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7640110 |
Pixel based inversion method for surface electromagnetic measurement
A method of determining the nature of a submarine or subterranean reservoir having an electromagnetic characteristic is described. The method comprises analyzing data associated with the...
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7632349 |
Silicon wafer surface defect evaluation method
There is provided a silicon wafer surface defect evaluation method capable of readily detecting a region where small crystal defects exist, the evaluation method comprising: a rapid heat treatment...
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7620498 |
Automated borehole image interpretation
A method of analyzing characteristics of a subterranean formation includes transmitting a signal at least partially into a material of the subterranean formation such that the signal is transformed...
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7612566 |
Method and apparatus for the use of multicomponent induction tool for geosteering and formation resistivity data interpretation in horizontal wells
Measurements made with a multicomponent logging instrument when used in a substantially horizontal borehole in earth formations provide diagnostic of the direction of beds relative to the position...
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7603158 |
Current density impedance imaging (CDII)
A method for non-invasive mapping (imaging) of the electrical impedance of an object. The present invention provides a method, current density impedance imaging (CDII) which produces an impedance...
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7567869 |
Induction tool for detail evaluation of near borehole zone
Measurements made with an induction logging tool are processed to provide a resistivity model of fluid invasion of the formation. Up to five zones can be determined over a radial distance of about...
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7565244 |
Method and system for removing effects of conductive casings and wellbore and surface heterogeneity in electromagnetic imaging surveys
Characterizing a reservoir with electromagnetic imaging surveys includes normalizing measured voltage data by transmitter moment, sorting the normalized voltage data into common receiver profiles,...
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7539279 |
Logarithmic spectrum transmitter waveform for controlled-source electromagnetic surveying
Waveforms for controlled source electromagnetic surveying. The waveforms have frequency spectra that include three or more frequencies spaced at substantially equal intervals on a logarithmic...
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7474101 |
Method for combined transient and frequency domain electromagnetic measurements
A method for interpreting transient electromagnetic survey data includes imparting an electromagnetic field in the Earth's subsurface by passing electric current through a transmitter antenna. The...
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7450053 |
Logging device with down-hole transceiver for operation in extreme temperatures
A logging radar system and method for measuring propped fractures and down-hole formation conditions in a subterranean formation including: a radar source; an optical source; an optical modulator...
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7439977 |
Method of displaying three-dimensional vector orientations on a two-dimensional surface
A method for generating, displaying and manipulating the orientation of three-dimensional vectors on a two-dimensional surface for visualization, statistical analysis and correlation. The method...
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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,...
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7411512 |
Tracking the geographic location of an animal
Systems and techniques for tracking the geographic location. In one aspect, a method includes receiving timed magnetic field information descriptive of a magnetic field to which a magnetometer was...
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7298869 |
Multispectral data acquisition system and method
A portable multispectral data acquisition system for use on a vehicle such as an aircraft comprises a plurality of gyroscope-stabilized remote sensing devices synchronized to simultaneously capture...
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7248052 |
Electric power grid induced geophysical prospecting method and apparatus
A geophysical prospecting method and apparatus that utilizes the harmonics and sub harmonics waves induced into the earth by the electric power grid. The amplitude-frequency data are converted to...
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7218244 |
Common interface architecture for horizontal directional drilling machines and walk-over guidance systems
A system and method of interfacing a drilling machine with one of a number of different walk-over guidance systems involves receiving an ID signal from a particular walk-over guidance system...
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7117093 |
Method, media, and signals for processing seismic data to obtain a velocity field
A method and apparatus for estimating a seismic velocity field from seismic data including time-amplitude representations associated with source-receiver locations spaced apart by an offset...
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7106194 |
Method for metal object identification using a three-dimensional steerable magnetic field antenna
A method for identifying a buried metal object using a three-dimensional steerable magnetic field (3DSMF) system. The method comprises generating a magnetic field vector (MFV) at a first MFV...
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7088097 |
Method for fitting a sum of exponentials to experimental data by linearization using a numerical integration approximation, and its application to well log data
A method for analyzing formations using measurements from a detector in response to energy imparted therein. The measurements have characteristics which exponentially reduce in magnitude with time....
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7071694 |
Magnet assembly of an MRI system with concentric annular ferromagnetic laminations
The present invention is a saturated ferromagnetic structure for controlling the homogeneity of the primary magnet field of a magnet in a Magnetic Resonance Imaging system. The structure has a...
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7042801 |
System for geophysical prospecting using induce electrokinetic effect
Methods are disclosed employing seismic waves having infrasonic frequencies in the range of about 0.1–20 Hz for generating electromagnetic waves of similar infrasonic frequency in hydrocarbon...
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6972678 |
Wireless-based system and method for hull-based sensing
The present invention describes a wireless system and method for distributing sensors in large numbers that makes possible the application of a number of algorithms for the extraction of important...
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6969844 |
Multiple-axis linearly-propelled rotating sensor apparatus
A ground penetrating antenna apparatus and method are provided for locating underground objects via radar, sonar, or similar methods. The apparatus includes one or more antennas that are rotatably...
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6927698 |
Shuttle-in receiver for radio-imaging underground geologic structures
A coal bed anomaly detection and imaging system comprises a synchronous transmitter and receiver that are separated by a geologic structure with embedded and hidden anomalies. The receiver is...
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6891376 |
Method for attenuating conductive sonde mandrel effects in an electromagnetic induction well logging apparatus
An electromagnetic induction logging method is disclosed. The method includes measuring electromagnetic induction response in earth formations surrounding a wellbore. The measuring is performed on...
