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US20130113480 MULTIPHYSICS NMR LOGGING TECHNIQUES FOR THE DETERMINATION OF IN SITU TOTAL GAS IN GAS RESERVOIRS  
Methods for the determination of the Total Gas in Place (TGiP) in gas-bearing formations are provided. Aspects of the subject disclosure also relate to the determination of the TGiP from nuclear...
US20130265043 T2CUTOFF DETERMINATION USING MAGNETIC SUSCEPTIBILITY MEASUREMENTS  
Systems and methods for determining T2 cutoff are described. T2 cutoff can be derived from magnetic susceptibility measurements. By providing a depth curve of T2cutoff, improved permeability...
US20130187648 ESTIMATING AND DISPLAYING MOLECULAR SIZE INFORMATION OF A SUBSTANCE  
Estimating and displaying information about the size of molecules within a substance from nuclear magnetic resonance (NMR) maps and/or logs. Methods include utilizing a relationship between the...
US20140132258 ASPHALTENE EVALUATION BASED ON NMR MEASUREMENTS AND TEMPERATURE / PRESSURE CYCLING  
Asphaltene content and its spatial distribution in a reservoir containing crude oil is an important factor in determining the potential for formation damage and pipeline impairment, as well as...
US20130113479 METHOD FOR CORRECTING NMR AND NUCLEAR LOGS IN FORMATE MUD FILTRATE INVADED FORMATONS  
A method of calculating a porosity of a geological formation includes determining a bulk pore volume and a movable fluid pore volume in the geological formation in which drilling mud including a...
US20130257424 MAGNETIC RESONANCE ROCK ANALYSIS  
Processing is described for magnetic resonance measurements of granular material in the reciprocal Fourier domain to determine grain size distribution and/or pore size distribution in the granular...
US20110175607 NMR LOGGING OF MISCIBLE DISPLACEMENT  
NMR logging in a wellbore is used to monitor an oil reservoir during oil recovery by miscible displacement. Diffusivity distributions found by NMR logging indicate whether one or two phases are...
US20150054503 NUCLEAR MAGNETIC RESONANCE LOGGING TOOL HAVING MULTIPLE PAD-MOUNTED ATOMIC MAGNETOMETERS  
Various disclosed nuclear magnetic resonance (NMR) logging systems and methods employ a plurality of NMR sensors, including atomic magnetometers, mounted on pads. Certain method embodiments...
US20140035574 SYSTEM AND METHOD FOR ESTIMATING A NUCLEAR MAGNETIC RESONANCE RELAXATION TIME CUTOFF  
A nuclear magnetic resonance relaxation time cutoff between results for a bound-water index of rock and a free-fluid index of the rock is determined. The determination is made based on measured...
US20100225313 ATOMIC MAGNETOMETERS FOR USE IN THE OIL SERVICE INDUSTRY  
An apparatus for obtaining information from a subterranean environment, the apparatus includes: an atomic magnetometer configured to measure a magnetic field related to the information. An...
US20120199397 System and Method for Determining Pressure Transition Zones  
A method and apparatus for estimating a pressure transition zone in a borehole is disclosed. A parameter indicative of formation fluid pressure at a plurality of borehole depths is measured. A...
US20130106413 System and Method for Measuring Borehole Geometry While Drilling  
A method and system for determining a geometry of a borehole includes forming an nuclear magnetic resonance (NMR) caliper with a plurality of coils and coupling the NMR caliper to a borehole...
US20150061665 Azimuthally-Selective Downhole Nuclear Magnetic Resonance (NMR) Tool  
In some aspects, a downhole nuclear magnetic resonance (NMR) tool includes a magnet assembly and an antenna assembly. The NMR tool can operate in a wellbore in a subterranean region to obtain NMR...
US20150212225 Ultra-Slim Nuclear Magnetic Resonance Tool for Oil Well Logging  
NMR properties of earth formations are determined using a logging device movable in a borehole. The logging device includes a magnet assembly to generate a static magnetic field and an antenna...
US20130193964 METHOD FOR DETECTING OIL AND GAS FROM THE SURFACE BY NUCLEAR MAGNETIC RESONANCE IMAGING  
A process using Nuclear Magnetic Resonance (NMR) with pre-determined oil specimens at the earth's surface by which to match the location and lateral boundaries of any and every producible oil...
