Patent application number | Description | Published |
20090128144 | High Pressure/High Temperature Magnetic Resonance Tool - The present invention pertains to an apparatus and method for conducting magnetic resonance measurements on fluids at high pressures and/or high temperatures. The apparatus can be used in conjunction with or as part of a downhole fluid sampling tool to perform NMR measurements on fluids withdrawn from petroleum reservoirs, or can also be used for laboratory measurements on live reservoir fluids. The apparatus can perform all of the measurements made by modern NMR logging tools, including multi-dimensional distribution functions of spin-spin (T | 05-21-2009 |
20090219019 | DOWNHOLE MICRO MAGNETIC RESONANCE ANALYZER - A downhole micro MR analyzer for use in a wellbore, having a micro sample tube, a micro RF coil in close proximity to the micro sample tube, and one or more magnets disposed about the micro sample tube is disclosed. The micro MR analyzer can be used for nuclear magnetic resonance or electron spin resonance experiments to ascertain formation properties and chemical compositions. | 09-03-2009 |
20100271019 | PREDICTING PROPERTIES OF LIVE OILS FROM NMR MEASUREMENTS - A fluid property of live crude oil removed from an earth formation is determined using nuclear magnetic resonance (NMR) measurements. A pressure cell, located on or near the earth's surface, and in which the live crude oil is disposed, is provided. An NMR tool capable of making NMR measurements on the live crude oil is provided, as is a database linking existing NMR data and the fluid property. A mapping function is created from a combination of radial basis functions and parameters of the mapping function are derived using the database. NMR data are acquired on the live crude oil using the NMR tool, and the fluid property is estimated from the acquired NMR data using the mapping function. | 10-28-2010 |
20100277165 | METHOD FOR DETERMINING WETTABILITY OF AN OIL RESERVOIR - A method for determining wettability of an earth formation zone surrounding a borehole, including the following steps: introducing paramagnetic ions into the water component of the zone; performing NMR measurements on the zone, and determining an NMR relaxation time parameter for the zone; extracting a fluid sample from the zone; performing NMR measurements on the sample, and determining the NMR relaxation time parameter for the sample; and determining wettability of the earth formation zone using the determined relaxation time parameter for the zone and the determined relaxation time parameter for the sample. | 11-04-2010 |
20100313633 | ESTIMATING EFFECTIVE PERMEABILITIES - A method for determining effective permeabilities of earth formations. The method includes receiving a database having one or more measurements made on a collection of fluid filled rocks and dividing the measurements into input measurements and output measurements. The input measurements include one or more measured properties of the fluid filled rocks and the output measurements include the corresponding effective permeabilities of the fluid filled rocks. The method then includes constructing a mapping function using the input measurements and the output measurements. The mapping function may then be used to predict the effective permeabilities of one or more rocks that are not part of the collection of fluid filled rocks. As such, the method may then include receiving one or more input measurements made on one or more rocks that are not part of the collection of fluid filled rocks and predicting the effective permeabilities of the rocks using the mapping function and the input measurements made on the rocks. | 12-16-2010 |
20110068787 | MEASUREMENTS IN NON-INVADED FORMATIONS - The present invention relates to making one or more measurements in a virgin formation using a downhole tool that includes a miniature logging tool. The downhole tool is disposed in a wellbore penetrating the formation, adjacent to the formation, and a sidetrack borehole is made into the formation. All or a portion of the miniature logging tool is deployed into the sidetrack borehole and measurements are made in the virgin formation using the miniature logging tool. The downhole tool may include a drilling/coring module, a pump module, and packers. The drilling/coring module is used to make the sidetrack borehole, and the packers and pump module can be used to create an underbalanced drilling condition in an isolated section of the wellbore. | 03-24-2011 |
20110227570 | DETERMINING THE LARMOR FREQUENCY FOR NMR TOOLS - The Larmor frequency for an in situ nuclear magnetic resonance (NMR) tool is determined and used to acquire NMR data. An NMR tool is provided and placed in situ, for example, in a wellbore. An initial estimate of the Larmor frequency for the in situ NMR tool is made and NMR data are acquired using the in situ NMR tool. A spectral analysis is performed on the NMR data, or optionally, the NMR data are digitized and a discrete Fourier transform (DFT) is performed on the digitized NMR data. The modal frequency of the spectral analysis or DFT is determined, and the Larmor frequency for the in situ NMR tool is determined using the modal frequency. The NMR tool is modified to transmit at the determined Larmor frequency and then used to acquire further NMR data. | 09-22-2011 |
