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| Number | Title | Issue Date |
| 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 the steps of: a) defining an equatio... | 03/27/2012 |
| 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 (dtn, τo), for each node (dtn, τo) defined in... | 03/20/2012 |
| 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 (dtn, τo), for each node (dtn, τo) defined in... | 02/15/2011 |
| 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 the steps of: a) defining an equatio... | 09/28/2010 |
| 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) gathers, generating a semblance spectrum for each ICMP gather, stacking the ... | 09/28/2010 |
| 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 with respect to depth from seismic data. An initial estimate is generated... | 02/16/2010 |
| 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 arrival times of the recorded PP data using an estimated average gamma ... | 02/09/2010 |
| 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) gathers, generating a semblance spectrum for each ICMP gather, stacking the ... | 11/04/2008 |
| 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 subtracted from the input data. The data with the P-wave primary energy removed... | 10/07/2008 |
| 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 demigrated, and post-stack depth migration is then performed on the demi... | 06/17/2008 |
| 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 plurality of traces, e.g., collected from a plurality of source and r... | 04/08/2008 |
| 7343245 | Method of processing seismic data to extract and portray AVO information A method of seismic analysis is disclosed for extracting information relating to lithology, porosity, fluids, and AVO types and/or displaying the extracted information. In one possible embodiment, AVO points are plotted and a distance and/or angle is utilized for ex... | 03/11/2008 |
| 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 angle of the wave vector from an axis and performing a slowness deter... | 01/01/2008 |
| 7257492 | Handling of static corrections in multiple prediction A method is for use in seismic data processing includes improving the continuity of the primary events in an original seismic dataset to create a continuous, seismic dataset; predicting at least the first order multiples of the original seismic dataset from the cont... | 08/14/2007 |
| 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 reflection interference effects due to normal moveout. Stretch factors Î... | 06/12/2007 |
| 7197399 | Method of multiple attenuation According to a preferred aspect of the instant invention, there is provided herein a system and method for removing or attenuating multiples in datasets that is much more efficient than methods used heretofore. The increases in efficiency principally originate in tw... | 03/27/2007 |
| 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. Takeoff and emergence angles are accurately calculated based on a model of ... | 01/23/2007 |
| 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 one surface receiver positioned either at or very near the Earth surf... | 12/26/2006 |
| 7149630 | Method of DMO calculation for use in seismic exploration According to a preferred aspect of the instant invention, there is provided herein a system and method for improving the computational efficiency of the DMO transformation that has many uses in the seismic processing arts. More particularly, the instant inventor has... | 12/12/2006 |
| 7117093 | Method, media, and signals for processing seismic data to obtain a velocity field A method and apparatus for estimating a seismic velocity field from seismic data including time-amplitude representations associated with source-receiver locations spaced apart by an offset distance and having a midpoint therebetween, the seismic data being arranged... | 10/03/2006 |
| 7095677 | Crossplot analysis of A.V.O. anomolies in seismic surveying A method of seismic data analysis to provide clustering of A.V.O. data into A.V.O. anomaly types, the method comprising: obtaining successive values of a plurality of seismic attributes, each seismic attribute comprising a respective property of a seismic reflection... | 08/22/2006 |
| 7082368 | Seismic event correlation and V-Vestimation A method of correlating seismic events associated with different types of seismic transmission modes and includes calculating a shift estimate between a first set of seismic events or attributes associated with the seismic events attributable to one type of transmis... | 07/25/2006 |
| 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 the migrated seismic data are selected. Residual migration velocity a... | 06/20/2006 |
| 7031223 | Method for correcting seismic data for receiver movement during data acquisition A method is disclosed for processing seismic data. The method includes determining a position of a seismic energy source and seismic receivers at a time of actuation of the source. A velocity of the seismic receivers with respect to the source position is determined... | 04/18/2006 |
| 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 memory of a graphics computer (10–14) using time... | 02/07/2006 |
| 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 traces. The NMO velocities are processed to obtain interval NMO velocities.... | 01/10/2006 |
| 6980688 | Method and apparatus for investigating integrity of structural member A method for investigating structural integrity utilizes a carrier member having a flexible surface and a plurality of electromechanical transducer elements attached to the carrier member, the transducer elements being spaced from each other along at least two spati... | 12/27/2005 |
| 6970397 | Determination of fluid properties of earth formations using stochastic inversion A method of determining a fluid property in a subsurface region of interest of an earth formation uses measurements of seismic attributes on seismic data. For a test region, a plurality of realizations of rock properties are specified, and for each of the realizatio... | 11/29/2005 |
| 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 account of the earth's layering and anisotropy. One preferred non-hyperbolic... | 11/22/2005 |
| 6954403 | Concurrent phase angle graphic analysis Waveform data, such as reflection seismic data, is filtered by concurrently analyzing various phase angles of the data. The various phase angles of the data are compared to phase rotated background trends and the phase angle producing the maximum deviation from the ... | 10/11/2005 |
| 6950371 | Method for signal-to-noise ratio enhancement of seismic data using frequency dependent true relative amplitude noise attenuation A method for enhancing signal-to-noise (S/N) ratio of seismic data is presented. An ensemble of input traces is decomposed into a plurality of frequency bands of traces. Trace and signal power and then a maximum allowable signal-to-noise ratio are estimated for each... | 09/27/2005 |
| 6917881 | Method for determining primary static corrections to be applied to seismic traces A method is disclosed for determining, without carrying out a well-velocity survey or making a priori assumption on the velocity of the first medium, the primary static corrections to be applied to sets of seismic traces after seismic prospecting operations in an un... | 07/12/2005 |
| 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 aliasing of seismic data along time slices. ... | 05/24/2005 |
| 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 correction is modeled as the sum of a series of short overlapping time ... | 09/28/2004 |
| 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 plurality of time shifts. An initial time-shift volume and a maximum corre... | 06/29/2004 |
| 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 and a far offset stack, the time difference between the two, a mute patt... | 06/29/2004 |
| 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 utilizing these relative changes and plottings for gas/oil explorat... | 07/18/2000 |
| 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 common midpoint gathers of the seismic signals, and generate... | 05/02/2000 |
| 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 and system, the horizontal and vertical seismic signal tra... | 02/15/2000 |
| 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 conditions at the artificial boundary. In this method one b... | 12/07/1999 |
