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8131469 |
Data acquisition and processing for invasion profile and gas zone analysis with NMR dual or multiple interecho spacing time logs
A method for obtaining a parameter of interest related to an earth formation, the method including: obtaining nuclear magnetic resonance (NMR) data from an NMR tool investigating the earth...
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8090538 |
System and method for interpretation of well data
Well log data is assigned depositional labels by a soft computing method. A model is trained on an expert-interpreted well log by segmenting, assigning fuzzy symbols to the segments, and...
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8082139 |
Displaying signals of a design block emulated in hardware co-simulation
Methods and systems for simulating an electronic system in a high level modeling system (HLMS). A design block and certain signals of the electronic system are selected. The selected signals...
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8082103 |
CO2 concentration correcting apparatus and CO2 concentration correcting method
Hourly CO2 concentration, amount of solar radiation, and plant distribution information are calculated through observation from predetermined satellites. A concentration of CO2 absorbed by...
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8073622 |
Long-range lightning detection and characterization system and method
A long-range lightning detection and characterization system and method. Electromagnetic radiation produced by a lightning strike is sensed at a sensing location and a measured signal...
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8050866 |
Pulsed-neutron formation density
A method and related system of determining formation density by compensating actual inelastic gamma rays detected from a pulsed-neutron tool for the effects of neutron transport. The method and...
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8024122 |
Method for determining formation water resistivity from a wireline pulsed neutron device
A method for estimating resistivity of a formation includes: selecting spectra collected by pulsed neutron instrument disposed down a wellbore traversing the formation, the spectra including...
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8000899 |
Borehole invariant porosity measurement method
The invention concerns a method for determining the porosity of an earth formation penetrated by a borehole. The method comprises conveying a tool along said borehole, wherein the tool comprises a...
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7991556 |
Methodology and application of multimodal decomposition of a composite distribution
A method for analyzing formation data includes decomposing the formation data into simple components that can be used to reconstruct the formation data, wherein the decomposing is performed at a...
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7933718 |
Method and tool for determination of fracture geometry in subterranean formations based on in-situ neutron activation analysis
A method for determining fracture geometry of a subterranean formation from radiation emitted from a fracture in the formation, including measuring gamma-radiation emitted from the fracture;...
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7818128 |
Forward models for gamma ray measurement analysis of subterranean formations
Methods and related systems are described for predicting a response of a gamma ray measurement tool located in a borehole surrounded by a subterranean formation. A response of the tool is...
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7805247 |
System and methods for well data compression
Systems and methods in which data compression techniques are utilized to fill a predetermined channel capacity are shown. According to one configuration, event data points within test data are...
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7765067 |
Geosteering in earth formations using multicomponent induction measurements
A multicomponent induction logging tool is used on a MWD bottomhole assembly. Multifrequency focusing that accounts for the finite, nonzero, conductivity of the mandrel is applied. Using separation...
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7700910 |
Method of compensating a density log
A method of compensating a density log comprises the step of compensating the far density by adding a correction at a given point in the density log wherein: (a) the correction comprises at least a...
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7623968 |
Determination of porosity and fluid saturation of underground formations
A method of determining the porosity and fluid saturation for a given volume of an underground formation through which a borehole is drilled, the method comprising: measuring, from within the...
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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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7596452 |
Compensated caliper using combined acoustic and density measurements
A logging-while-drilling density sensor includes a gamma ray source and at least two NaI detectors spaced apart from the source for determining measurements indicative of the formation density. An...
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7565833 |
Automatic adjustment of NMR pulse sequence to optimize SNR based on real time analysis
Data from a string of multiple formation evaluation data sensor are evaluated by an expert system. Based on the analysis, the logging speed is increased if all the sensors justify it, and is...
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7502692 |
Method and computer program product for estimating true intrinsic relaxation time and internal gradient from multigradient NMR logging
A method and a computer program product for estimating the true intrinsic relaxation time T2 and the internal gradient Gint for a multi-frequency nuclear magnetic resonance imaging tool for well...
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7495689 |
Multiple simultaneous language display system and method
A system and method which provides simultaneous display of characters on one or more display monitors in multiple languages. The languages can include icon based languages such as Chinese and...
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7439494 |
Method and apparatus for determining the thermal neutron capture cross-section of a subsurface formation from a borehole
Data acquired using a pulsed nuclear source are susceptible to two sources of error. One error is due to large statistical noise towards the end of an acquisition window. Another source of error is...
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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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7366615 |
Methods and apparatus using both nuclear capture and inelastic spectroscopy in deriving elemental concentrations
Methods and apparatus are provided for determining the content of a first element in a formation which cannot otherwise be determined via a capture spectrum measurement. The methods and apparatus...
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7361887 |
Measurement of formation gas pressure in cased wellbores using pulsed neutron instrumentation
A pulsed neutron tool with three or more detectors is used for making measurements inside casing. The measurements may be used to determine gas saturation at a constant gas pressure, pressure at...
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7337066 |
System and method for automated baseline correction for Raman spectra
A system and method for automated baseline correction for Raman spectra is disclosed which may operate as a piecewise-linear baseline correction function. In an embodiment, a first set of data...
