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| Number | Title | Issue Date |
| 7672195 | Diagonal gather trace interpolation Diagonal gather trace interpolation systems and methods are disclosed. In some embodiments, the method includes obtaining seismic traces from a marine seismic survey performed using typically two seismic sources fired in a flip-flop pattern. The seismic traces are p... | 03/02/2010 |
| 7379386 | Workflow for processing streamer seismic data A method includes conditioning a set of multicomponent seismic data and sensor orientation data, the multicomponent seismic data including pressure data and particle motion data, acquired in a towed array, marine seismic survey; digital group forming the conditioned... | 05/27/2008 |
| 7366054 | Tau-P filters for removal of noise from seismic data Methods of processing seismic data to remove unwanted noise from meaningful reflection signals are provided for. The methods comprise the steps of assembling seismic data into common geometry gathers in an offset-time domain without correcting the data for normal mo... | 04/29/2008 |
| 7224642 | Wireless sensor data processing systems A wireless network includes a plurality of sensors; and a wireless station adapted to communicate with the plurality of sensors, each wireless station having a positioning system to provide 3D coordinates, each wireless station being part of a mesh network and each ... | 05/29/2007 |
| 7177232 | Wireless radio frequency hydrophone system A wireless hydrophone system includes a hydrophone joined to a preamplifier. A serial A/D converter receives the amplified hydrophone signal and provides a serial digital output representative of the signal. The A/D converter is joined to a processor which provides ... | 02/13/2007 |
| 7136016 | Platform position location and control A method and apparatus for determining and tracking the geodetic position of a mobile platform (i.e., aircraft). The apparatus comprises a ground controller assigned to a geographic space (i.e., an airspace) and at least one mobile platform (i.e., aircraft) communic... | 11/14/2006 |
| 7039525 | Method for seismic migration using explicit depth extrapolation operators with dynamically variable operator length Explicit depth extrapolation operators are constructed with variable operator lengths depending on maximum dip angle, accuracy condition, and wavenumber. Operator tables are then constructed using the explicit depth extrapolation operators. In a further embodiment, ... | 05/02/2006 |
| 7012853 | Seismic data acquisition apparatus and method The present invention provides a method and apparatus of acquiring and processing seismic data. One or more controllers are each coupled to seismic sensors and to each other to form a network of data acquisition units. A main controller is coupled to a crossline uni... | 03/14/2006 |
| 6999377 | Acquiring seismic data Methods and systems are provided for acquiring seismic data. Data are collected representing acoustic signals received from the Earth at distinct geographic locations. Data representing an ambient signal at the distinct geographic locations are also collected. For e... | 02/14/2006 |
| 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 |
| 6891733 | Seismic data acquisition module A seismic data acquisition module includes a motherboard that is environmentally protected as a independent unit by an integral sheath, envelope or encapsulating cover. The motherboard unit is suitably configured for rapid and frequent manual removal from the interi... | 05/10/2005 |
| 6819628 | Wave migration by a krylov space expansion of the square root exponent operator, for use in seismic imaging Seismic imaging apparatus for receiving data propagated through sub-surface structure from a seismic source to at least one seismic receiver and forming an image therefrom, the apparatus comprising: an imager for forming an initial image from said data including ini... | 11/16/2004 |
| 6681199 | Peak time detecting apparatus and method A product-sum operation portion for performing a product-sum operation (wavelet transformation) with respect to an input time-series signal by using as a base of integral a complex function in which the imaginary number portion is π/2 shifted in phase fr... | 01/20/2004 |
| 6674689 | Method for morphologic analysis of seismic objects A method for analyzing and classifying the morphology of seismic objects extracted from a 3D seismic data volume. Any technique may be used to extract the seismic objects from the 3D seismic data volume. According to the inventive method, one or more morp... | 01/06/2004 |
| 6032104 | Method of processing seismic signals so as to reduce the effects of dip in the analysis of moveouts A method of processing seismic signals for the analysis of moveout is presented in which waves are transmitted in a medium, reflected, received by receivers and recorded in the form of seismic traces. A string of N integers is defined having indices j lyi... | 02/29/2000 |
| 6028823 | Geodetic position estimation for underwater acoustic sensors A system and survey method for estimating the geodetic position of acoustic sensors placed at fixed but unknown locations on the seafloor is disclosed. Bottom mounted sensors are surveyed using an extension of the well known trilateration survey technique... | 02/22/2000 |
| 6028821 | Process for separating waves in borehole seismics for walkway-type acquisitions A process for separating waves in borehole seismics for walkaway-type acquisitions. Waves are generated in a medium from several positions of a source. The waves are received at at least three sensors along axes V, H1, H2. Collection... | 02/22/2000 |
| 6021094 | Method of migrating seismic records The present invention provides a method of migrating seismic records that retains the information in the seismic records and allows migration with significant reductions in computing cost. The present invention comprises phase encoding seismic records and... | 02/01/2000 |
| 5970023 | Reducing aliasing artifacts in seismic data processing using sharpened (TAU-P-Q) transforms Marine seismic data sets are generally under-sampled spatially because of the relatively long listening times required in deep water. It is customary to use very long spreads in the field thereby enhancing aliasing and interference from coherent noise. A ... | 10/19/1999 |
| 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 |
