Matches 151 - 200 out of 430 < 1 2 3 4 5 6 7 8 9 >


Match Document Document Title
7813224 Seismic source/receiver probe for shallow seismic surveying  
Systems and methods are implemented for evaluating underground structures and objects, particularly relatively shallow underground structures and objects, using a seismic or acoustic source signal...
7797110 Method for velocity analysis using waveform inversion in Laplace domain for geophysical imaging  
A Laplace transform system comprising a processor, a measured time domain wavefield, a velocity model, and Laplace damping constants, wherein the processor is programmed to calculate a...
7778110 Processing seismic data representative of the acceleration wavefield  
A method of processing seismic data comprises processing data representative of the acceleration wavefield so as to obtain information about the earth's subsurface direct from the seismic data...
7773455 Time-lapse seismic acquisition  
Methods for generating a time lapse difference image. In one implementation, the method includes estimating a trace in a first seismic survey data set at each trace coordinate of a second seismic...
7773456 System and method for seismic data acquisition  
There is provided herein a system and method for the imaging and monitoring of hydrocarbon reservoirs and other subsurface features preferably using seabed or surface sensors in conjunction with...
7768871 Method of seismic processing of the type comprising depth migration before addition  
A seismic processing method of the migration type, comprising the steps of: linearly combining downgoing waves generated at a plurality of shotpoints, and also upgoing waves recorded by a...
7764573 Method of processing seismic data and method of producing a mineral hydrocarbon fluid and a computer program product  
A method of processing seismic data, wherein a digital seismic trace is provided comprising at least one seismic loop. A selected discrete wavelet transform of the digital seismic trace is...
7761237 Method for quantification and mitigation for dip-induced azimuthal AVO  
This patent delineates methods for quantifying and mitigating dip-induced azimuthal AVO effects in seismic fracture detection using Azimuthal AVO analysis by accurately accounting for the...
7751279 Sub-salt reflection tomography and imaging by walkaway VSP survey  
A walkaway VSP survey is carried out with receivers located in a borehole near the base salt. Reflection tomographic inversion of data from the walkaway VSP is used to derive a velocity model for...
7751277 Method for interpolating seismic data by anti-alias, anti-leakage Fourier transform  
An estimated frequency-wavenumber spectrum is generated by applying a first Anti-leakage Fourier transform method to unaliased frequency components in temporal-transformed seismic data and...
7725266 System and method for 3D frequency domain waveform inversion based on 3D time-domain forward modeling  
According to a first preferred aspect of the instant invention, there is provided an efficient method of computing a 3D frequency domain waveform inversion based on 3D time domain modeling. In the...
7720607 Method for treating seismic cubes corresponding, for a common zone on the ground, to different source/receiver and/or angle of incidence offset values  
Method for processing a set of seismic cubes corresponding to the same acquisition zone and at different source/receiver offset and/or angle of incidence values, characterized in that at least one...
7720609 Method of seismic signal processing  
A method of assessing acquisition errors in seismic images in a seismic data volume. The method includes selecting a seismic attribute in a seismic data volume and then stacking seismic quality...
7706211 Method of determining a seismic velocity profile  
A seismic velocity profile in a region of interest in a subsurface formation is determined using at least the following steps. (a) Activating a seismic source at a location n, thereby exciting a...
7680600 Method, system and apparatus for formation tester data processing  
A method for data processing includes transforming measurement data acquired in the time domain during an oilfield operation into a second domain to produce transformed data; identifying...
7679993 Method of characterizing a fractured reservoir using seismic reflection amplitudes  
A method of characterizing a fractured reservoir in a field includes measuring seismic reflection coefficient of the fractured reservoir as a function of angle of incidence and azimuth, predicting...
7675815 Time reverse reservoir localization  
A method and system for processing synchronous array seismic data includes acquiring synchronous passive seismic data from a plurality of sensors to obtain synchronized array measurements. A...
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...
7663970 Method for passive seismic emission tomography  
A method for seismic event mapping includes transforming seismic signals recorded at selected positions into a domain of possible spatial positions of a source of seismic events. An origin in...
7660204 Data acquisition method of non-real time transmitting seismic data acquisition system applied in mountainous area  
A data acquisition method of a non-real time transmitting seismic data acquisition system applied in mountainous areas. The format of original record file names is an 8 digit file name...
7656748 Method of determining impulse responses from a medium in relation to the transmission of waves between different points  
The invention relates to a method of determining impulse responses from a medium (2) in relation to the transmission of waves between different points (T1-TN). The inventive method consists in:...
7649805 Dispersion extraction for acoustic data using time frequency analysis  
This invention pertains to the extraction of the slowness dispersion characteristics of acoustic waves received by an array of two or more sensors by the application of a continuous wavelet...
7639564 3-D TAU-P interpolation  
Methods and apparatus for removing noise from signal traces collected during a seismic gather, particularly removing the aliased energy in the time-slowness (tau-P) domain so that aliasing noise...
7636275 Direct time lapse inversion of seismic data  
A method and system of seismic data processing includes acquiring first and second prestack seismic datasets wherein the seismic datasets have a time-lapse relationship. The first prestack seismic...
7636051 Status monitor apparatus  
A statistical value update unit calculates the fluctuation of measurement data. A filtering processing unit extracts a normal white noise component from the fluctuation of the measurement data...
