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| Number | Title | Issue Date |
| 6865489 | Method for compensating mild lateral velocity variations in pre-stack time migration in the frequency-wave number domain A method for performing pre-stack time migration of seismic data in a region where the subsurface seismic wave propagation velocity varies in both the vertical direction and a horizontal direction. The migration is performed in the wave number—frequency domain and... | 03/08/2005 |
| 6850864 | Method for analyzing dip in seismic data volumes A method of analyzing dip in a seismic data volume in which a horizontal gradient is calculated in a first direction in the seismic data volume. A vertical gradient is calculated at data locations in the seismic data volume corresponding to the locations at which th... | 02/01/2005 |
| 6847921 | Method for analyzing spatially-varying noise in seismic data using Markov chains The invention is a method for analyzing spatially-varying noise in seismic data. Transitions between data values at adjacent data locations in a seismic data set are represented by Markov chains. Transition probability matrices are constructed from the Markov chains... | 01/25/2005 |
| 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 |
| 6801473 | Method for estimating and removing artifact noise from seismic data A seismic signal is represented as a combination of a geologic signal and a noise signal. The representation of the seismic signal is decomposed into a linear combination of orthonormal components. One or more components are identified in which the geologic signal a... | 10/05/2004 |
| 6791900 | Method of calculating a throw volume for quantitative fault analysis A method of calculating a throw volume corresponding to a seismic data volume. A range of time shifts and a search direction for the seismic data volume are selected. A data location separation and a vertical time window are also selected. A cross-correlation is cal... | 09/14/2004 |
| 6757615 | Method for automated horizon transfer and alignment through the application of time-shift volumes Seismic horizons are transferred between two three-dimensional seismic data volumes which cover the same area. The seismic data volumes are time-aligned to generate a time-shift volume. A seismic horizon is selected and the time-shift volume is applied to the seismi... | 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 |
| 6664788 | Nonlinear electroseismic exploration A method for seismic exploration using nonlinear conversions between electromagnetic and seismic energy, with particular attention to the electromagnetic source waveform used. According to the invention, seismic returns from a source waveform are correlat... | 12/16/2003 |
| 6662112 | Method for classifying AVO data using an interpreter-trained neural network AVO anomalies are classified in near-offset and far-offset seismic data volumes, by first calculating a plurality of initial AVO seismic attributes representative of the offset seismic data volumes. A probabilistic neural network is constructed from the c... | 12/09/2003 |
| 6661000 | Method for measuring absorbed and interstitial fluids A method for predicting hydrocarbon-bearing zones and estimating rock properties by analyzing fluids trapped in the pore spaces or adsorbed on the surfaces of rock samples. The trapped gases are removed under vacuum and analyzed by a mass spectrometer. Da... | 12/09/2003 |
| 6603313 | Remote reservoir resistivity mapping A method for surface estimation of reservoir properties, wherein location of and average earth resistivities above, below, and horizontally adjacent to the subsurface geologic formation are first determined using geological and geophysical data in the vic... | 08/05/2003 |
| 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 |
| 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 |
| 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 |
| 6477113 | Source waveforms for electroseismic exploration A method for seismic exploration using conversions between electromagnetic and seismic energy, with particular attention to the electromagnetic source waveform used. According to the invention, source waveforms are correlated with reference waveforms sele... | 11/05/2002 |
| 6343256 | Illumination corrections to reduce geometrical artifacts in seismic data A method for correcting seismic amplitudes for geometrical artifacts resulting in non-uniform illumination of reflector surfaces. The illumination is calculated for each offset as a function of spatial position. The amplitudes are scaled by a scale factor... | 01/29/2002 |
| 6278950 | Turning-wave amplitude inversion A method for compensating for amplitude loss in a set of seismic traces, where the amplitude loss is caused by shallow attenuation anomalies. Attenuation factors are calculated from first-arrival amplitudes for long-offset seismic data traces. Those facto... | 08/21/2001 |
| 6253157 | Method for efficient manual inversion of seismic velocity information A method for calculating seismic velocity for migration purposes as a function of subsurface spatial position that gives the seismic processing analyst direct control of the resulting migration velocity model, and includes a means to ensure that the model... | 06/26/2001 |
| 6094620 | Method for identifying and removing multiples from seismic reflection data A velocity independent method of predicting surface-related multiples in any gather of seismic data traces. In one embodiment, the method comprises the steps of regularizing said gather of seismic data traces; performing a double Fourier transformation to... | 07/25/2000 |
