is disclosed. Normal moveout time-shift corrections are first...
5719822 Seismic data radon dip moveout method  
A method of processing seismic signal data that uses a special Radon transform for dip moveout (DMO) including the steps of applying conventional pre-DMO steps to the traces, applying a special...
5684754 Method and system for correcting seismic traces for normal move-out stretch effects  
A computer-implemented method and system of correcting seismic survey data for the effects of NMO stretch is disclosed. The method operates upon a CDP gather of seismic survey data after normal...
5663928 Method for analysing and processing seismic reflection data for the determination of a high resolution spatial velocity field for hyperbolicity correction  
A method of analysing and processing seismic reflection data for the determination of a high resolution spatial hyperbolicity correction velocity field.The method is characterised in that: for the...
5596546 Spatially distributed signal sampling method  
A method of preserving frequency components in digitally sampled signals exceeding a maximum frequency related to a predetermined digital sample interval. The signals correspond to a plurality of...
5555530 Method for improving signal to noise ratio  
A method for improving the signal to noise ratio from a pair of detectors such as geophones which each detect a noisy signal comprising a signal of interest (S) and a noise signal (N), wherein the...
5544126 System and method of seismic shot-record migration  
A method of seismic shot-record migration includes the steps of generating seismic or acoustic waves into an earth formation from one or more sources with the sources being spaced some finite...
5521881 Method of processing seismic data having multiple reflection noise  
Disclosed is a method of processing seismic data containing multiples, which method generally includes as a step, determining the two-way travel time to a suspected multiple generating event. This...
5515335 Seismic trace overburden correction method  
A method for generating improved displays of seismic data by processing seismic amplitude versus offset data to correct for overburden effects. Analytic traces are calculated for the zero offset...
5440525 Seismic data hydrocarbon indicator  
A method for displaying seismic data to provide direct indications of the presence of hydrocarbons. Seismic data is processed using conventional amplitude versus offset techniques to obtain zero...
5297108 Seismic velocity estimation method  
A method for detecting errors in estimated seismic velocities used in a normal moveout correction of a gather of traces selected from conventional, common midpoint seismic data. Zero offset...

Matches 1 - 50 out of 124 1 2 3 >