7616524 Wavelet based intercept attribute for seismic exploration  
A wavelet-based method for improving the quality of seismic data utilizing the intercept determined by applying least squares regression to the wavelet transform of a seismic trace. The intercept...
7586811 Subsalt velocity model building  
Method for building a subsalt velocity model. In one implementation, the method may include determining a velocity of a sedimentary area surrounding a salt body, determining an initial velocity of...
7584056 Multiple suppression in angle domain time and depth migration  
Seismic data may be imaged using or recognizing substantially only primary reflections. Imaging seismic data may include for example integrating a plurality of seismic data points that have...
7577061 Process and program for characterising evolution of an oil reservoir over time  
Evolution of an hydrocarbon reservoir in the process of producing is carried out by co-analyzing the changes in the propagation times and seismic amplitudes of a seismic wavelet along propagation...
7554883 Fault filter for seismic discontinuity data  
Various methods are disclosed for identifying faults in a seismic data volume. In some method embodiments, the fault identification method comprises determining a planarity value for each of...
7523003 Time lapse marine seismic surveying  
In a first aspect, a method for use in a time lapse, marine seismic survey includes accessing a set of baseline seismic data; accessing a set of acquired, time lapse seismic data; and...
7508735 Method of analyzing vertical seismic profile data, method of producing a hydrocarbon fluid, and a computer readable medium  
A P-wave slowness-polarization data set resolving P-wave slowness against P-wave polarization angle is extracted from a multi-offset vertical seismic profiling data set. A function relating P-wave...
7502690 System and method for using time-distance characteristics in acquisition, processing, and imaging of t-CSEM data  
There is provided herein a system and method of acquiring, processing, and imaging transient Controlled Source ElectroMagnetic (t-CSEM) data in ways that are similar to those used for seismic...
7480206 Methods for earth modeling and seismic imaging using interactive and selective updating  
A method for creating an enhanced seismic image is described. Seismic data is acquired from a seismic survey conducted over a subterranean region. The seismic data is transformed into energy...
7463552 Method for deriving 3D output volumes using filters derived from flat spot direction vectors  
A method of determining the existence of and location of hydrocarbon and water fluid contacts by analyzing spatial changes in 3D seismic data. The method begins by obtaining seismic attribute data...
7460437 Seismic data processing method and system for migration of seismic signals incorporating azimuthal variations in the velocity  
A method and system for seismic data processing utilizes azimuthal variations in the velocity of seismic signals. The system and method utilizes a plurality of seismic energy sources that are...
7457195 Estimating the time of arrival of a seismic wave  
Data processing means are described for calculating an estimated time of arrival of a seismic or microseismic P or S wave at a sensor station, based on a P to S wave velocity ratio, a calculated...
7453767 Method for deriving a 3D GRAZ seismic attribute file  
A method of determining and analyzing spatial changes in the earth's subsurface. The method includes obtaining seismic attribute data as a 3D data volume and obtaining corresponding 3D dip and...
7453764 Method of imaging in an underground formations steep-sloping geologic interfaces, giving rise to prismatic reflections  
A method of imaging in an underground formation one or more steep-sloping geologic interfaces, which are not necessarily in a plane, by forming with primary reflectors, which are not necessarily...
7453765 Scattering diagrams in seismic imaging  
The analysis of scattering diagrams of the correlation-type representation theorem in inhomogeneous media is improved by the use of virtual events. Virtual events here are events which are not...
7447113 Kirchhoff prestack time migration method for PS waves  
A method is disclosed for migrating seismic data which includes determining travel time of a compressional wave from a source location to a scatter point, taking into account ray bending. Travel...
7436735 Method for seismic processing, in particular for compensating birefringence on seismic traces  
A method of seismic processing for obtaining information on the geophysics of the subsoil includes acquiring seismic traces at at least one point on the surface of the subsoil or in the subsoil,...
7433265 Converted wave energy removal from seismic data  
Coherent wave noise energy is removed from seismic data by modeling both the P-wave primary energy and the coherent wave noise energy. The P-wave primary energy is modeled first and then...
RE40475 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,...
7415401 Method for constructing 3-D geologic models by combining multiple frequency passbands  
A process for constructing a three-dimensional geologic model of a subsurface earth volume wherein resolution scales of multiple diverse data types, including seismic data, are accounted for by...
7414919 Method for improving the seismic resolution  
A method for improving the seismic resolution in the field of petroleum exploration and development, using the steps of: (1) ensuring the depth and the velocity of the low-velocity layer and the...
7408836 Method of and apparatus for processing seismic data in the presence of anisotropy  
A method of and apparatus for processing seismic data. A method of processing seismic data comprising the steps acquiring seismic data in at least two shots that have different source-receiver...
7397728 Method for processing a record of seismic traces  
An apparatus and method for processing a record of seismic traces. The method includes receiving the record of seismic traces in a time-offset domain, transforming the record of seismic traces to...
7382685 Method and apparatus for filtering irregularly sampled data  
A method and apparatus for filtering data acquired at a plurality of discrete data points is described, using the steps of defining a filter having defined filter values at defined filter points...
7355923 Seismic analysis using post-imaging seismic anisotropy corrections  
System and method for performing anisotropy corrections of post-imaging seismic data for a subsurface formation. The method may receive seismic data, preferably pre-stack seismic data comprising a...

Matches 151 - 200 out of 430 < 1 2 3 4 5 6 7 8 9 >