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| Number | Title | Issue Date |
| 6865488 | Method of using cascaded sweeps for source coding and harmonic cancellation A method of seismic surveying using one or more vibrational seismic energy sources activated by sweep signals. The highest order harmonic that has sufficient strength to cause significant harmonic distortion of a sweep segment is determined. A number of sweep segmen... | 03/08/2005 |
| 6865487 | Method for decimating seismic traces driven by the seismic path A method for decimating seismic traces in an acquisition of 3D data, recording, for each trace, the corresponding source-receiver couple coordinates (Sa1, Ra1), positioning on a decimation grid (D), divided into cells, the source-receiver coupl... | 03/08/2005 |
| 6865486 | Method of using underbalanced well data for seismic attribute analysis The present invention generally provides methods of geological analysis. The method includes collecting wellbore data from a well undergoing underbalanced drilling. The wellbore data is then correlated to a seismic data to predict geological properties away from the... | 03/08/2005 |
| 6862531 | Layer stripping converted reflected waveforms for dipping fractures A method and apparatus for use in seismic prospecting are disclosed. The method comprises partitioning a plurality of converted split shear-wave data resulting from a common event and recorded at a plurality of azimuths and a plurality of offsets as a function of th... | 03/01/2005 |
| 6859416 | Apparatus and method for analyzing correlation between geophysical data and seismic data, geophysical data monitoring apparatus and method, and earthquake monitoring method The present invention relates to an apparatus and a method for analyzing the correlation geophysical data and seismic data, physical data monitoring apparatus and method, and an earthquake monitoring method. ... | 02/22/2005 |
| 6859734 | Method and system for limited frequency seismic imaging The method and system of the present inventions provides a new approach for selecting frequencies comprising a minimal or limited frequency data set for imaging leading to an order of magnitude decrease in computation resources. Seismic data are acquired and transfo... | 02/22/2005 |
| 6856912 | Removing irregularities from seismic data caused by tube waves Method of removing irregularities caused by tube waves from seismic data obtained in a borehole seismic survey, using a set of seismic or sources and a set of seismic receivers each arranged in a borehole, in which seismic data is time shifted based on an estimated ... | 02/15/2005 |
| 6856911 | Pseudo-offset migration A method of migration of a seismic data is disclosed. The data include a data point having an input source location, an input receiver location, and a scatter point associated therewith. The method includes determining a projected source location, and determining a ... | 02/15/2005 |
| 6853922 | System for information extraction from geologic time volumes In a preferred embodiment the invention comprises a system for analyzing seismic data which includes selecting a geologic time volume for a subsurface region of interest and selecting a procedure for generating a derived data volume based on the geologic time volume... | 02/08/2005 |
| 6853921 | System and method for real time reservoir management A method of real time field wide reservoir management comprising the steps of processing collected field wide reservoir data in accordance with one or more predetermined algorithms to obtain a resultant desired field wide production/injection forecast, generating a ... | 02/08/2005 |
| 6846133 | Marine seismic surveying A method of performing a seismic survey of earth formations beneath a body of water is disclosed. The method includes: (a) deploying a seismic cable having a plurality of seismic sensors distributed therealong in close proxmity to elongate locating means provided at... | 01/25/2005 |
| 6847895 | Method for facilitating recognition of objects, notably geologic objects, by means of a discriminant analysis technique The invention is a method for facilitating recognition of objects, using a discriminant analysis technique to classify the objects into predetermined categories. A learning base comprising objects that have already been recognized and classified into predetermined c... | 01/25/2005 |
| 6847896 | Seismic data acquisition method and apparatus A method of acquiring seismic data adapted for a land or transition zone environment including placing a location identifier in a particular location, placing a seismic sensor near the location identifier, reading the location identifer using a seismic data cable, r... | 01/25/2005 |
| 6845325 | Global classification of sonic logs A method of determining the sonic slowness of a formation traversed by a borehole comprising generating tracks from sonic waveform peaks received at a plurality of depths wherein the peaks that are not classified prior to tracking is set forth. A method for generati... | 01/18/2005 |
| 6842725 | Method for modelling fluid flows in a fractured multilayer porous medium and correlative interactions in a production well A method is disclosed for modelling fluid flows in a fractured multilayer porous medium by accounting for the real geometry of the fracture network and the local exchanges between the porous matrix and the fractures at each node of the network, thus allowing simulat... | 01/11/2005 |
| 6842701 | Method of noise removal for cascaded sweep data The present invention is a method for processing seismic data comprising acquiring seismic data using a sweep sequence including a plurality of cascaded sweep segments. The seismic data include a plurality of data segments and a listen time. The listen is combined w... | 01/11/2005 |
| 6834252 | Method of and apparatus for analyzing population distribution, and computer product The population distribution analyzing apparatus is provided with the area setting unit which sets an area in which population distribution of a plurality of users respectively carrying a portable terminal therewith is to be analyzed; the positional information acqui... | 12/21/2004 |
| 6834235 | Method of and apparatus for processing seismic data A method of processing multi-component seismic data acquired at a receiver comprises determining a suitable decomposition scheme to use. This makes use of the existence of pairs of wavefield components that are uncoupled from one another. If there is no physical cou... | 12/21/2004 |
| 6832160 | Method for finding reflectivity of reflectors Method for solving the classical inversion problem of finding the angle dependent reflection coefficients along selected reflectors in the subsurface. The input data to the method include seismic constant offset or constant angle data cubes from Pre-Stack Depth Migr... | 12/14/2004 |
| 6829570 | Oilfield analysis systems and methods An oilfield data analysis system is based on a four-tier software model which includes a “shared earth model” and a federation of “directory services”. The first tier is a universal graphical user interface (GUI) which can operate on any inexpensive computer... | 12/07/2004 |
