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| Number | Title | Issue Date |
| 6651006 | Method for processing seismic data The invention relates to a method for processing a seismic 2-D or 3-D measurement data set comprised of a multitude of seismic traces each comprising a series of data points provided with amplitude values. The inventive method is characterized by the foll... | 11/18/2003 |
| 6640190 | Estimating subsurface subsidence and compaction A method of processing first and second sets of data signals obtained through remotely sensing properties of the same subsurface area at different times comprising the steps of decomposing said first and second data sets into subvolumes of samples and gen... | 10/28/2003 |
| 6629037 | Optimal paths for marine data collection A method for finding an optimal path in seismic in fill shooting using a neural network to estimate cable feathering and uses multiple off set cost maps and potentials in cellular automata. The process determines cable coordinates at each cell location an... | 09/30/2003 |
| 6625543 | Output based azimuth moveout re-gridding of seismic data Input seismic data are re-gridded to an arbitrary output grid by output-based azimuth moveout. An input seismic data set corresponding to an input grid is used to generate an equivalent output seismic data set corresponding to an output grid different fro... | 09/23/2003 |
| 6625542 | Determining anisotropy in a stratum using scattered vertical and horizontal shear modes The present invention provides a system for, and method of determining anisotropy in a stratum using scattered horizontal shear and vertical shear modes. The method includes transforming seismic energy wave generated by a seismic energy source and receive... | 09/23/2003 |
| 6618678 | Method of joint analysis and interpretation of the subsurface from multiple seismic derived layer property data sets A method for classification of a subsurface includes the steps of: inputting at least two seismic drive layer property data sets; inputting data defining one or more zones of interest in the classification input data sets; inputting analysis data sets wit... | 09/09/2003 |
| 6615139 | Digitally implemented method for automatic optimization of gravity fields obtained from three-dimensional density interfaces using depth dependent density The present invention relates to a digitally implemented method for determining basement depths of 3-dimensional density interfaces from gridded gravity data, wherein density contrast above the interface is assumed to be varying parabolically with depth, ... | 09/02/2003 |
| 6594585 | Method of frequency domain seismic attribute generation The instant invention teaches an improved frequency domain based method of generating attributes from 2D or 3D seismic data. The central idea of the instant invention is that if a curve characterized by constant coefficients is fitted to a short-window Fo... | 07/15/2003 |
| 6590831 | Method and apparatus for controlling and optimizing seismic data acquisition A system and method for coordinating the operation of multiple manned, remotely operated or autonomous marine vessels engaged in marine seismic data acquisition to direct cooperating vessels from one point to the next while minimizing deviations in the de... | 07/08/2003 |
| 6587055 | Simultaneous triggering of remote units In a remote data acquisition system a control unit transmits a radio signal simultaneously to a plurality of remote units. Each remote unit receives the radio signal at different times dependent on various system delay factors. A compensating delay is add... | 07/01/2003 |
| 6584409 | Seismic processing method to improve spatial resolution Temporal and/or spatial frequencies of spatially and digitally sampled 2-D or 3-D seismic data above the Nyquist frequency are preserved in full time migration of partial time migration (DMO) of 2-D and 3-D are preserved. Use is made of the fact that migr... | 06/24/2003 |
| 6577955 | Methods of tomographically inverting picked events on migrated seismic data A method of inverting events that have been picked from a depth-migrated seismic trace, wherein a collection of traces is determined by depth migration prior to addition, the traces reflecting vertically below, a given surface point, and processing is app... | 06/10/2003 |
| 6574563 | Method for processing time lapsed seismic data signals A non-rigid method of matching two (12, 14) or more sets of seismic data signals obtained from the same subsurface area involving the steps of decomposing (20) the sets of seismic data signals into sample sets, generating displacement vectors (26) indicat... | 06/03/2003 |
