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| Number | Title | Issue Date |
| 5515271 | Apparatus and method for mapping lateral variation of subsurface impedance A technique for mapping lateral impedance of a subsurface layer is disclosed. Amplitudes are selected along a lateral slice of seismic data and an impedance model that generates values which approximate the selected amplitudes is developed. The lateral im... | 05/07/1996 |
| 5414674 | Resonant energy analysis method and apparatus for seismic data The invention is a method and apparatus for conducting seismic analysis of underground formations that offers improved accuracy in locating strata that contain natural gas in paying quantities. The method analyzes the resonant response generated when a se... | 05/09/1995 |
| 5383114 | Method for displaying a volume of seismic data A method for displaying seismic attributes in an open three-dimensional format is provided. The conventional two-dimensional variable-amplitude traces that represent the magnitude of a selected seismic attribute as a function of time are converted to thre... | 01/17/1995 |
| 5377104 | Passive seismic imaging for real time management and verification of hydraulic fracturing and of geologic containment of hazardous wastes injected into hydraulic fractures Using geologic hydraulic fracturing methods and subterranean waste injection and disposal processes well known in the petroleum production industry, hazardous wastes are pulverized, mixed to create a slurry, and injected into a subsurface hydraulic fractu... | 12/27/1994 |
| 5307268 | Method for using P-S converted waves as a subsalt imaging tool A hybrid velocity model is used to image the subsalt reflector. A method for imaging subsalt reflectors includes receiving seismic data and depth migrating the raw data. Generated seismic P-waves are assigned a first P-wave velocity for travel outside a s... | 04/26/1994 |
| 5239467 | Method for enhancing geophysical data by nonlinear compression of the dynamic range The present invention provides an improved method of processing and displaying geophysical data so as to enhance the evaluation and interpretation of subtle variations in the earth's geological and lithological structures. In particular, the dynamic range... | 08/24/1993 |
| 5229938 | Method for migrating seismic data by using ray tracing in determining two way travel times A method for obtaining two way travel times for source and receiver pairs includes the steps of determining a set of one way travel times for each source to a plurality of image points and a set of one way travel times for each receiver to the plurality o... | 07/20/1993 |
| 5229940 | Method of extracting three dimensional information from a grid of two dimensional seismic data A method for generating a three dimensional velocity model from a grid of two dimensional lines is presented. Each of the two dimensional lines is common offset depth migrated and the migrated common offset sections are sorted into common image point (CIP... | 07/20/1993 |
| 5148494 | Process for automatic plotting and assistance interpretation of seismic cross-sections in particular using image analysis techniques The process for analyzing a two-dimensional seismic cross-section image, including traces of a seismic cross-section, including processing the two-dimensional seismic cross-section with a binary function, a first value being assigned if a slope of the amp... | 09/15/1992 |
| 5079703 | 3-dimensional migration of irregular grids of 2-dimensional seismic data A method and apparatus for deriving a three-dimensional seismic image from an irregular grid of two-dimensional seismic data is provided. The two-dimensional seismic data incldue a plurality of shot lines. For each of the shot lines, a two-dimensional mig... | 01/07/1992 |
| 5056066 | Method for attribute tracking in seismic data A method for tracking seismic events such as boundaries of formation layers of earth formations is disclosed. Especially adapted for tracking such events in a two-dimensional slice of 3-D seismic volume data, the method begins by designating a starting da... | 10/08/1991 |
| 5008861 | Geophysical exploration by automatically picking and associating stacked seismic sections with regional coherency peaks of velocity spectra Regional velocity spectra coherency peaks are associated with peak events on a stacked seismic section of CMP gathers and used for editing siesmic data. In addition, travel time and spatial location along a seismic line data are displayed for stratigraphi... | 04/16/1991 |
| 4991095 | Process for three-dimensional mathematical modeling of underground geologic volumes A process using a stored program processor for modeling a geologic volume which has inclined, stacked layers of sedimentary deposits. The process employs a model volume with layers of cells which are inclined and stacked analogous to the layers of sedimen... | 02/05/1991 |
| 4984220 | Geophysical exploration using velocity spectra regional coherency peaks Regional coherency maxima are displayed in various domains and interactively edited to produce stacking velocity functions, horizon velocity functions, and sets of edited velocity spectra regional coherency peaks for use in geophysical exploration for oil... | 01/08/1991 |
| 4945519 | Method of geophysical exploration A geophysical method of exploration including processing and displaying seismic data so as to enhance geophysicists' ability to evaluate and interpret subtle variations in the earth's geological and lithological structure. In particular, an exponentiated ... | 07/31/1990 |
| 4935748 | Blast recorder and method of displaying blast energy A blast recorder and method for monitoring and processing vibrations from blasts, and for displaying the results in a nearly real time basis and in a manner which is easily interpreted by a relatively unskilled field worker and corresponds to a form which... | 06/19/1990 |
| 4926394 | Monte Carlo method for estimating lithology from seismic data A Monte Carlo statistical method for combining discrete geological measurements of rock properties with continuous measurements of seismic attributes and for converting those combined measurements into a display of the best estimate of subsurface rock cla... | 05/15/1990 |
| 4876673 | Display of common depth point seismic data with velocity correction in real time An improved method and apparatus for processing seismic data records is disclosed. Data is normal moveout corrected by an operator providing estimates of velocity of seismic energy in rock layers in the earth. According to the invention, the system provid... | 10/24/1989 |
| 4821164 | Process for three-dimensional mathematical modeling of underground geologic volumes A process for modeling a bounded volume having a given geologic stratigraphic pattern, other than a volume having layers of uniform thickness parallel to mean sea level. The process comprises the steps of constructing a separate grid for each critical sur... | 04/11/1989 |