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6845936 |
Stable heli-borne vector platform for performing geophysical measurements
A stable heli-borne vector platform capable of accepting a range of different sensors or instruments, particularly, but not exclusively, for the mapping and exploration of mountainous regions is...
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6714153 |
Device for electromagnetic detection of geological properties in a well
The invention is a well radar for detecting, by electromagnetic wave reflection, resistivity horizons in production zones in oil wells. Transmitter and receiver antennas are combined in a tubing...
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6697102 |
Bore hole camera with improved forward and side view illumination
An elongate rugged cylindrical metal housing encloses rotatable forward looking and side looking video cameras for inspecting bore holes of water, oil and natural gas wells. A ring-shaped array of...
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6670813 |
Integrated borehole system for reservoir detection and monitoring
A method is disclosed for generating an image of earth formations penetrated by a wellbore. The method includes generating an initial model of the earth formations using formation resistivity...
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6664788 |
Nonlinear electroseismic exploration
A method for seismic exploration using nonlinear conversions between electromagnetic and seismic energy, with particular attention to the electromagnetic source waveform used. According to the...
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6646440 |
Device for measuring shifts in mountains
Shifts in rock strata are measured be inserting into a bore hole in the rock a conductive tube in which an insulated conductor runs along the length and the continuity is measured between the...
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6505509 |
Apparatus and method for measuring the level of a fluid
An apparatus for detecting a fluid level is disclosed, which includes a coaxial sensor having a pair of conducting tubes positioned with respect to each other in spaced coaxial arrangement, a...
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6476608 |
Combining seismic waves with seismoelectrics to perform prospecting and measurements
A method and apparatus for low cost, convenient prospecting and surveys of subsurface structures using seismoelectric signals, as well as laboratory analysis of geological samples. The...
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6462549 |
Method and system for electroseismic monitoring of microseismicity
A method and system for determining the location of a microseismic event is disclosed. An electromagnetic sensor measures the electromagnetic energy which is caused by a microseismic event. Seismic...
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6452395 |
Enhanced detection method
A method and apparatus for determining properties of rocks surrounding a borehole in which electrokinetic signals are generated in the rocks is disclosed. For example, the signals may be generated...
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6393363 |
Method and apparatus for the measurement of the electrical resistivity of geologic formations employing modeling data
Provided are a method, a computer program product and a system, to measure characteristics of a geologic formation, such as hydrocarbon reservoirs, that employs modeling data to remove unwanted...
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6392317 |
Annular wire harness for use in drill pipe
An annular wire harness for use in drill pipe comprising two rings interconnected by one or more insulated conductors. The rings are positioned within annular grooves located within the tool joints...
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6380745 |
Electrical geophysical apparatus for determining the density of porous materials and establishing geo-electric constants of porous material
The invention includes an apparatus for determining geo-electric data and the density of a porous material. A resistivity-measuring device applies an electrical current through an electrode array...
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6307375 |
Seismic activity predictor in proximity with the earth including a dielectric for receiving precursor seismic electromagnetic waveforms
A method of detecting precursor seismic electromagnetic waveforms and predicting future seismic activity in the form of an earthquake by placing a detector including a dielectric material in...
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6225806 |
Electroseismic technique for measuring the properties of rocks surrounding a borehole
Apparatus and method for measuring the properties of rocks such as permeability, porosity and fluid properties downhole around a borehole (3) in which a seismic source (6) which radiates a seismic...
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6049209 |
Axial resolution enhancement method for resistivity well logs which accounts for lateral variations in the resistivity of earth formations penetrated by a wellbore
A method for enhancing the axial resolution of conductivity well log measurements of in earth formation zones radially distal from a wellbore. The method includes calculating differential axial...
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6018244 |
Method for detecting diastrophism by detecting VHF radio waves reflected by the ionosphere
A diastrophism detection method and an apparatus therefor are provided which is capable of predicting a position of occurrence of diastrophism such as an earthquake or the like, a scale thereof,...
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5999885 |
Method and apparatus for automatically identifying fault cuts in seismic data using a horizon time structure
An interpretation workstation based apparatus having an "Auto Fault" software stored therein automatically identifies a plurality of fault cuts in each of a plurality of horizons in a seismic data...
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5990809 |
Underwater surveying system
The hydrography of a land area beneath a shallow body of water is determined by driving a submersible, remotely controlled, powered vehicle along a route over the land area. The vehicle includes a...
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5939885 |
Well logging apparatus having a separate mounting member on which a plurality of antennas are located
Apparatus for sensing the resistivity of geological formations surrounding a borehole includes a tubular body member (1) which is adapted to form a portion of a length of drill string. An antenna...
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5903153 |
Apparatus and method for detecting underground liquids
A method and apparatus for detecting underground liquids is disclosed in which the electrical potential generated by a seismic shock is detected and measured with respect to a base point insulated...
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5877995 |
Geophysical prospecting
Method and apparatus are provided for a new type of geophysical prospecting. The method applies an electric field to a fluid-containing porous subsurface formation to create a fluid pulse from...
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5861751 |
Electrical geophysical methods and apparatus for determining the in-situ density of porous material
The invention includes a method and device for determining the in-situ density of a porous material. A resistivity measuring device applies an electrical current through an electrode array to...
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5861750 |
Geophysical methods and apparatus for determining the hydraulic conductivity of porous materials
A method and device for determining the hydraulic conductivity of porous materials is disclosed. The method uses a general permeability equation for calculating the hydraulic conductivity. The...
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5841280 |
Apparatus and method for combined acoustic and seismoelectric logging measurements
A method for estimating porosity of an earth formation from measurements of acoustic energy traversing the earth formation and from measurements of seismoelectric voltages generated in the...
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