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7542373 |
Vector 3-component 3-dimensional kirchhoff prestack migration
An apparatus and a method for migration of three components, 3-Dimensions seismic (3-C, 3-D) data acquired by down-hole receivers and surface seismic sources. This method utilizes full 3 components...
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7508734 |
Method and apparatus for acoustic data transmission in a subterranean well
The disclosure describes a method and apparatus for effectively communicating data along an acoustic transmission path. The method comprises driving an acoustic transmitter to send a data signal...
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7496488 |
Multi-scale finite-volume method for use in subsurface flow simulation
A multi-scale finite-volume (MSFV) method to solve elliptic problems with a plurality of spatial scales arising from single or multi-phase flows in porous media is provided. The method efficiently...
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7440853 |
Systems and methods for detecting shallow buried objects
The invention relates to a seismic system having an array of nodes, each capable of emitting and detecting seismic signals. The array of nodes is mounted on a mobile platform in a certain geometry...
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7391673 |
Method of wide azimuth seismic acquisition
According to a preferred aspect of the instant invention, there is provided a system and method for acquiring seismic data in a marine environment, wherein at least two source vessels are used in...
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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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6928367 |
Reservoir fracture characterization
Systems and methods of reservoir fracture characterization are disclosed. In one embodiment, the method includes: 1) obtaining seismic traces; 2) combining seismic traces into gathers that reveal...
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6894949 |
Walkaway tomographic monitoring
Surface seismic sources are used to simulate crosswell data between the two wells, and, using surface receivers, reflection seismic data are obtained over the region between the two wells....
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H002116 |
Method for detecting, locating, and characterizing single and multiple fluid-filled fractures in fractured formations
A method to analyze full waveform multiple (i.e., monopoles, dipoles, quadrupoles) acoustic measurements in a fluid-filled borehole, surrounded by a system of fractures oriented parallel to the...
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6816435 |
Method for estimating the position of a drill
The present invention relates to a method for estimating the position and trajectory of a drill during drilling of boreholes in rock. The method comprising the steps of determining the starting...
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6754590 |
Seismic surveying method
An improved method of acquiring seismic data using a plurality of vibratory seismic sources including the steps of deploying a seismic sensor deploying a plurality of vibratory seismic sources at...
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6691073 |
Adaptive state space signal separation, discrimination and recovery
This invention unifies a set of statistical signal processing, neuromorphic systems, and microelectronic implementation techniques for blind separation and recovery of mixed signals. A set of...
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6564150 |
System and method for orienting seismic energy receivers to yield discriminated vertical shear waves
A system for, and method of, orienting seismic energy sources and seismic energy receivers to substantially separate a compressional wave from a vertical shear wave. The method includes reflecting...
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6545944 |
Method for acquiring and processing of data from two or more simultaneously fired sources
A method of seismic surveying and seismic data processing using a plurality of simultaneously recorded seismic-energy sources. An activation sequence for each of said plurality of seismic energy...
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6498990 |
System and method for orienting seismic energy sources and receivers to yield discriminated horizontal and vertical shear waves
A system for, and method of, orienting seismic energy sources and seismic energy receivers to yield discriminated horizontal and vertical shear modes. In one embodiment, the system includes: (1) an...
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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...
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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...
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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...
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6044040 |
Wide-azimuth, radially-directed seismic data acquisition method
A method of acquiring seismic data locates a central position above a peaked stratigraphic subsurface. The method then positions receiver lines radially out from the central position, angularly...
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6028819 |
Method and system of simulating and optimizing land seismic operations
A method and system for simulating and optimizing land seismic survey operations. The method and system utilizes spatially referenced data and nonspatial data relevant to land seismic survey...
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6026058 |
Method for sorting seismic data
An improved method for gathering traces in a 3-D seismic survey is disclosed. In one configuration, receiver lines having equally spaced geophone receivers stations are run in one direction, and...
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6026059 |
Method of creating common-offset/common-azimuth gathers in 3-D seismic surveys and method of conducting reflection attribute variation analysis
Processes are described for providing a data set useful for performing analysis of reflection attribute variation among traces in a window of three-dimensional seismic data, wherein the traces have...
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6002640 |
Seismic data acquisition system
A seismic data acquisition system is featured that utilizes a series of nearly identical seismic shots (SISS) to synchronize and to communicate with novel data acquisition units (NDAU) located in...
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5973995 |
Method of and apparatus for marine seismic surveying
The present invention enables both deep marine seismic surveys and site seismic surveys to be performed simultaneously. A survey vessel tows a first seismic array (6, 16, 20) for a deep survey and...
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5963879 |
Binning of three dimensional seismic data
Three dimensional seismic survey data are acquired and processed using a hexagonal sampling grid. The seismic data are grouped into hexagonal bins defined by the hexagonal grid instead of into...
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5924049 |
Methods for acquiring and processing seismic data
A method for acquiring and processing seismic survey data from two or more seismic sources activated simultaneously or nearly simultaneously or for a single source moved to and fired at different...
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5787051 |
Three-dimensional seismic acquisition
A method of three-dimensional seismic acquisition comprising providing a plurality of substantially parallel source/receiver lines, each said source/receiver line comprising a linear array of...