| 6826501 | Method and apparatus for estimating water bottom reflection time difference The present invention provides a method for reducing water bottom reflection time differences. The method includes selecting a plurality of trace groups, each trace having an offset from a midpoint and a water bottom reflection time. The method also includes determi... | 11/30/2004 |
| 6826485 | Determination of the fast and slow shear wave polarisation directions A method of determining the polarisation directions of the fast and slow shear waves arising from shear wave splitting due to anisotropy, said directions defining a natural coordinate system, the method comprising the steps of: a) ... | 11/30/2004 |
| 6826484 | 3D prestack time migration method A method is disclosed for migrating seismic data. The method includes selecting an image point and generating an initial model of seismic velocity with respect to time. The initial model includes substantially horizontal layers each having a selected interval veloci... | 11/30/2004 |
| 6826483 | Petroleum reservoir simulation and characterization system and method A single intranet, internet, or World Wide Web-accessible interface is provided for, initiation of, interactive adjustments to, and access to the outputs of an integrated workflow of a plurality of analytical computer applications for characterization and analysis o... | 11/30/2004 |
| 6823266 | Method for performing object-based connectivity analysis in 3-D seismic data volumes A method for predicting the connectivity of seismic objects identified by seed detection or similar methods. ... | 11/23/2004 |
| 6820074 | Null-line based radial interpolation of gridded data A method and software are disclosed for processing data values of a data array at equally spaced locations in two dimensions where the desired data values are nulls in the data array. The method and software first searches for linear ranges of contiguous nulls, and ... | 11/16/2004 |
| 6819628 | Wave migration by a krylov space expansion of the square root exponent operator, for use in seismic imaging Seismic imaging apparatus for receiving data propagated through sub-surface structure from a seismic source to at least one seismic receiver and forming an image therefrom, the apparatus comprising: an imager for forming an initial image from said data including ini... | 11/16/2004 |
| 6813565 | Method for gradually deforming sequential simulations of a heterogeneous environment such as an underground zone A method of gradual deformation of representations or realizations, generated by sequential simulation, not limited to a Gaussian stochastic model of a physical quantity z in a meshed heterogeneous medium, in order to adjust the model to a set of data relative to th... | 11/02/2004 |
| 6804609 | Property prediction using residual stepwise regression A method for predicting reservoir properties at an unexplored subterranean location based on known seismic attributes at the unexplored subterranean location, as well as known reservoir properties and seismic attributes at a plurality of explored subterranean locati... | 10/12/2004 |
| 6801858 | Method for facilitating monitoring, in the course of time, of the evolution of physical states in an underground formation A method for facilitating monitoring, in the course of time, of the evolution of the physical states of a zone of an underground formation such as a reservoir by using and interpreting 4D seismic data. The method uses seismic pattern recognition, more particularly a... | 10/05/2004 |
| 6791901 | Seismic detection apparatus and related method Seismic detection apparatus comprising seismic detection means capable of detecting a plurality of seismic components over a defined tetrahedral volume is provided. The seismic detection means comprises four three-component geophones. Seismic data acquired by the ge... | 09/14/2004 |
| 6791899 | Acoustic logging apparatus and method for anisotropic earth formations The patent discloses a signal processing technique for determining the fast and slow shear wave polarizations, and their orientation, for acoustic waves in an anisotropic earth formation. The signal processing method decomposes composite received waveforms a number ... | 09/14/2004 |
| 6785612 | Seismic velocity update for anisotropic depth migration A method of updating velocity whereby corresponding reflections are identified from P-P and P-S near-offset waves received from a seismic source and reflected by a subsurface layer to form P-P and P-S depth consistent image gathers. A joint velocity inversion in dep... | 08/31/2004 |
| 6775619 | Neural net prediction of seismic streamer shape A neural network to predict seismic streamer shape during seismic operations having an input layer, an optional hidden layer, and an output layer, each layer having one or more nodes. The first layer comprises input nodes attached to seismic data acquisition operati... | 08/10/2004 |
| 6775618 | Method and system for reducing effects of sea surface ghost contamination in seismic data An improved de-ghosting method and system that utilizes multi-component marine seismic data recorded in a fluid medium. The method makes use of two types of data: pressure data that represents the pressure in the fluid medium, such as sea water, at a number of locat... | 08/10/2004 |
| 6772068 | Quality control of data A method of monitoring the quality of data is disclosed. The method includes sampling a first acquired data trace to determine the amplitude of the trace at a plurality of sampling times; and determining first and second attributes for the acquired first data trace ... | 08/03/2004 |
| 6772067 | Acoustic logging apparatus and method for anisotropic earth formations The patent discloses a signal processing technique for determining the fast and slow shear wave polarizations, and their orientation, for acoustic waves in an anisotropic earth formation. The signal processing method decomposes composite received waveforms a number ... | 08/03/2004 |
| 6768947 | System and method for accessing and analyzing previous generations of seismic data A system and method for uniquely identifying seismic data sets, wherein the system and method associate a unique seismic data set identifier with a seismic data set, wherein the unique seismic data set identifier identifies the seismic data set by being different fr... | 07/27/2004 |
| 6763305 | Subsurface illumination, a hybrid wave equation-ray-tracing method A method for improving illumination analysis in seismic data having steps of: selecting a model of the medium, a source and a receiver, a reflecting surface, finding a reflection point and the associated Fresnel zone according to Fermat principle using ray tracing, ... | 07/13/2004 |
| 6763304 | Method for processing seismic data to attenuate multiples A seismic data set is processed by selecting a set of gathers in the seismic data set. A frequency independent constraint matrix is calculated in a first gather. A model solution in at least one second gather is calculated by using the constraint matrix in a high-re... | 07/13/2004 |
