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| Number | Title | Issue Date |
| 7333392 | Method for estimating and reconstructing seismic reflection signals A method for reconstructing seismic data signals of poor quality to improve the signal-to-noise ratio of the data for display and analysis in connection with the selection of drilling sites for recovery of hydrocarbons. The method includes providing a signal model b... | 02/19/2008 |
| 7203600 | Geophysical data processing A mehtod of determinig an integral of a function over an n-dimensional intergratio domain from the values of the function at a plurality of discrete data points within the integration domain, comprises partitioning the integration domain into a plurality of k-dimens... | 04/10/2007 |
| 7151793 | Method for synchronizing a receiver, a positioning system, a receiver and an electronic device A method for performing synchronization operations of a receiver to a received code-modulated spread spectrum signal whereby at least one reference code (r(x))is used. This reference code corresponds to a code used in the modulation. The frequency shift of the recei... | 12/19/2006 |
| 7003402 | Method of processing data A method of processing data sequences obtained at substantially the same time at locations spatially separated from one another is disclosed. A sequence indicative of a measure of spread of the data sequences or of selected data sequences is determined. A common sig... | 02/21/2006 |
| 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 |
| 6049507 | Method and apparatus for correcting effects of ship motion in marine seismology measurements An apparatus and method for removing the distortion in marine seismic data resulting from the motion of the ship. The ship trails one or more seismic sources and receivers and moves forward at a known velocity. The seismic sources emit seismic waves that ... | 04/11/2000 |
| 6028822 | Configuration of source and receiver lines for 3-dimensional seismic acquisition A method for performing a seismic survey with even fold. An inline direction and a crossline direction are selected. Seismic signals are generated at a plurality of source locations positioned along one or more source lines. The source locations are subst... | 02/22/2000 |
| 5991238 | Weighted backus filter method of combining dual sensor traces A method for attenuating water column reverberations in a dual sensor seismic signal, whereby a pressure signal and a velocity signal are transformed from the time domain to the frequency domain, generating a transformed pressure signal and a transformed ... | 11/23/1999 |
| 5892732 | Method and apparatus for seismic signal processing and exploration A method and apparatus for the exploration of hydrocarbons comprising the steps of: obtaining a set of seismic signal traces distributed over a predetermined three-dimensional volume of the earth; dividing the three-dimensional volume into a plurality of ... | 04/06/1999 |
| 5774690 | Method for optimization of element placement in a thinned array A method for generating a thinned array having an optimal directional response wherein an initial population of possible element occupancy patterns is generated and a relative fitness value for each of the element occupancy patterns in the initial populat... | 06/30/1998 |
| 5712805 | Noise diagnostic system A method for reconstructing the acoustic field on the surface of a vibrating object based on measurements of the radiated acoustic pressure includes solving the Helmholtz equation directly using the expansion of a set of independent functions that are gen... | 01/27/1998 |
| 5136554 | Method of geophysical exploration A method of geophysical exploration for acquiring and processing multicomponent seismic data obtained with seismic sources generating shear waves having time-varying polarizations and seismic receivers recording at least two modes of propagation of the im... | 08/04/1992 |
| 4964086 | Method for characterizing velocity estimates The present invention provides a novel method for obtaining quality indices for objectively characterizing seismic velocity estimates in geophysical data bases.... | 10/16/1990 |
| 4964098 | Method for seismic trace interpolation A method for seismic trace interpolation by dip range analysis is disclosed. In the preferred embodiment, a series of dip ranges are defined by a plurality of dips. A trace estimate for each of the dip ranges is generated by filtering with a mathematicall... | 10/16/1990 |
| 4937794 | Seismic noise suppression method Coherent noise on seismic records is suppressed by reformatting the common shot gathers to common receiver gathers. Pairs of seismic traces from a common receiver gather are corrected for differential normal moveout, weighted in inverse relation to the RM... | 06/26/1990 |