| 6574565 | System and method for enhanced hydrocarbon recovery A neural network based system, method, and process for the automated delineation of spatially dependent objects is disclosed. The method is applicable to objects such as hydrocarbon accumulations, aeromagnetic profiles, astronomical clusters, weather clus... | 06/03/2003 |
| 6573855 | Three-dimensional questing method, three-dimensional voxel data displaying method, and device therefor In a three-dimensional exploring method for finding location of a buried object by transmitting a wave signal (4) by means of e.g. an electromagnetic wave into the ground (1) and receiving the signal reflected from the object (2) in the course of movement... | 06/03/2003 |
| 6574564 | 3D prestack seismic data migration method A prestack migration method allowing imaging of an underground zone, for a given velocity model of arbitrary complexity. The method allows obtaining elementary migrated images associated with the values assumed by a parameter and the sum of the images obt... | 06/03/2003 |
| 6564150 | System and method for orienting seismic energy receivers to yield discriminated vertical shear waves A system for, and method of, orienting seismic energy sources and seismic energy receivers to substantially separate a compressional wave from a vertical shear wave. The method includes reflecting a seismic energy from a subsurface interface to produce a ... | 05/13/2003 |
| 6560540 | Method for mapping seismic attributes using neural networks A method for training a probabilistic neural network to map seismic attributes or similar quantities.... | 05/06/2003 |
| 6560539 | Method and device for determining a value representing the speed of a vehicle A method and device that determines a quantity describing a speed of a vehicle. In this method, for at least two wheels, the speeds of these wheels are ascertained, and the quantity describing the speed of the vehicle is ascertained at least as a function... | 05/06/2003 |
| 6560537 | Prospecting technique Disclosed herein is a technique of prospecting for deep massive sulphide ore bodies, comprising the steps of selecting a geologic region which is substantially acoustically transparent; directing seismic waves at the region and collecting reflected or dif... | 05/06/2003 |
| 6556921 | Determining vertical fractures in a stratum using scattered vertical and horizontal shear modes The present invention provides a system for, and method of determining vertical fractures in a stratum using scattered horizontal shear and vertical shear modes. The method may include segregating first order horizontal and vertical shear modes of a seism... | 04/29/2003 |
| 6553315 | Seismic imaging using omni-azimuth seismic energy sources and directional sensing A method and apparatus for surveying a three dimensional sub-surface geological structure having seismic scatterers includes establishing an acquisition system (19) having at least two substantially vertical arrays of sensors (20) disposed within the geol... | 04/22/2003 |
| 6549853 | Method for determining seafloor roughness using multibeam echosounder The present invention provides a method for determining sea floor roughness using multibeam echosounder, said method comprising providing backscatter, bathymetry and multibeam operational parameters; removing system gain from the backscatter data to obtai... | 04/15/2003 |
| 6542826 | BT sorting method and apparatus for large volumes of seismic data A method for sorting large volumes of seismic data portions into a defined order. The data portions are allocated to leaf files of a B-Tree structure and stored in a corresponding scratch memory space corresponding to the allocated leaf file. A full leaf ... | 04/01/2003 |
| 6539308 | Dual sensor signal processing method for on-bottom cable seismic A method for processing data from dual sensor receivers to produce a combined seismic trace. A first seismic trace is received from a geophone and second seismic trance from a hydrophone in a dual sensor receiver. This first and second seismic traces are ... | 03/25/2003 |
| 6529445 | Method of reducing effects of a rough sea surface on seismic data A method of correcting seismic data for the effects of a rough sea surface is disclosed. Corrections for the effect of a rough sea surface are made by determining the time-dependent height of the sea surface, either by direct measurement or by calculation... | 03/04/2003 |
| 6526354 | Sonic well logging for alteration detection A method for determining alteration of a region of an earth formation surrounding an earth borehole, comprising the steps of providing a logging device that is moveable through the borehole; transmitting sonic energy into the formation and receiving, at a... | 02/25/2003 |
