Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 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 formation with a plurality of pulse sequences of radio frequency energy, each... | 03/06/2012 |
| 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 calculating attribute values for units labeled by the expert. From these values... | 01/03/2012 |
| 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 systems may model response of the tool and use the modeled response as a... | 11/01/2011 |
| 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 capture interactions and inelastic interactions; deconvolving the spectra t... | 09/20/2011 |
| 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 source of neutron radiation and at least two detectors axially spaced... | 08/16/2011 |
| 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 calculated according to one or more properties at a plurality of spatial locat... | 10/19/2010 |
| 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 borehole, parameters relating to characteristics of the underground format... | 11/24/2009 |
| 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 in a manner indicative of a characteristic of the material, receivin... | 11/17/2009 |
| 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 analytic function based on a heuristic model is used to predict the m... | 09/29/2009 |
| 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 logging includes providing at least two frequenci... | 03/10/2009 |
| 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 the contamination of the early portion of the data by borehole and o... | 10/21/2008 |
| 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 shear impedances. A rock physics model is built to relate porosity, the... | 09/09/2008 |
| 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 utilize the inelastic spectrum measurement of the first element and th... | 04/29/2008 |
| 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 constant gas saturation, or to determine both gas saturation and gas pr... | 04/22/2008 |
| 7357196 | Method and system for predicting performance of a drilling system for a given formation A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specificat... | 04/15/2008 |
| 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 points from a Raman spectrum are determined to be baseline data points, a... | 02/26/2008 |
| 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 longitudinal direction of the apparatus. A neutron measurement device o... | 02/26/2008 |
| 7333585 | Radiation measurement device A radiation measurement device includes a radiation detector generating an analog signal containing pulse components, an A/D converter converting the analog signal into sampled data, an n-th power pulse discrimination unit calculating n-th power values of the sample... | 02/19/2008 |
| 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 properties of the well casing. The corrected density log is then combin... | 02/05/2008 |
| 7309857 | Gamma ray detectors having improved signal-to-noise ratio and related systems and methods for analyzing materials in an oil well A gamma ray detector assembly for placement in a logging tool in a borehole can include a first gamma ray detector elongated along an axis and having a void extending along the axis. A second gamma ray detector conforms to at least a portion of the void. The first a... | 12/18/2007 |
| 7301345 | While-drilling methodology for estimating formation pressure based upon streaming potential measurements Logging-while-drilling apparatus and methodologies for measuring streaming potential in an earth formation are provided. The apparatus and methodologies can be utilized to find information relevant to the drilling operations. In particular, since the streaming poten... | 11/27/2007 |
| 7294829 | Method and apparatus for an improved formation density indicator using pulsed neutron instruments A pulsed neutron source is used in a density logging tool with three or more detectors. This enables compensation for source variations and provides redundant measurements that are used to make borehole corrections and/or corrections for casing. ... | 11/13/2007 |
| 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 one or more cased hole calibration relationships that utilize differe... | 11/06/2007 |
| 7286937 | Estimating formation properties from downhole data Methods and systems for extracting formation properties from formation logging data is disclosed. A method includes obtaining a deconvolution filter; and processing the formation logging data using the deconvolution filter to produce estimates of the formation prope... | 10/23/2007 |
| 7261167 | Method and system for predicting performance of a drilling system for a given formation A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation is disclosed. The method generates a geology model of a given formation. The geology model includes a geology characteristic of the given ... | 08/28/2007 |
| 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 ray response in thin beds. ... | 08/07/2007 |
| 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 to the interaction of radiation from a suitable source on the instrume... | 08/07/2007 |
| 7253401 | Spectral gamma ray logging-while-drilling system A method for determining concentrations of naturally occurring radioactive elements in earth formation by analysis of gamma ray energy spectra measured by at least one gamma ray detector while the borehole is being drilled. Gain of the gamma ray detector is controll... | 08/07/2007 |
| 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 aircraft arrival fix times at the resource by a system manager, includes the... | 07/24/2007 |
| 7196517 | Combining NMR and density measurements for determining properties of reservoir fluid A method for evaluating formation fluids includes measuring a nuclear magnetic resonance property related to a total volume of the formation fluids, measuring a dielectric property related to an electromagnetic wave travel time, measuring a bulk density, and solving... | 03/27/2007 |
| 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 α-ray detector in a computer, obtaining time distribution of the i... | 03/20/2007 |
| 7180287 | Reduction of motion artifacts in NMR NMR spin echo signals, acquired on a MWD logging tool, are susceptible to errors magnetic flux density has a gradient and the magnet on the logging tool is moving relative to the earth. The errors can be corrected by having the excitation pulse cover a smaller or a ... | 02/20/2007 |
| 7157915 | Combined characterization and inversion of reservoir parameters from nuclear, NMR and resistivity measurements A method of determining the distribution of shales, sands and water in a reservoir including laminated shaly sands using vertical and horizontal conductivities derived from nuclear, NMR, and multi-component induction data such as from a Multicomponent Induction Logg... | 01/02/2007 |
| 7135862 | NMR logging using time-domain averaging Method for data acquisition and processing, which uses time-domain averaging to increase the signal to noise ratio (SNR) in single-event measurements. In a preferred embodiment, NMR echo-trains obtained using high-speed NMR logging are provided, the echo trains are ... | 11/14/2006 |
| 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 systems may model response of the tool and use the modeled response as a... | 10/03/2006 |
| 7102125 | Method of logging a borehole In the field of wellbore data logging it is known to use isotopic neutron sources in a neutron capture logging technique. However, continuous isotopic sources are unpopular for regulatory and safety reasons. Attempts to employ neutron generator tubes to gener... | 09/05/2006 |
| 7085696 | Iterative drilling simulation process for enhanced economic decision making An iterative drilling simulation method and system for enhanced economic decision making includes obtaining characteristics of a rock column in a formation to be drilled, specifying characteristics of at least one drilling rig system; and iteratively simulating the ... | 08/01/2006 |
| 7073378 | 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 longitudinal direction of the apparatus. A neutron measurement device o... | 07/11/2006 |
| 7069191 | Methods for reducing the susceptibility of a peak search to signal noise A method to minimize noise is used to analyze data generated from a measurement system such as a flow cytometer. One embodiment of a computer-implemented method includes determining sums of different subsets of sample values. The method also includes determining the... | 06/27/2006 |
| 7032689 | Method and system for predicting performance of a drilling system of a given formation A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specificat... | 04/25/2006 |