| 5587967 | Method for improvement of seismic sections A method for improving seismic sections includes generating seismic signals at source stations, recording seismic traces at receiver stations and gathering the seismic traces as a first gather at a common point as a function of the offsets between the sou... | 12/24/1996 |
| 5544126 | System and method of seismic shot-record migration A method of seismic shot-record migration includes the steps of generating seismic or acoustic waves into an earth formation from one or more sources with the sources being spaced some finite distance from each other. Next, one or more spaced receivers re... | 08/06/1996 |
| 5450371 | Statistical analysis of regional velocities A multi-dimensional assemblage of time/velocity functions are sampled for velocity as a function of incremental time. The samples are stored in a matrix arranged in columns along the time axis and rows across the velocity axis. The count of the number of ... | 09/12/1995 |
| 5235556 | Interpolation of aliased seismic traces The present invention provides method of interpolating spatially aliased seismic data. This method produces high resolution interpolated data based on a locally planar model of reflection events using a two dimensional power diversity slant stack process ... | 08/10/1993 |
| 5084844 | Efficient method for storing seismic traces on disk A method by which portions of a seismic data set are deleted since no meaningful data is contained in that portion contains the step where a line of data is examined, gather by gather, to determine the smallest useful arrival time for every offset. Data h... | 01/28/1992 |
| 5050129 | Marine seismic data conditioning An encoded seismic source, such as a marine vibrator, and a receiver, such as a seismic streamer, are pulled through water at constant velocity and depth. The source is periodically actuated and the reflected acoustic signals are converted by the receiver... | 09/17/1991 |
| 5014249 | Method in a real time control system for seismic interference A method in real time control systems for seismic interference to indicate an acceptable level of interference in relation to the amplitude, angle of incidence, and frequency of a seismic reflection signal, and to remove such interference loaded signals d... | 05/07/1991 |
| 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 |
| 4930076 | Systolic radon transform processor An array of Radon transform processors accepts signals representative of the x and y positions of each pixel of an image together with signals representative of the magnitude or brightness of the image. Each Radon transform processor of the array is assoc... | 05/29/1990 |
| 4907205 | Method for attenuating multiple reflection events in seismic data A method is described for enhancing seismic data and, more particularly, for attenuating multiple reflection events in seismic data. Seismic data are sorted into common endpoint gathers, and selected multiple reflection events are corrected for time delay... | 03/06/1990 |
| 4885711 | Data processing A method for removing noise from seismic wiggle traces is provided. Data points from the seismic traces are selected for which amplitude and derivative values are determined. The derivative values are crossplotted as a function of the amplitude values. A ... | 12/05/1989 |
| 4837752 | Method for establishing a common bandwidth for processing seismic data obtained from different sources, recording equipment and surveys A common bandwidth determination method for two disparate seismic datasets includes developing a weighted average of first least-squares filters assuming the data from the first dataset is the input and the data from the second dataset is the desired outp... | 06/06/1989 |
| 4779237 | Method of geophysical exploration including processing and displaying seismic data to obtain a measure of subterranean formation rock properties The present invention provides a method of seismic exploration for obtaining a measure of the subterranean formation rock properties. Incident angle ordered gathers of seismic signal are processed to obtain a measure of the reflection coefficient as well ... | 10/18/1988 |
| 4779238 | Method for fast slant stack of seismic data A method for processing seismic data in the x-t domain to derive a slant stack in the p-tau domain wherein partial slant stacks are computed over a plurality of small groups of traces which are iteratively merged using linear interpolation into successive... | 10/18/1988 |
| 4758998 | Methods for attenuation of horizontally traveling seismic waves Disclosed is an array of seismic energy receiver elements spaced specifically for attenuation of horizontally traveling seismic waves. In one embodiment, the rows of seismic energy receiver elements are spaced apart a crossline distance d and have a total... | 07/19/1988 |
| 4757480 | Method and apparatus for filtering seismic data A method and apparatus for filtering seismic data are provided. More particularly, the method and apparatus of the present invention attenuate surface wave generated noise in seismic-trace signals. Seismic data comprising multicomponent seismic-trace sign... | 07/12/1988 |
| 4745585 | Method of migrating seismic data Seismic data are passed through a preselected number of migration stages. During each stage, data are migrated a plurality of times, where the migration-velocity function is a minor fraction of the velocity required to fully migrate the data in a single s... | 05/17/1988 |
| 4740929 | Method for suppressing noise in seismic data A method for recursively, continuously estimating the noise and signal components of a seismic trace. More particularly, a method for suppressing the noise component in seismic data so as to enhance the resolution of seismic events contained therein. The ... | 04/26/1988 |
| 4725992 | Adaptive seismometer group recorder having enhanced operating capabilities In a seismic exploration system, an adaptive seismometer group recorder having enhanced operating capabilities for acquiring, processing, and storing seismic signals is provided. The adaptive seismometer group recorder includes a solid state memory, a mic... | 02/16/1988 |
| 4628492 | Method of avoiding aliasing in slant stacking of seismic data A method for avoiding aliasing in ͌-p transformation or "slant stacking" of seismic data is disclosed which features identification of frequency components of the data likely to be aliased during correlative summation steps and removal thereof from the d... | 12/09/1986 |
