Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7272520 | Method and apparatus for determining a current in a conductor The present invention provides a method of determining a current in a conductor. The method comprises the steps of determining the nth spatial derivative of at least one vector component of the magnetic field associated with the current at at least one po... | 09/18/2007 |
| 7257492 | Handling of static corrections in multiple prediction A method is for use in seismic data processing includes improving the continuity of the primary events in an original seismic dataset to create a continuous, seismic dataset; predicting at least the first order multiples of the original seismic dataset from the cont... | 08/14/2007 |
| 7194317 | Fast plant test for model-based control A method and apparatus for designing perturbation signals to excite a number of input variables of a system, in order to test that system for the purpose of obtaining models for the synthesis of a model-based controller. The method begins with providing input parame... | 03/20/2007 |
| 7095359 | Method of observing sea ice An ice thickness/drifting velocity observation of sea ice by using an ice thickness measurement sonar and a current meter moored into the sea and a sea ice observation by a high-resolution airborne SAR are synchronously performed, a correlation between a draft profi... | 08/22/2006 |
| 7033090 | Lenticular-printing calibration targets Calibration targets are generated for lenticular printing. A method involves generating a square wave at a frequency determined by a target pitch for the lenticules. Then filtering the square wave to eliminate aliased harmonics having regard to a Nyquist frequency d... | 04/25/2006 |
| 6996471 | Adding a signal to seismic data The present invention provides a method and apparatus for analyzing seismic data. The method includes determining a portion of the seismic data recorded substantially before the arrival of a seismic signal and adding a test signal to the portion of the seismic data ... | 02/07/2006 |
| 6996028 | Velocity analysis on seismic data A number of seismic stacks are precomputed (20) for known velocity fields. The velocity fields are chosen to span the range of velocities of interest. The stacks are then arranged (21) in the 3D memory of a graphics computer (10–14) using time... | 02/07/2006 |
| 6961673 | Measuring discontinuity in seismic data Various methods for measuring continuity and discontinuity of a seismic data set. One method embodiment includes: a) detecting seismic energy with an array of detectors; b) converting detection signals from the array of detectors into data representing one or more a... | 11/01/2005 |
| 6920084 | Offset transformation to zero dip that preserves angle of incidence A method and apparatus for compensating acquired seismic data for the presence of dipping events are disclosed. The method includes migrating the acquired, unstacked seismic data; and spatially mapping the migrated seismic data to correct their respective offsets wh... | 07/19/2005 |
| 6868038 | Seismic method of performing the time picking step The present invention provides a method of performing the time picking step in a VSP (vertical seismic profile) survey. In a preferred embodiment of the invention the time picking step is carried out on a combined three-component amplitude of the received seismic en... | 03/15/2005 |
| 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 |
| 6836448 | System and method for seismic wavefield separation A system and method of creating a filter for use with locally dense seismic data is disclosed. The method includes obtaining survey geometry characteristics from a locally dense seismic survey. A filter is designed which uses spatial derivatives of the wavefield of ... | 12/28/2004 |
| 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 |
| 6345108 | Multivariable statistical method for characterizing images that have been formed of a complex environment such as the subsoil The invention is a statistical method for analyzing exploration data associated with image elements showing physical properties of a complex environment such as subsoil for identifying the spatial relations between image elements. The method comprises suc... | 02/05/2002 |
| 6317384 | Method for geophysical processing and interpretation using seismic trace difference for analysis and display A method for identifying faults and stratigraphic features within seismic data without interpreter bias by processing seismic data to identify the minimum difference between seismic traces. Large values of difference are plotted as display attributes for ... | 11/13/2001 |
| 6195028 | Amplifier gain control method using conditional updating In a peak detection system having a variable gain amplifier (VGA), a counter is initialized and a countdown is triggered. Each time a qualified peak is detected, the counter is re-initialized. If the countdown is completed, the VGA gain is updated. This m... | 02/27/2001 |
| 6091668 | Static marine seismic system and method A system and method for periodically providing information about subsurface formations in a marine environment using a non-towed seismic signal source (3) and a static array of seismic signal receivers (4) is disclosed. The seismic signal source (3) compr... | 07/18/2000 |
| 6081482 | Semi-recursive imaging under complex velocity structures A computationally efficient semi-recursive Kirchhoff migration algorithm is capable of obtaining accurate images of complex structures in complex geological environments which commonly give rise to multivalued arrivals. The method alternates wave-equation... | 06/27/2000 |
| 6075752 | Method for exploring an environment with a complex tectonics The method consists in building a common midpoint gather of seismic traces of which the CMP point is said given point, subjecting the traces of this gather to dynamic and/or static corrections, and characterized in that the gather associated with the give... | 06/13/2000 |
| 6052333 | Method for seismic antenna illumination of subterranean feature for display and evaluation Monofrequency continuous wave signals of long duration are used as inputs form sources of known characteristics and location. These signals are reflected off subterranean features and serve to paint the features for display and evaluation. A primary featu... | 04/18/2000 |
| 6028820 | Method for determining the presence of fluids in a subterranean formation A method for seismic data interpretation for the purposes of identification of oil, gas and water accumulation locations and delineation of their contours uses a model of discrete media with inhomogeneous stresses. For a selected reflection horizon, the r... | 02/22/2000 |