20130204534 | Method Of Estimating A Subterranean Formation Property - A method of analyzing a subterranean formation may include collecting a plurality of tool responses from different tools and generating a respective theoretical equation relating tool responses for each of the tools to properties of the subterranean formation. The method may also include generating a database having the tool responses stored therein based upon each respective theoretical equation and generating a non-linear mapping function relating at least one of the tool responses to at least one property of the subterranean formation. The method may also include estimating a value for the at least one property based upon the non-linear mapping function. | 08-08-2013 |
20130319659 | Open-Hole Logging Instrument And Method For Making Ultra-Deep Magnetic And Resistivity Measurements - Methods and systems are provided for obtaining both magnetic and apparent resistivity ultra-deep reading electromagnetic measurements at the same time and/or by a single tool. The system can include a magnetometer, a current source electrode, a pair of voltage measuring electrodes, and a current return electrode. Using such a system can enable a lowering a tool into a relief well and obtaining both magnetic and apparent resistivity ultra-deep reading electromagnetic measurements in a single trip in order to provide a more accurate and faster determination of the distance and direction to a cased blown out well in order to shorten the time required to intersect and kill the blown out well. | 12-05-2013 |
20140005945 | Method For Estimation Of Borehole And Formation Properties From Nuclear Logging Measurements | 01-02-2014 |
20140152301 | Determining the Larmor Frequency for NMR Tools - The Larmor frequency for an in situ nuclear magnetic resonance (NMR) tool is determined and used to acquire NMR data. An NMR tool is provided and placed in situ, for example, in a wellbore. An initial estimate of the Larmor frequency for the in situ NMR tool is made and NMR data are acquired using the in situ NMR tool. A spectral analysis is performed on the NMR data, or optionally, the NMR data are digitized and a discrete Fourier transform (DFT) is performed on the digitized NMR data. The modal frequency of the spectral analysis or DFT is determined, and the Larmor frequency for the in situ NMR tool is determined using the modal frequency. The NMR tool is modified to transmit at the determined Larmor frequency and then used to acquire further NMR data. | 06-05-2014 |
20140214324 | Predicting Mineralogy Properties From Elemental Compositions - A method for predicting at least one property of a geological formation may include generating mapping function values relating a plurality of reference elemental compositions to corresponding reference properties thereof based upon at least one non-linear mapping function. The method may further include determining a sample elemental composition of at least one sample associated with the geological formation and performing, using a processor, an interpolation to map the sample elemental composition to at least one sample property based upon the mapping function values and the at least one non-linear function. | 07-31-2014 |
20140253116 | SYSTEM AND METHOD FOR OBTAINING NUCLEAR MAGNETIC RESONANCE MEASUREMENTS ON RESERVOIR FLUIDS FOR PREDICTION OF FLUID PROPERTIES - A nuclear magnetic resonance (NMR) measurement system for high pressure and temperature measurements on fluids is disclosed. The system has a sensor assembly that includes a sample holder having a body formed from a non-magnetic metal and defining an interior cavity for receiving a fluid sample, a frame member disposed in the interior cavity of the sample holder, an antenna coil disposed in the interior cavity about the frame member, an inlet that allows the fluid sample to enter the interior cavity, an outlet that allows for the fluid sample to be flushed from the interior cavity, and a magnet assembly having a central bore in which the sample holder is disposed. Adjacent to the sample holder are pulsed field gradient coils for performing diffusion measurements. The system further includes pulse sequencer circuitry that supplies signals to the antenna coil. When the interior cavity of the sample holder is filled with the fluid sample, the antenna coil and the frame member are at least partially submerged in the fluid sample, and the antenna coil obtains NMR measurements of the fluid sample in response to the signals. Related methods and apparatuses are also disclosed herein. | 09-11-2014 |