Matches 51 - 100 out of 242 < 1 2 3 4 5 >
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6912468 Method and apparatus for contemporaneous utilization of a higher order probe in pre-stack and post-stack seismic domains  
A method for contemporaneously utilizing seismic data in the pre-stack seismic domain and the post-stack seismic domain is disclosed. The method includes initiating a higher order probe at a...
6912491 Method and apparatus for mapping uncertainty and generating a map or a cube based on conditional simulation of random variables  
A new method is presented for generating a probability map, a cutoff map, and a confidence limit map in one single operation. In addition, the new method can also generate a cube representing a...
6912466 Method for imaging seismic structures  
A process for displaying seismic data that compares the data to a model function, typically a trigonometric sine wave. Sample points from the model function are compared to sample points of the...
6906982 Marine time-lapse seismic surveying  
A method for making a time-lapse seismic survey in a marine environment, the method designed to eliminate multiple surface reflections and changes in sea state and conditions. Seismic sources and...
6868037 Use of drill bit energy for tomographic modeling of near surface layers  
A method for tomographic modeling of seismic wave travel times from well drilling records generated by drill string vibrations during drilling and identifying in the recorded vibration at least one...
6868039 Method for determining a seismic wave velocity model in a heterogeneous underground  
A method for determining a velocity model of seismic waves picked up by seismic receivers coupled with an underground formation, in response to the emission of seismic waves in the subsoil by a...
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....
6839658 Seismic processing with general non-hyperbolic travel-time corrections  
A method of constructing a basis of functions intended for the building of approximations of one-way or two-way seismic traveltime versus offset functions. The method is characterized by the...
6832160 Method for finding reflectivity of reflectors  
Method for solving the classical inversion problem of finding the angle dependent reflection coefficients along selected reflectors in the subsurface. The input data to the method include seismic...
6826486 Methods and apparatus for predicting pore and fracture pressures of a subsurface formation  
A method of predicting values of formation parameters (e.g., compressional velocity, density, pore pressure, and fracture pressure) as a function of depth includes generating an initial prediction...
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...
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....
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...
6788619 Concentrating seismic energy in a selected target point in an underground formation  
Providing a set of seismic sources in a focusing array to enable concentrating seismic energy in a selected target point (k) in an underground formation, by performing a standard seismic survey of...
6766254 Method for updating an earth model using measurements gathered during borehole construction  
A method and system for real time updating of an earth model. The efficiency with which an oil or gas well is constructed can be enhanced by updating the relevant earth model using real-time...
6763311 Shaking test apparatus and method for structures  
A calculating device and method provided for a shaking test apparatus for carrying out a shaking test on a structure by using a partial structure and a numerical model which is virtually connected...
6757614 Seismic signal processing method and apparatus for generating correlation spectral volumes to determine geologic features  
A seismic signal processing method will analyze a resultant set of seismic data, generated in response to a seismic operation performed on a particular portion of an Earth formation, for the...
6731568 Seismic prospecting method using converted wave processing  
A seismic prospection method in which a compression seismic wave is emitted into the subsoil and sensors are used to collect seismic data having at least a shear component, and in which the data...
6721694 Method and system for representing the depths of the floors of the oceans  
A method for generating a model of a portion of the floor of a body of water from a plurality of depth measurement sources includes determining an overlap of any of the plurality of depth...
6714867 Method for seismic monitoring of an underground zone by simultaneous use of sererval vibroseismic sources  
Method and system intended for seismic monitoring of an underground zone ( 1 ), comprising simultaneously using several seismic vibrators. The system comprises for example several local units (LU)...
6704658 Method for predicting seismic event using value of magnitude, position of seismic event, time of seismic event, using seismograph for measuring quake of earth  
A method of judging the degree of risk of a seismic event by obtaining a condition of activities in the earth's crust using seismic data disclosed in the Internet and the like. An analysis and...
6691075 Method for modeling seismic acquisition footprints  
A model seismic image of a subsurface seismic reflector is constructed, wherein a set of source and receiver pairs is located, and a subsurface velocity function is determined. Specular reflection...
6687659 Method and apparatus for absorbing boundary conditions in numerical finite-difference acoustic applications  
A hybrid approach is disclosed for implementing highly efficient absorbing boundary conditions in three dimensional (3D) finite difference (FD) acoustic applications such as post-stack and...
6662147 Method allowing to obtain an optimum model of a physical characteristic in a heterogeneous medium such as the subsoil  
A method for obtaining, by means of an inversion process, an optimum model of a physical characteristic in a heterogeneous medium (the impedance of an underground zone in relation to waves...
