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7609585 |
Method for sub-salt migration velocity analysis
A method for interpreting seismic data below a salt layer includes depth migrating the seismic data to a bottom of the salt layer. The migrating including generating an initial model of velocities...
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7603238 |
Analysis of time-series data using singularities
A method for acquiring and analyzing time-series data using singularities is described. This method allows for the analysis of data over a wide spectrum of frequencies. Once the data is acquired in...
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7596056 |
Method and program for fracture plane reconstruction
The invention relates to a method for fracture plane reconstruction in a three-dimensional set ( 20 ) of values, comprising the steps of providing a computer with the three-dimensional set, display...
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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...
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7574303 |
Seismogram correction for absorption effects
Correcting seismograms to compensate for absorption or dissipative effects that occur in the earth. In one implementation, a ratio of traveltime (t) to absorption parameter (Q) may be computed for...
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7555389 |
Creating an Absorption Parameter Model
To generate an absorption parameter model, estimated values of an effective absorption parameter are received, where the estimated effective absorption parameter values represent absorption...
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7525873 |
Seismic inversion of conditioned amplitude spectra
According to a preferred aspect of the instant invention, there is provided herein a system and method for using both a temporal zone of seismic data and conditioned amplitude spectra thereof to...
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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 interpolating...
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7493241 |
3D velocity modeling, with calibration and trend fitting using geostatistical techniques, particularly advantageous for curved for curved-ray prestack time migration and for such migration followed by prestack depth migration
A method of constructing a 3D geologically plausible velocity model for efficient and accurate prestack imaging wherein embodiments of the invention provide: (1) a method of calibrating velocity...
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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...
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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...
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7454292 |
Inverse-vector method for smoothing dips and azimuths
A system and method using inverse-vector processing to iterate through a loop of three steps: set a guide direction, invert opposite vectors, and average vectors to update the guide direction, for...
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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...
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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...
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7424367 |
Method for predicting lithology and porosity from seismic reflection data
Method for predicting lithology and porosity of subsurface rocks from seismic reflection data. The seismic data is inverted to yield elastic properties of the rocks such as the compressional and...
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7391675 |
Microseismic event detection and location by continuous map migration
The present invention provides methods and systems for microseismic hydraulic fracture monitoring in real-time. The methods and systems of the present invention may include continuous map migration...
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7388808 |
Method for depth migrating seismic data using pre-stack time migration, demigration, and post-stack depth migration
A method is disclosed for depth migrating seismic data. The method includes pre-stack time migrating the seismic data to form a stacked, time migrated image. The stacked, time migrated image is...
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7373251 |
Method for predicting quantitative values of a rock or fluid property in a reservoir using seismic data
A method is provided for predicting a value of a designated rock or fluid property in a subterranean geologic volume. A first predicted value of the designated rock or fluid property is also...
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7359284 |
Method for processing borehole seismic data
Seismic data recorded by subsurface seismic sensors placed in a borehole, such as an oil or gas well, are transformed via a process of upward wavefield propagation to pseudo-receivers at the...
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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...
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7337069 |
Method of simulating the sedimentary deposition in a basin respecting the thicknesses of the sedimentary sequences
The method of the invention allows, by means of an iterative inversion algorithm, prediction of the spatial distribution of the lithologic composition of sediments deposited in a sedimentary basin...
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7337067 |
System and method for attaching drilling information to three-dimensional visualizations of earth models
A system and method for perceiving drilling learning through visualization is provided. In one embodiment using three-dimensional visualization of the earth model as a foundation, a new IT...
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7328139 |
Device and software package for extracting a geological horizon and related properties
The invention concerns a method for extracting a geological horizon and related properties of a seismic representation, comprising a step ( 100 ) which consists in digital modeling with continuous...
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7310579 |
Method for generating a reservoir model on flexible grid
A method having application notably to the development of petroleum reservoirs for fast generation of a geostatistical reservoir model on flexible grid, representative of a porous heterogeneous...
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7295930 |
Method, device and software package for smoothing a subsurface property
The invention concerns a method for smoothing a subsurface property in a geological structure represented by seismic measurements comprising a step ( 100 ) which consists in digital modelling by...
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7283911 |
System and method for interpreting reverse faults and multiple z-valued seismic horizons
A system and method for interpreting reverse faults and multiple z-valued seismic horizons. A platform executable on a computer is provided for interpreting seismic data. The platform includes a...
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7266041 |
Multi-attribute background relative scanning of 3D geophysical datasets for locally anomaluous data points
Methods for scanning geophysical data sets to find geological entities with specific geophysical responses entail selecting a focus sub-volume and a background sub-volume proximal to the focus...
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7254091 |
Method for estimating and/or reducing uncertainty in reservoir models of potential petroleum reservoirs
A method for estimating and/or reducing uncertainty in reservoir models of potential petroleum reservoirs comprises receiving the results of a stochastic seismic inversion, and transforming the...