| 4813027 | Method and apparatus for enhancing seismic data A method and apparatus for stacking a plurality of seismic midpoint gathers to provide an enhanced pictorial representation of seismic events is disclosed. The approximate propagation velocity corresponding to a selected event in a common midpoint gather,... | 03/14/1989 |
| 4811220 | Method for visual display and analysis of subsurface rock properties and structure utilizing colored magnetotelluric transfer functions A three-dimensional display and interpretation technique, in which magnetotelluric survey and modeling data are transformed and compared in order to yield a remotely determined picture of subsurface rock properties and structure, is disclosed. Normalized ... | 03/07/1989 |
| 4800539 | Method and apparatus for seismic dip filtering A computer-implemented technique for dip filtering of seismic data whereby seismic data of a selected attribute in space and time coordinates is displayed in accordance with a 3-D illumination model such that the apparent angle of illumination of the data... | 01/24/1989 |
| 4749990 | Image display system and method The present invention generally provides an image display system having display means, image memory means for storing image data in the form of rows and columns of pixels with each pixel having a value representing the intensity level thereof, processor m... | 06/07/1988 |
| 4736299 | Reflection seismograph method and apparatus A reflection seismograph collects data received over a plurality of channels in a field location and provides data recorded on a recording medium for processing at a home data processing site in accordance with well-known algorithms. Data is collected ove... | 04/05/1988 |
| 4727488 | Method and apparatus for detecting seismic events by identifying crossings in the Nth derivative of a waveform An electronic system automatically detects significant events in a seismic trace. The seismic trace is defined as a series of consecutive points, equally spaced in time. The system provides for taking the Nth derivative of the trace at each of the points.... | 02/23/1988 |
| 4707787 | Beam-activated complex-solid formation utilizing pattern-independent, coordinate-sequence construction A system and method for forming a model of an underground geological formation is disclosed wherein a quantity of non-solid material of the type which solidifies at volumetric positions impinged upon by preselected incident energy as used. Memory means ar... | 11/17/1987 |
| 4694438 | Time-offset-frequency-amplitude panels for seismic identification of hydrocarbons A method for preparing a display of seismic data obtained from multiple-point coverage of a subterranean earth formation using an array of seismic sources and acoustic receivers. A set of seismic traces is obtained in such a manner that each trace is asso... | 09/15/1987 |
| 4672545 | Method and apparatus for synthesizing three dimensional seismic data Method and apparatus are disclosed for converting seismic data obtained at known points to synthesized seismic traces obtainable at arbitrarily selected points. Two dimensional seismic data are converted to three dimensional data with the aid of a program... | 06/09/1987 |
| 4661934 | Ground position controller and method for automatically indicating parameters that spatially cross-reference the locations of seismic spread and source arrays during exploration for hydrocarbons and the like The present invention relates to a ground position controller utilizing a microcomputer system interconnected to a digital field system (DFS) via a system bus, for generating, formatting and displaying information (for insuring integrity of field operatio... | 04/28/1987 |
| 4646239 | Method of seismic exploration including processing and displaying seismic data to quantitatively distinguish among seismic events A method for quantitatively distinguishing seismic events on a seismic record for inferring changes in the geological character of the subterranean formations. Reflection coefficients are obtained for such seismic events and a first set of attributes indi... | 02/24/1987 |
| 4633448 | Three-dimensional display of adjacent seismic sections A computergraphics system display seismograms in a three-dimensional presentation of the subsurface formations of a section of the earth from which the seismograms were obtained. Digital seismic sections are converted to video signals which are recorded o... | 12/30/1986 |
| 4633447 | Response waveform characterization of geophysical data A method of processing geophysical seismic data so as to enhance its evaluation and interpretation. A plurality of response waveform characteristics are developed from a seismic signal. The response waveform characteristics can provide empirical basis for... | 12/30/1986 |
| 4633402 | Method and apparatus for automatically producing representations of three-dimensional horizons from processed seismic data An electronic system automatically produces representations of three-dimensional recommended horizons from processed seismic data. Significant events, in the form of turnings, are identified in all of the digitized traces that make up the processed seismi... | 12/30/1986 |
| 4633399 | Method of seismic data enhancement using a phase of rectified trace seismic parameter A method for developing a novel seismic data attribute enables improvements in seismic data processing and interpretation. Seismic signals or trace data are first rectified and then Hilbert transformed and processed with the arc tangent function to develo... | 12/30/1986 |
| 4574358 | Monitor display control A cathode ray tube is used for quality control in conjunction with a method and apparatus for monitoring seismic data gathers. As seismic reflection data is acquired, it is displayed on a cathode ray tube and visually monitored to determine whether inform... | 03/04/1986 |
| 4534019 | Common-depth-point method for determining and displaying the shear-velocity reflectivities of a geologic formation A novel method for determining and displaying the shear-velocity reflectivities of geologic formations is disclosed wherein a compression-wave common-depth-point seismic-data-gathering technique is utilized to produce both normal incidence compressional-v... | 08/06/1985 |
| 4381544 | Process and apparatus for geotechnic exploration A process for geotechnic exploration comprising the steps of: (a) Emitting one or more brief electromagnetic pulses or waves from an airborne platform at regular intervals based on the airspeed of the platform and the area being surveyed; (b) The wavelengths, ... | 04/26/1983 |
| 4369507 | Conditional updating method and apparatus associated with a microcomputer system for automatically indicating and recording parameters that spatially define locations of seismic exploration spread and source arrays The present invention relates to a method and apparatus for conditionally updating source-detector array parameters related to a seismic exploration system, especially during generation and collection of seismic data using a vibratory source detector arra... | 01/18/1983 |