| 6519568 | System and method for electronic data delivery The present invention comprises a data delivery system for delivering oilfield data from an acquisition site to a remote delivery site comprising a central data hub computer that processes a workflow order for controlling delivery of the oilfield data, a ... | 02/11/2003 |
| 6516274 | Method for imaging discontinuities in seismic data using dip-steering Structural and stratigraphic discontinuities are identified in a 3-D volume of seismic data samples in the presence of reflection dip, by first selecting a primary and at least one secondary direction in the volume of seismic data samples. Next, skeleton ... | 02/04/2003 |
| 6510390 | 3-D seismic trace extrapolation and interpolation A swath of marine seismic data is acquired using a plurality of receiver lines, at least two near sources and at least one far source. Lines of data corresponding to the far seismic source are augmented to produce additional lines of interpolated and/or e... | 01/21/2003 |
| 6507787 | Method for the suppression of multiple reflections from marine seismic data A method for the suppression of multiple reflections using a Kirchhoff algorithm Multiple reflections are simulated by means of a Kirchhoff-type summation applied to a pseudo zero-offset section. An adaptive filter is applied to adjust the simulated multi... | 01/14/2003 |
| 6502038 | Method for non-hyperbolic moveout analysis of seismic data A method for moveout-correcting CDP gathers of seismic data that takes nonhyperbolic moveout at large offsets into account. The entire range of offsets is divided into smaller ranges. Within each smaller range, a curve is fitted to the reflection time vs.... | 12/31/2002 |
| 6501703 | Static correction method for exploration seismic data using first arrivals of seismic waves A shorter spatial wavelength static correction method for exploration seismic data using first arrivals according to the invention includes the steps of: based on a quadratic curve fitting to the first arrivals, which are picked up from seismic wave recor... | 12/31/2002 |
| 6502037 | Method for gravity and magnetic data inversion using vector and tensor data with seismic imaging and geopressure prediction for oil, gas and mineral exploration and production A method for modeling geological structures includes obtaining seismic data and using these data to derive an initial density model. Potential fields data is used to update the initial geophysical model by an inversion process using vector or tensor compo... | 12/31/2002 |
| 6498989 | Method for predicting dynamic parameters of fluids in a subterranean reservoir A method for determining the location of the accumulation fluids in a subterranean formation. The method includes the steps of determining a first velocity vector "Vx " for migration of fluid in a region of interest in the subterranean formatio... | 12/24/2002 |
| 6498990 | System and method for orienting seismic energy sources and receivers to yield discriminated horizontal and vertical shear waves A system for, and method of, orienting seismic energy sources and seismic energy receivers to yield discriminated horizontal and vertical shear modes. In one embodiment, the system includes: (1) an initial matrix representing wave energy produced by a sel... | 12/24/2002 |
| 6493635 | Remote access and automated dialog building for seismic processing Geophysical data processing is remotely controlled and monitored over a wide-area network such as the Internet. A customer using a client computer builds geophysical data processing flows (concatenations of geophysical data processing modules or filters) ... | 12/10/2002 |
| 6493634 | Method for determining stacking velocity parameters or other reflection geometry information from seismic gather data using multiple attributes and 3-D visualization A method for constructing velocity models for stacking seismic data, or, more generally, a method for determining reflection geometries with seismic gathers through the use of trace-to-trace coherency coupled with global editing capability to separate vel... | 12/10/2002 |
| 6490528 | Method for imaging discontinuites in seismic data Structural and stratigraphic discontinuities are identified in a 3-D volume of seismic data samples, by first selecting a plurality of directions containing a primary direction and at least one secondary direction. Next, one-dimensional, two-trace first d... | 12/03/2002 |
| 6487502 | System for estimating the locations of shaley subsurface formations The invention in a first embodiment comprises a method of utilizing seismic data attributes for interpreting seismic data from a region of the earth's subsurface, in which values are calculated for a plurality of seismic data attributes of said seismic da... | 11/26/2002 |
