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9043155 
Matching pursuitbased 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 processorbased machine to, in an iterative process, determine basis functions,... 

8981971 
Waveletbased 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 3D 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 Pwave primary energy and the coherent wave noise energy. The Pwave primary energy is modeled first and then... 

7388808 
Method for depth migrating seismic data using prestack time migration, demigration, and poststack depth migration
A method is disclosed for depth migrating seismic data. The method includes prestack time migrating the seismic data to form a stacked, time migrated image. The stacked, time migrated image is... 

7355923 
Seismic analysis using postimaging seismic anisotropy corrections
System and method for performing anisotropy corrections of postimaging seismic data for a subsurface formation. The method may receive seismic data, preferably prestack 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 nearsurface material information
The invention concerns a method for retrieving local nearsurface material information including the steps of:—providing a group of receivers comprising at least one buried receiver and at least... 

7065004 
Horizonbased 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 velocitydepth 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 Pwave 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 nonhyperbolic effective velocity model so as to take... 

6898148 
Multistep receivermotion 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 multistep process to reduce... 

6798714 
Method of performing stretchfree normal moveout (NMO) and stacking of seismic traces
A method of performing normal moveout (NMO) correction and stacking of a commonmidpoint (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 timealigning multiple offset seismic data volumes
Nearoffset and faroffset seismic data volumes are timealigned by first selecting a plurality of time shifts. The nearoffset and faroffset seismic data volumes are crosscorrelated 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 amplitudeversusoffset 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 amplitudeversusoffset (AVO) analysis is disclosed. The system and method retrieve... 

6026057 
Method and system for correcting for offsetdependent 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 finitedifference 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 (TAUPQ) transforms
Marine seismic data sets are generally undersampled 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 timeshift 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 preDMO steps to the traces, applying a special... 

5684754 
Method and system for correcting seismic traces for normal moveout stretch effects
A computerimplemented 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 shotrecord migration
A method of seismic shotrecord 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 twoway 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... 