US20150212227 Downhole Differentiation of Light Oil and Oil-Based Filtrates by NMR with Oleophilic Nanoparticles  
Downhole nuclear magnetic resonance (NMR) methods that utilize oleophilic nanoparticle may allow for differentiation of light oil and oil-based filtrates. For example, a method may involve...
US20150145512 Downhole Differentiation of Light Oil and Oil-Based Filtrates by NMR with Oleophilic Nanoparticles  
Downhole nuclear magnetic resonance (NMR) methods that utilize oleophilic nanoparticle may allow for differentiation of light oil and oil-based filtrates. For example, a method may involve...
US20150035529 Nuclear Magnetic Resonance Tool With External Magnets  
Methods and systems are provided that enable logging while drilling NMR measurements to be made with magnets placed outside of the drill collar and magnetically permeable members to control the...
US20140009148 NMR MEASUREMENT OF ENGINEERED FLOW MANAGEMENT STRUCTURES  
Nuclear Magnetic Resonance (NMR) measurement apparatus, NMR sensors, NMR measurement methods are disclosed to determine NMR properties of engineered flow management structures, and to estimate...
US20110068788 ESTIMATING POROSITY AND FLUID VOLUME  
The present disclosure relates to a method to estimate a subsurface formation property. A downhole logging tool is provided and disposed in a wellbore. Multiple measurements of various measurement...
US20120049844 METHODS AND SYSTEMS FOR MEASURING NMR CHARACTERISTICS IN PRODUCTION LOGGING  
Methods and systems for measuring nuclear magnetic resonance characteristics of formation fluid utilizing micro-NMR sensors are provided. The micro-NMR sensors can be used to analyze fluid flowing...
US20110298457 DOWNHOLE ORIENTATION SENSING WITH NUCLEAR SPIN GYROSCOPE  
Downhole orientation sensing with a nuclear spin gyroscope. A downhole orientation sensing system for use in conjunction with a subterranean well can include a downhole instrument assembly...
US20150115954 NON-RESONANT MAGNETIC RESONANCE TRANSMITTER WITH POWER FACTOR CORRECTION  
A non-resonant transmitter for a magnetic resonance (MR) system, such as a nuclear magnetic resonance (NMR) system, is described herein. The transmitter includes a coil for applying NMR pulse...
US20090121711 THERMALLY STABILIZED MAGNETS FOR USE DOWNHOLE  
A logging instrument for estimating a property of a formation penetrated by a borehole, the instrument having a magnet disposed at least one of at and in the instrument wherein the magnet exhibits...
US20120239300 MAXIMUM DEPTH OF INVESTIGATION OF MEASUREMENTS IN A FORMATION  
The present disclosure relates to a method to determine a volume of clearance surrounding a wellbore. A logging tool is provided. The logging tool may be disposed on a wireline, a drill string, or...
US20140117984 ROTATIONAL INDEXING TO OPTIMIZE SENSING VOLUME OF A NUCLEAR MAGNETIC RESONANCE LOGGING TOOL  
A nuclear magnetic resonance (NMR) logging tool assembly method that employs rotational indexing to optimize the sensing volume. At least some embodiments include establishing an initial...
US20150061664 Downhole Nuclear Magnetic Resonance (NMR) Tool with Transversal-Dipole Antenna Configuration  
In some aspects, a downhole nuclear magnetic resonance (NMR) tool includes a magnet assembly and an antenna assembly. The NMR tool can operate in a wellbore in a subterranean region to obtain NMR...
US20140132259 NMR METHOD TO DETERMINE GRAIN SIZE DISTRIBUTION IN MIXED SATURATION  
A method for determining particle size distribution of a subsurface rock formation having pore spaced filled with at least two different fluids using measurements of at least one nuclear magnetic...
US20120035851 NMR-DNA FINGERPRINT  
Pulse sequences are applied to a fluid in an earth formation in a static magnetic field and NMR spin echo signals are obtained. The signals are processed to give a distribution of relaxation time...
US20110068787 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...
US20100315081 METHOD FOR DETERMINING FORMATION PARTICLE SIZE DISTRIBUTION USING WELL LOGGING MEASUREMENTS  
A method for determining particle size distribution of a subsurface rock formation using measurements of at least one nuclear magnetic resonance property made from within a wellbore penetrating...
US20110181278 NMR CONTRAST LOGGING  
An apparatus for estimating a property of an earth formation penetrated by a borehole, the apparatus includes: a carrier configured to be conveyed through the borehole; a nuclear magnetic...