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7248539 |
Extrema classification
A method for automated extraction of surface primitives from seismic data is presented. A preferred embodiment of the method includes defining, typically with sub-sample precision, positions of...
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7242637 |
Time-lapse seismic survey of a reservoir region
A method of investigating a reservoir region in a subsurface formation by a time-lapse seismic survey. The subsurface formation comprises a further formation region adjacent to the reservoir...
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7181347 |
Method for the 3-D prediction of free-surface multiples
Method and apparatus for predicting surface multiples, which includes (a) selecting a target subsurface line (SSL); (b) selecting an input SSL within an aperture of the target SSL; (c) selecting a...
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7110323 |
Method, system and apparatus for interpreting seismic data using duplex waves
A Method for Interpreting Seismic Data Using Duplex Waves is described. Whereas substantially horizontal boundaries are readily identified using conventional processing methods based on primary...
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7095678 |
Method for seismic imaging in geologically complex formations
A method for multipath imaging of three-dimensional volumes of seismic data, given the subsurface velocity distribution. Ray tracing is used to generate the volumes of information needed for...
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7095677 |
Crossplot analysis of A.V.O. anomolies in seismic surveying
A method of seismic data analysis to provide clustering of A.V.O. data into A.V.O. anomaly types, the method comprising: obtaining successive values of a plurality of seismic attributes, each...
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7088639 |
Method for determining formation quality factor from well log data and its application to seismic reservoir characterization
A method for seismic characterization of subsurface Earth formations includes determining at least one of compressional velocity and shear velocity, and determining reservoir parameters of...
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7082367 |
Seismic data calibration using crossplotted AVO attributes
Disclosed herein are systems and methods for calibrating seismic data using seismic attribute pairs such as amplitude versus offset (AVO) attributes. In one embodiment, a method includes: receiving...
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7069174 |
Evaluating method for testing of simple geometry and complete gauging of the work pieces with defined tolerance zones
An integral evaluation method for a complete numerical gauging of work pieces includes building an integral objective as a polynomial composed of two different objective groups and multiplying each...
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7046581 |
Well-to-well tomography
A method of obtaining a spatial model of a property of part of a subsurface formation located between underground seismic receivers in which at least two sets of pairs of seismic receivers are...
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7027354 |
Method of obtaining pore pressure and fluid saturation changes in subterranean reservoirs by forward modeling
Representative embodiments provide for a computer including a program code configured to cause a processor to invert and thereafter calibrate first and second data sets, subtract the inverted...
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7024021 |
Method for performing stratigraphically-based seed detection in a 3-D seismic data volume
The invention is a method for performing a stratigraphically-based seed detection in a 3-D seismic data volume. The method incorporates criteria that honor the layered nature of the subsurface so...
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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...
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6985404 |
Method and apparatus of performing amplitude variation with offset analysis
A method for performing amplitude variation with offset (AVO) analysis of a plurality of seismic data traces. The method includes fitting at least a two-term AVO equation to at least three seismic...
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6982927 |
Method for processing seismic data to identify anomalous absorption zones
A method is disclosed for identifying zones anomalously absorptive of seismic energy. The method includes jointly time-frequency decomposing seismic traces, low frequency bandpass filtering the...
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6980482 |
Seismic survey system
A method of analyzing seismic survey data in which a transfer function for a geological model is derived by ray tracing techniques applied to theoretical data and the transfer function is applied...
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6977866 |
Method and process for prediction of subsurface fluid and rock pressures in the earth
A method of determination of fluid pressures in a subsurface region of the earth uses seismic velocities and calibrations relating the seismic velocities to the effective stress on the subsurface...
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6970397 |
Determination of fluid properties of earth formations using stochastic inversion
A method of determining a fluid property in a subsurface region of interest of an earth formation uses measurements of seismic attributes on seismic data. For a test region, a plurality of...
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6965849 |
Method of designing geophysical surveys
A method for the design of VSP surveys for the purpose of imaging a reef in the formations surrounding the well in question. The basic steps include:
building a geophysical model; defining...
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6925031 |
Method of using electrical and acoustic anisotropy measurements for fracture identification
Measurements made by a cross-dipole acoustic logging tool in a borehole are processed to determine the principal directions of azimuthal anisotropy of a subsurface formation. Measurements...
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6922373 |
Method of estimating relative bearing of a borehole receiver
The invention is a method for determining the orientation of a multi-component receiver where the preferred embodiment of the method makes use of an approximation of the relative bearing angle...
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6917564 |
Method of processing seismic data
A method of processing seismic data, for example surface seismic data such as multi-component OBC (Ocean Bottom Cable) seismic data, comprises using vertical seismic profile (VSP) seismic data to...
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