| 4905204 | Method of weighting a trace stack from a plurality of input traces A method is disclosed for developing a weight function for a trace stack from the weight functions derived from the respective weight functions of an ensemble of individual separate input traces. Also disclosed is the method of developing the resulting we... | 02/27/1990 |
| 4882713 | Method for noise suppression in the stacking of seismic traces A method is disclosed to provide optimal or near-optimal vertical stacking of seismic records within the constraints imposed by real time data acquisition procedures. This method is characterized by forming output seismic traces which are a sum of prorate... | 11/21/1989 |
| 4744064 | Method and apparatus for seismic exploration Method and apparatus for digitally deriving arrays from seismic data. Indentical parallel processing elements connected between common input/output buses are each preselected to derive different pluralities of arrays. Array specifications defining the arr... | 05/10/1988 |
| 4644795 | High resolution multiline ultrasonic beamformer The present invention is a multiline beamformer for use in a medical ultrasound scanner using a phased array transducer. Lines of ultrasound energy are generated having a pressure at the array aperture corresponding to sin (πx)/πx, where x is the normal... | 02/24/1987 |
| 4570246 | Method for the interpretation of statistically-related seismic records to yield valuable characteristics, such as gas-bearing potential and lithology of strata In accordance with the present invention, progressive changes in amplitude as a function of offset of common gathers can be more easily identified by emphasizing the degree of amplitude variation between traces of each gather along a seismic line, and aft... | 02/11/1986 |
| 4561074 | Computationally efficient weighting and vertical stacking methods and apparatus for improving signal-to-noise ratio of seismic data This disclosure relates to improved methods and apparatus for vertically stacking seismic-trace data collected by a digital field recorder during seismic prospecting utilizing plural initiations of a low energy surface seismic source. Seismic-trace data g... | 12/24/1985 |
| 4561075 | Method and apparatus for selecting inverse power weighting prior to vertically stacking acquired seismic data for suppressing noise A method and apparatus are disclosed for signal-to-noise optimization of seismic-trace signals during seismic prospecting utilizing plural initiations of a low energy surface seismic source. The method and apparatus optimize signal-to-noise ratio by verti... | 12/24/1985 |
| 4320471 | Seismic surveying method A method is provided for obtaining wide band seismograms made from a plurality of narrow band seismic surveys using vibrator type sources. Several different narrow frequency band seismograms are obtained using vibrator type signal sources. The narrow band... | 03/16/1982 |
| 4276620 | Method and apparatus for obtaining a composite field response _to a variable source array using weighting coefficients A multi-channeled digital seismic field stacking system is disclosed for obtaining the composite response to a variable source array. A variable source array is synthesized by applying preselected weighting coefficients to the seismic signals produced in ... | 06/30/1981 |
| 4259733 | Multi-dimensional seismic imaging Seismic traces synthesizing the response of subsurface formations to a cylindrical or plane wave are obtained for a succession of shotpoint locations along a seismic line of profile. The traces obtained are then wavefront steered and the steered traces an... | 03/31/1981 |
| 4254480 | Frequency independent directionally sensitive array in seismic surveying A novel array of vertically and horizontally spaced hydrophones is shown which is capable of high ratio of desired signal to noise because of good directional sensitivity when used with any seismic source. Alternatively, a novel directionally sensitive ar... | 03/03/1981 |
| 4160233 | Seismic array An improved seismic array is disclosed having a plurality of seismic detector connection points with a seismic detector at each seismic detector connection point. The output of each seismic detector in the array is weighted by providing first resistive we... | 07/03/1979 |
| 4151504 | Bidirectional seismic array and method of seismic exploration An improved seismic array and method of seismic exploration are provided which have the capability to supply data to separate recording stations simultaneously. The seismic array has a plurality of seismic detector connection points, and a seismic detecto... | 04/24/1979 |
| 4024492 | Seismic array An improved seismic array is provided which has the capability to supply data to adjacent recording stations simultaneously. The seismic array has a plurality of seismic detector connection points, and a seismic detector is located at each seismic detecto... | 05/17/1977 |