US20100271019 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...
US20100313633 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...
US20090072824 Nuclear magnetic resonance evaluation using independent component analysis (ICA)-based blind source separation  
Disclosed is a non-lineal statistical independent component (ICA) analysis methodology for calculating T2 or T1 distributions of nuclear magnetic resonance logs. In one aspect, the invention...
US20150145513 HYBRID SATURATION RECOVERY-INVERSION RECOVERY PULSE SEQUENCE FOR IMPROVED NMR LOGGING OF BOREHOLES  
A nuclear magnetic resonance (NMR) logging method includes providing a hybrid pulse sequence having a saturation pulse, an inversion pulse, and a detection sequence. The method also includes...
US20120126809 Nuclear Magnetic Resonance Tool With Movable Magnets  
Methods and systems are provided that enable logging while drilling NMR measurements to be made with a tool having magnets with positions adjustable or movable relative to each other. Such...
US20090248311 DETERMINATION OF IRREDUCIBLE WATER CUT-OFF USING TWO DIMENSIONAL NUCLEAR MAGNETIC RESONANCE DATA  
A method for estimating a distribution of pore sizes of a fluid filled rock formation penetrated by a borehole, the method including: processing nuclear magnetic resonance (NMR) data to determine...
US20090125239 Rock and Fluid Properties Prediction From Downhole Measurements Using Linear and Nonlinear Regression  
Measurements of fluorescence spectra of fluid samples recovered downhole are processed to give the fluid composition. The processing may include a principal component analysis followed by a...
US20090206834 METHOD FOR ESTIMATING FORMATION HYDROCARBON SATURATION USING NUCLEAR MAGNETIC RESONANCE MEASUREMENTS  
A method for estimating fluid saturation in a formation penetrated by a wellbore from nuclear magnetic resonance measurements made at a plurality of lateral depths into the formation from the...
US20130261973 Carbonate Permeability by Pore Typing  
A method for estimating a property of an earth formation includes: conveying a carrier through a borehole penetrating the earth formation; performing nuclear magnetic resonance (NMR) measurements...
US20130162247 REFOCUSING PULSES AND EXCITATION PULSES FOR NMR LOGGING  
Illustrative embodiments are directed to applying a nuclear magnetic resonance sequence to a substance within an inhomogeneous static magnetic field. Various embodiments include applying a series...
US20130200890 KEROGEN POROSITY VOLUME AND PORE SIZE DISTRIBUTION USING NMR  
Method and apparatus for estimating a kerogen (organic) porosity of an earth formation. The method may include using at least one processor to estimate a kerogen porosity using NMR signals...
US20140232391 ROTATING FRAME PULSED NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY  
An NMR method and apparatus for analyzing a sample of interest applies a static magnetic field together with RF pulses of oscillating magnetic field across a sample volume that encompasses the...
US20130271127 Distinguishing Mud Filtrate From Formation Water By Multi-DOI NMR  
A nuclear magnetic resonance (NMR) measurement, at two or more depths of investigation, of a subsurface formation containing formation water and a mud filtrate from a water-base mud is obtained,...
US20100264915 FORMATION TESTING AND EVALUATION USING LOCALIZED INJECTION  
Evaluating a formation by lowering a downhole tool in a wellbore penetrating the formation, injecting a fluid into the formation at an injection zone via the downhole tool, and using a formation...
US20100201358 ACOUSTIC MODIFIED NMR (AMNMR)  
Many reservoirs of interest include heavy oil. In such reservoirs, NMR measurements have difficulty distinguishing between heavy oil and water in the formation. An acoustic signal is used to...
US20140084915 NMR LOGGING APPARATUS  
Technologies including NMR logging apparatus and methods are disclosed. Example NMR logging apparatus may include surface instrumentation and one or more downhole probes configured to fit within...
US20130187647 NMR LOGGING APPARATUS  
Technologies including NMR logging apparatus and methods are disclosed. Example NMR logging apparatus may include surface instrumentation and one or more downhole probes configured to fit within...
US20130057277 Method for Determining Rock Formation Fluid Interaction Properties Using Nuclear Magnetic Resonance Well Logging Measurements  
A method for determining surface relaxivity of a rock formation in a wellbore includes using measurements of nuclear magnetic resonance properties of the rock formation made from within a wellbore...

Matches 1 - 50 out of 207 1 2 3 4 5 >