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7334465 |
Integrated logging tool for borehole
An apparatus for measuring characteristics of earth formations surrounding a borehole, comprises a resistivity measurement device having a multiplicity of antennae spaced between each other in a...
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7328106 |
Method of correcting density logs for the presence of the casing
A gas detection method includes carrying out respective neutron and density logs, using neutron and density detectors, along a length of well. The density log is corrected for the dimensions and...
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7292942 |
Measuring formation density through casing
A method of determining formation density in a cased hole environment using a logging tool having a gamma ray source, a long spacing detector, and a short spacing detector that includes developing...
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7253402 |
Apparatus and method for determining thermal neutron capture cross section of a subsurface formation from a borehole using multiple detectors
A well logging instrument including a plurality of detectors having different precisions and accuracies, the more precise detectors generally having lower accuracies. The detectors are responsive...
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7254486 |
Method and apparatus for shale bed detection in deviated and horizontal wellbores
A relative dip angle of a deviated borehole is determined from natural gamma ray measurements. Dip corrected measurements are processed to determine the thickness of thin beds, and the peak gamma...
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7248963 |
Method and system for aircraft flow management
A method for managing the flow of a plurality of aircraft at an aviation resource, based upon specified data and operational goals pertaining to the aircraft and resource and the control of...
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7194360 |
Method of determining radioactive nuclides
A method of simply and quickly determining α-ray releasing nuclides having long half-life without carrying out a chemical separation is provided. By inputting a data of pulses incident to an ...
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7117092 |
Pulsed-neutron formation density
A method and related system of determining formation density by compensating actual inelastic gamma rays detected from a pulsed-neutron tool for the effects of neutron transport. The method and...
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7027924 |
Detecting natural gas pipeline failures
A method for detecting failures in a natural gas returning radiation from the pipeline; determining that there is a failure in the pipeline when the spectral or thermal signature indicates that...
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7006919 |
Real time continuous elemental measurement of bulk material
Methods and apparatus for continuous real-time measurement of bulk material using gamma irradiation and neutron irradiation. A DGA device monitors bulk material flow and produces a spectrum that is...
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6957145 |
Methods for determining characteristics of earth formations
A method for measuring one or more characteristics of an earth formation wherebyenergy is emitted circumferentially about a borehole into the formation, and the amount reflected back is detected...
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6944548 |
Formation evaluation through azimuthal measurements
A method for formation logging includes acquiring measurements of neutron-induced signals having azimuthal information using a neutron tool; processing the measurements into a plurality of...
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6909969 |
Method of through-casing gas detection
A gas detection method includes carrying out respective neutron and density logs, using neutron and density detectors, along a length of well. The density log is corrected for the dimensions and...
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6795792 |
Continuous flow method and system for placement of balancing fluid on a rotating device requiring dynamic balancing
Methods and systems for continuously transferring balancing mass to a rotating system or rotating device in order to dynamically balance the rotating system or rotating device are disclosed. A flow...
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6754586 |
Apparatus and methods for monitoring output from pulsed neutron sources
Techniques for monitoring a pulsed neutron source include measuring a burst count rate while the pulsed neutron source is turned on using a monitor detector disposed proximate the pulsed neutron...
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6751557 |
Rock classification method and apparatus
A rock classification system involves the use of a Ternary Diagram (TD) Model and a set of rules in a rule base. A computer, which stores a rock classification software which includes the rule...
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6738720 |
Apparatus and methods for measurement of density of materials using a neutron source and two spectrometers
A system for measuring density of material which can be embodied to measuring bulk density of material penetrated by a borehole. The probe component of the system comprises a source of neutron...
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6721661 |
Method of distinguishing types of geologic sedimentation
A method for interpolating the environment and geological age at all levels in a borehole from information provided by a limited number of depths and the use of a synthetic stratigraphic...
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6718265 |
Petrophysical property estimation using an acoustic calibration relationship
A method of estimating a petrophysical property of a subsurface area that includes deriving an acoustic calibration relationship correlating acoustic propagation characteristics of a first...
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6712140 |
3rd borehole radar antenna and algorithm, method and apparatus for subsurface surveys
The invention relates to a borehole radar tool comprising, in a housing (2) a transmitting antenna and a receiving antenna both of which comprise, near the housing wall (2), a dipole antenna (8)...
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6665616 |
Method for determining decay characteristics of multi-component downhole decay data
Measurements from many logging instruments such as Gamma ray counts from a pulsed neutron instrument, typically have a spectrum that contains a plurality of exponentially decaying components. The...
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6646437 |
System and method for clay typing using NMR-based porosity modeling
System and method for characterizing formation properties based on NMR measurements. NMR clay measurements of this invention distinguish between interstitial pore water and the water adsorbed by...
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6405143 |
Method and system for determining potential fields
A method for determing the potential in a three-dimensional domain containing a source domain of source particles and a target domain of target particles involves assigning the source particles...
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6366859 |
Method of detecting breaks in logging signals relating to a region of a medium
Method of detecting breaks in logging signals consisting of logs of different kinds recorded as a function of depth, of the type consisting in selecting a portion from each of the said logs in such...
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6339717 |
Medical examination system, particularly a magnetic resonance system
A medical examination system, particularly a magnetic resonance system, has a host computer unit, a control computer unit and an image computer unit. The control computer unit is realized in the...
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