6618695 Method for gradually deforming a stochastic model of a heterogeneous medium such as an underground zone  
Method for gradually deforming, totally or locally, a Gaussian or similar type stochastic model of a heterogeneous medium such as an underground zone, constrained by a series of parameters relative...
6549854 Uncertainty constrained subsurface modeling  
A method, apparatus, and article of manufacture are provided that use measurement data to create a model of a subsurface area. The method includes creating an initial parameterized model having an...
6522973 Method for 2D or 3D modelling of a heterogeneous medium such as the subsoil described by one or more physical parameters  
A method of obtaining a representative 2D or 3D model of a heterogeneous medium described by multiple physical parameters (such as the impedances of the subsoil in relation to P or S type waves,...
6438069 Method for time lapse reservoir monitoring  
A method of comparing multiple seismic survey data sets of a reservoir, is provided, wherein a first seismic survey data set is taken at a first time and a second seismic survey data set is taken...
6388947 Multi-crosswell profile 3D imaging and method  
Characterizing the value of a particular property, for example, seismic velocity, of a subsurface region of ground is described. In one aspect, the value of the particular property is represented...
6374185 Method for generating an estimate of lithological characteristics of a region of the earth's subsurface  
The invention in a first embodiment comprises a system for generating an estimate of lithological characteristics of a region of the earth's subsurface. A correlation is generated between...
6351717 Method and system for enhancing the accuracy of measurements of a physical quantity  
A method for determining measurements of a surface includes determining a trend for a plurality of measurements and determining, for each of at least one of the plurality of measurements, an...
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...
6327537 Multi-shooting approach to seismic modeling and acquisition  
A multi-shooting approach to seismic modeling and acquisition where several shot gathers can be generated simultaneously. The method is called a multi-shooting approach to seismic modeling and...
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...
6226596 Method for analyzing and classifying three dimensional seismic information  
Volume Seismic textures are evaluated using a Voxel Coupling Matrix (VCM) to capture and characterize three dimensional seismic reflection patterns. To extract the VCM seismic textural information...
6169959 Method of predicting kinematics for surface multiples  
Traveltimes of multiply reflected seismic events in a seismic profile or a model are determined from traveltimes for primary events. The traveltimes for the primary events may be obtained by ray...
6166994 Seismic detection apparatus and method  
A method of seismic exploration while drilling from within a borehole containing fluid, with a source and receivers positioned in the borehole is provided, comprising detecting small amplitude...
6138076 Automatic non-artificially extended fault surface based horizon modeling system  
An automatic, non-artificially extended, fault surface based horizon modeling method and apparatus produces a final faulted horizon model which is a three dimensional representation of a faulted...
6106561 Simulation gridding method and apparatus including a structured areal gridder adapted for use by a reservoir simulator  
A Flogrid Simulation Gridding Program includes a Flogrid structured gridder. The structured gridder includes a structured areal gridder and a block gridder. The structured areal gridder will build...
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...
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...
6049509 Method of processing seismic data to obtain the travel time curve  
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...
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...
6021379 Method for reconstructing seismic wavefields  
A method for reconstructing a selected seismic wavefield at a designated common midpoint and offset location from a set of prestack seismic data traces. The method uses actual data traces from...
6018498 Automated seismic fault detection and picking  
A computer implemented method and apparatus is disclosed for automatically picking faults in a recorded 3D seismic trace data volume. The method employs test planes, which are mathematically...
6018499 Three-dimensional seismic imaging of complex velocity structures  
Accurate and reliable traveltimes for a seismic exploration volume having a complex velocity structure are generated by selectively advancing a traveltime front at its minimum traveltime grid...
6018500 Radon moveout  
A conventional CMP gather is Radon transformed from t-x space to the τ-p domain. The Radon-transformed data are windowed or zoned into a plurality of data sets, each having an common independent...
6016287 Apparatus and method for accurately determining the location of events such as peaks in seismic data  
An operator sitting at a workstation views, on a display, a multitude of seismic traces having one or more horizons indicated therein by a plurality of sets of events (such as peaks or troughs or...
6002639 Sensor configuration for nulling reverberations to image behind reflective layers  
A transducer configuration disposed within a wellbore sonde for acoustically imaging a target region behind an acoustically reflective layer includes a transmitting transducer for producing a...
Matches 51 - 100 out of 242 < 1 2 3 4 5 >