scholarly journals About the possibility of identification of hydrocarbon deposits with the help of NMR

2016 ◽  
Vol 5 (2) ◽  
pp. 551-559
Author(s):  
Pavlo M. Ivashchenko ◽  
Eduard A. Bakai ◽  
Alexander I. Yurchuk
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Absorption Spectra ◽  
Weak Magnetic Field ◽  
Directional Antennas ◽  
Practical Implementation ◽  
Practical Application ◽  
The Earth ◽  
Hydrocarbon Deposits

Abstract. The main purpose of this article is to review the theoretical prerequisites of nuclear magnetic resonance (NMR) application in tasks of search and exploration of hydrocarbon deposits. The identification peculiarities of hydrocarbon deposits in a weak magnetic field of the Earth were analysed. The necessity of using highly directional antennas for providing greater sounding depths as well as the use of absorption spectra of the sought-for minerals as sounding signals were identified and justified. A variant of practical implementation of such a system was examined and examples of practical application of the innovative NMR technology were provided.

scholarly journals About the Possibility of Identification of Hydrocarbon Deposits with the Help of NMR

2016 ◽  
Author(s):  
Pavlo Ivashchenko ◽  
Eduard Bakai ◽  
Alexander Yurchuk
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Absorption Spectra ◽  
Weak Magnetic Field ◽  
Directional Antennas ◽  
Practical Implementation ◽  
Practical Application ◽  
The Earth ◽  
Hydrocarbon Deposits

Abstract. The main purpose of this article is to review the theoretical prerequisites of nuclear magnetic resonance (NMR) application in tasks of search and exploration of hydrocarbon deposits. The identification peculiarities of hydrocarbon deposits in a weak magnetic field of the Earth were analyzed. The necessity of using highly directional antennas for providing greater sounding depths as well as the use of absorption spectra of the sought-for minerals as sounding signals were identified and justified. A variant of practical implementation of such a system was examined and examples of practical application of the innovative NMR technology were provided.

scholarly journals Особенности регистрации спектра ядерного магнитного резонанса конденсированной среды при экспресс-контроле ее состояния

2020 ◽  
Vol 128 (10) ◽  
pp. 1554
Author(s):  
В.В. Давыдов ◽  
А.В. Мороз ◽  
Н.С. Мязин ◽  
С.С. Макеев ◽  
В.И. Дудкин
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Weak Magnetic Field ◽  
Experimental Studies ◽  
Condensed Medium ◽  
Weak Field ◽  
Nmr Spectrum ◽  
Nuclear Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The necessity of recording the spectrum of nuclear magnetic resonance in a weak field from a condensed medium during express control of its state is substantiated. The conditions are established that allow realizing the registration of nuclear magnetic resonance spectra in a weak field. A new design of a small-sized nuclear magnetic spectrometer has been developed for recording the NMR spectrum in a weak magnetic field from the volume of the condensed medium of the order of 3.0 ml. The results of experimental studies of various environments are presented.

scholarly journals О возможности использования спектрального анализа для исследования структуры линии сигнала ядерного магнитного резонанса

2021 ◽  
Vol 129 (5) ◽  
pp. 608
Author(s):  
В.В. Давыдов ◽  
В.Д. Купцов ◽  
В.И. Дудкин ◽  
А.В. Мороз ◽  
С.С. Макеев
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Weak Magnetic Field ◽  
Experimental Studies ◽  
Condensed Medium ◽  
Weak Field ◽  
Nmr Spectrum ◽  
Nuclear Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The necessity of recording the spectrum of nuclear magnetic resonance in a weak field from a condensed medium with express control of its state is substantiated. The conditions are established that allow the registration of nuclear magnetic resonance spectra in a weak field. A new design of a small-sized nuclear magnetic spectrometer for recording the NMR spectrum in a weak magnetic field from a volume of a condensed medium of about 3.0 ml has been developed. The results of experimental studies of various media are presented.

Nuclear magnetic resonance microscopy

1989 ◽  
Vol 47 ◽  
pp. 828-829
Author(s):  
Paul C. Lauterbur
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Magnetic Fields ◽  
Signal To Noise ◽  
Field Gradients ◽  
Useful Signal ◽  
Magnetic Field Gradients ◽  
Observation Times ◽  
Nuclear Magnetic

Nuclear magnetic resonance imaging can reach microscopic resolution, as was noted many years ago, but the first serious attempt to explore the limits of the possibilities was made by Hedges. Resolution is ultimately limited under most circumstances by the signal-to-noise ratio, which is greater for small radio receiver coils, high magnetic fields and long observation times. The strongest signals in biological applications are obtained from water protons; for the usual magnetic fields used in NMR experiments (2-14 tesla), receiver coils of one to several millimeters in diameter, and observation times of a number of minutes, the volume resolution will be limited to a few hundred or thousand cubic micrometers. The proportions of voxels may be freely chosen within wide limits by varying the details of the imaging procedure. For isotropic resolution, therefore, objects of the order of (10μm) may be distinguished.Because the spatial coordinates are encoded by magnetic field gradients, the NMR resonance frequency differences, which determine the potential spatial resolution, may be made very large. As noted above, however, the corresponding volumes may become too small to give useful signal-to-noise ratios. In the presence of magnetic field gradients there will also be a loss of signal strength and resolution because molecular diffusion causes the coherence of the NMR signal to decay more rapidly than it otherwise would. This phenomenon is especially important in microscopic imaging.

Design of Braunbeck Coil for Nuclear Magnetic Resonance Gyro Magnetic Field Excitation

2018 ◽  
Vol 23 (6) ◽  
pp. 740-745
Author(s):  
Pei Wang ◽  
Hua Liu ◽  
Xiang Cheng ◽  
Wanliang Zhao ◽  
Shaoliang Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Field Excitation ◽  
Nuclear Magnetic

scholarly journals The development of the magnetic system of sensor for PMR-analyser

2020 ◽  
Vol 22 (4) ◽  
pp. 115-122
Author(s):  
A. Y. Svinin ◽  
R. S. Каshaev ◽  
O. V. Коzelkov
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Magnetic System ◽  
Scientific Paper ◽  
Magnetic Sensors ◽  
Measuring Instruments ◽  
Main Task ◽  
Magnetic Field Homogeneity ◽  
Nuclear Magnetic

The enhancement of the measuring instruments accuracy has always been the most crucial task for engineers and scientists. In particular, in the field of nuclear magnetic resonance, the creation of uniform magnetic field often defines the results of measurements, therefore the main task of this study is to develop Halbach magnet array based on design characteristics of developing NMR-analyzer. The research describes the development process of the main sensor’s magnetic system components for continuous-flow portable NMR-analyzer. The scientific paper makes a different variations analysis of Halbach magnet arrays on the degree of the magnetic field homogeneity, shows the process of development and production of the 3D-framework for Halbach magnet array for NMR-analyzer. The article also gives information on the design of quartz generator based on Pierce oscillator circuit for receiver-transmitter coil of the NMR-analyzer’s sensor. The results could be useful for the magnetic sensors design with high degree of homogeneity, measuring instruments and devices using the method of nuclear magnetic resonance in its foundation.

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