| 6009043 | Cross-well connectivity mapping including separation of compressional and shear wave energy A method of determining the continuity of earth formations between wellbores by analyzing seismic energy imparted to the formations. The energy is imparted to the formations at a plurality of depths in one wellbore and is received at a plurality of depths... | 12/28/1999 |
| 5999489 | High vertical resolution crosswell seismic imaging A method for producing high vertical resolution seismic images from crosswell data is disclosed. In accordance with one aspect of the disclosure, a set of vertically spaced, generally horizontally extending continuous layers and associated nodes are defin... | 12/07/1999 |
| 5991237 | Method for the determination of migration velocities in seismic processing A method for the determination of migration velocities in seismic processing in which a blasting point S is associated with receivers (R1 to Rn) which are separated by offsets such that in a given speed range, a first set of traces d... | 11/23/1999 |
| 5986974 | Method for geophysical processing and interpretation using seismic trace difference for analysis and display A method for identifying faults and stratigraphic features within seismic data without interpreter bias by processing seismic data to identify the minimum difference between seismic traces. Large values of difference are plotted as display attributes for ... | 11/16/1999 |
| 5903515 | Spatial de-aliasing of the 3-D Kirchhoff DMO operator A method for generating an unaliased 3-D DMO operator using two dimensional sampling theory to the spatial traverse of the operator as well as to the temporal axis. First a continuous DMO operator is generated along the line segment connecting a source an... | 05/11/1999 |
| 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 |
| 5831935 | Method for geophysical processing and interpretation using seismic trace difference for analysis and display A method for identifying faults and stratigraphic features within seismic data without interpreter bias by processing seismic data to identify the minimum difference between seismic traces. Large values of difference are plotted as display attributes for ... | 11/03/1998 |
| 5740125 | Cross-well connectivity mapping including separation of compressional and shear wave energy A method of determining the continuity of earth formations between wellbores by analyzing seismic energy imparted to the formations. The energy is imparted to the formations at a plurality of depths in one wellbore and is received at a plurality of depths... | 04/14/1998 |
| 5677892 | Unaliased spatial trace interpolation in the f-k domain A computer-aided method for providing a de-aliased output data set dL (t,xL,yL) from a spatially aliased, three-dimensional, input data set of known seismic signals, a(t,x,y), where L is an interpolator. The known data set... | 10/14/1997 |
| 5661697 | Method and apparatus for detection of sand formations in amplitude-versus-offset seismic surveys A method and apparatus for analyzing amplitude-versus-offset (AVO) seismic data to distinguish sand formations, such as Morrow sands, from limestones and other similar intervals, is disclosed. For each of the traces in the survey, AVO intercept and AVO sl... | 08/26/1997 |
| 5648937 | Method and apparatus for correlating geological structure horizons from velocity data to well observations A method and apparatus for adjusting the results of a seismic survey according to well log data obtained from wells within the survey region is disclosed. The disclosed method operates on one seismic horizon at a time, and first applies well log data, arr... | 07/15/1997 |
| 5617372 | Unaliased spatial trace interpolation in the f-k domain Sparsely spatially-sampled seismic time-scale trace gathers may be aliased for certain spatial and temporal frequencies. Aliasing may be avoided by application of a spatial interpolation scheme that uses the phase difference between the f-k phase spectra ... | 04/01/1997 |
| 5586082 | Method for identifying subsurface fluid migration and drainage pathways in and among oil and gas reservoirs using 3-D and 4-D seismic imaging The invention utilizes 3-D and 4-D seismic surveys as a means of deriving information useful in petroleum exploration and reservoir management. The methods use both single seismic surveys (3-D) and multiple seismic surveys separated in time (4-D) of a reg... | 12/17/1996 |
| 5475589 | System for evaluating seismic sequence lithology and property, and for evaluating risk associated with predicting potential hydrocarbon reservoir, seal, trap or source A method for translating seismic time data via seismic depth data to seismic depth/lithology data, enabling reduced-risk location of hydrocarbons. Reducing dry hole risk is accomplished by introducing a new work domain which provides a several-fold increa... | 12/12/1995 |
| 5463594 | High frequency retention seismic survey method Methods for generating seismic data and creating a seismic section are disclosed in which the difference in offsets between stacked traces is limited.... | 10/31/1995 |
| 5214614 | Seismic directional sensor for solid-borne sound A seismic directional sensor for solid-borne sound has at least one geophone with pronounced directional characteristic. The measuring electrical vibration signals, which are obtained at different circumferential angular positions of the radial longitudin... | 05/25/1993 |
| 5206837 | Method for compensating for the effect of irregular spatial sampling of seismic wavefields This invention provides a method for compensating for the deleterious effects of irregular spatial sampling of seismic data. The imbalance caused by sparse sampling is corrected by decomposing a processed data gather into its constituent dip and azimuth c... | 04/27/1993 |
| 5193077 | Method and apparatus for improved seismic prospecting An improved method and apparatus for conducting seismic prospecting is provided wherein more accurate estimates of the source wavelet can be achieved. Receivers (202) detect pulses at vertically offset locations. The pulses are converted to digital signal... | 03/09/1993 |
| 5182729 | Reduction of sideswipe noise from seismic data by null steering Disclosed is a seismic surveying and data processing method to filter from seismic data any energy contributions that are not in the seismic line of profile. The surveying method requires a receiver geometry wherein at least one receiver is in and at leas... | 01/26/1993 |