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5774690 |
Method for optimization of element placement in a thinned array
A method for generating a thinned array having an optimal directional response wherein an initial population of possible element occupancy patterns is generated and a relative fitness value for...
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5771202 |
Method for acquisition of seismic data at sea
A method for acquisition of seismic data from an area surveyed using a group of seismic energy sources and a group of seismic streamer cables, particularly a marine area, includes forming a first...
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5761152 |
Method and system for increasing fold to streamer length ratio
A method and system are provided for use in marine seismic data surveys to increase fold and offset without increasing streamer length or drag on the streamer boat. Generally the method comprises...
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5717655 |
Method for providing uniform subsurface coverage in the presence of steep dips
A method for minimizing non-uniform insonification of subsurface formations in the presence of steep dips when advancing a swath of elongated parallel seismic streamer cables along a line of...
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5648938 |
Seismic data acquisition
A system for acquiring and processing seismic data comprises source-means for generating sound waves and receiver-means for recording as data those waves as reflected from sub-surface interfaces,...
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5598378 |
Method of performing high resolution crossed-array seismic surveys
This invention provides a method for performing three dimensional seismic surveys. In one configuration, receiver lines containing equally spaced receiver stations run in one direction while the...
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5555530 |
Method for improving signal to noise ratio
A method for improving the signal to noise ratio from a pair of detectors such as geophones which each detect a noisy signal comprising a signal of interest (S) and a noise signal (N), wherein the...
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5511040 |
Method for calculating the optimum vibrator spacing for ground roll reduction
A method for increasing the signal-to-coherent-noise ratio of seismic signals propagating along multi-azimuthal trajectories by abating Rayleigh wave contamination. A plurality of seismic receivers...
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5508973 |
Method for determining the principal axes of azimuthal anisotropy from seismic P-wave data
A method for measuring the principal axis of fracture-induced formation anisotropy. Amplitude vectors are measured from CMP gathers oriented along in-line and cross-line wavefield trajectories. The...
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5490120 |
Method of imaging overturned waves
An overturned wave is identified in initial seismic data and revised seismic data gathering parameters are calculated (e.g., a range of locations for a seismic source and detectors laterally...
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5487052 |
Three dimensional seismic data acquistion using a repeating offset arrangement of source and receiver lines
An improved method of three-dimensional seismic acquisition of sub-surface impedance boundaries in the earth is disclosed. A rectangular grid pattern is formed from a series of substantially...
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5430689 |
Method for acquiring marine seismic data having statistically distributed azimuths and offsets
A method of performing a marine seismic survey is disclosed Seismic receivers, either hydrophones or geophones, are deployed in a set of parallel lines in the survey area. The acoustic energy is...
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5402391 |
Arrangement of source and receiver lines for three-dimensional seismic data acquisition
The invention involves providing a plurality of substantially parallel and equally spaced source lines, each of which are formed by a plurality of equally spaced seismic energy sources. A plurality...
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5285423 |
Method of broadline seismic data acquisition
A broadline seismic survey is carried out by positioning a plurality of areal arrays of seismic detectors along each of a plurality of broadline receiver lines along the surface of the earth. Array...
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5231251 |
Apparatus and method for the acquisition of seismic data
The invention comprises a seismic recording apparatus and method. A multichannel recorder is connected to a cable formed from a plurality of signal conductors. Each of the signal conductors is...
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5111437 |
Method for positioning seismic sources to flatten CDP fold in VSP surveys
Method and system for creating a vertical seismic profile (VSP) whereby the spacing interval between units, either seismic sources or receivers, in a borehole increase exponentially as their...
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5029145 |
Methods of geophysical exploration
A novel method of geophysical exploration is provided whereby shot points and receiver locations are positioned such that seismic data resulting therefrom can advantageously be processed employing...
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4970696 |
Method for conducting three-dimensional subsurface and marine seismic surveys
A method for conducting a three-dimensional subsurface seismic survey utilizing a plurality of seismic receivers arranged in an orthogonally uniform pattern is disclosed. A predetermined pattern of...
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4964088 |
Method for tomographically laterally varying seismic data velocity estimation
A process for tomographic development of seismic section data having known source and receiver positions. The process employs forward modeling to estimate travel times of the rays through the earth...
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4955952 |
Seismic energy source array
A source array useful in vertical seismic profiling is disclosed wherein a first set of source elements having horizontal extent is spaced to have at least a first direction and a second direction,...
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4933912 |
Three dimensional seismic prospecting method
A 3-D seismic prospecting method is provided which employs an areal array of sources and receivers by which seismic traces are generated. The areal array is segregated into a plurality of shells...
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4930110 |
Method for conducting three-dimensional subsurface seismic surveys
A method for conducting a three-dimensional subsurface seismic survey utilizing a plurality of seismic receivers arranged in an orthogonally uniform pattern is disclosed. A predetermined pattern of...
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4914636 |
Method and device for acquisition of seismic data
In a method of acquiring seismic data in a prospecting area, an array of excitation vibration receivers is placed on or over the terrestrial surface. A plurality of excitation vibration sources is...
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