Nmr Logging Principles And Applications
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NMR Logging Principles and Applications
Author: George R. Coates
language: en
Publisher: Gulf Professional Publishing
Release Date: 1999
OF NMR LOGGING APPLICATIONS AND BENEFITS: Medical MRI -- MRI Logging -- Comparison of the MRIL Tool to other logging tools -- NMR logging raw data -- NMR porosity -- NMR T2 distribution -- NMR free fluid index and bulk volume irreducible -- NMR permeability -- NMR properties of reservoir fluids -- NMR hydrocarbon typing -- NMR enhanced water saturation with resistivity data -- MRIL application examples -- MRIL acquisition data sets -- MRIL response in rugose holes -- NMR logging applications summary -- NMR PHYSICS: Nuclear magnetism -- Polarization -- Pulse tipping and free induction decay -- Spin echo detection -- NMR measurement timing -- FUNDAMENTALS OF NMR PETROPHYSICS: NMR relaxation mechanisms of fluids in rock pores -- Multi exponential decay -- Echo fit for T2 distribution -- Pore size distribution -- Determination of BVI -- MRIL permeability model -- MRIL porosity model -- FUNDAMENTALS OF NMR HYDROCARBON TYPING: NMR properties of hydrocarbons -- NMR hydrocarbon typing -- Oil effects on T2 distributions -- Gas effects on T2 distribution under different conditions -- MRIL TOOL PRINCIPLES: Polarization -- Magnetization tipping and spin echo detection -- Logging speed and vertical resolution -- Depth of investigation -- Multi frequency measurement and RF pulse bandwidth -- Ringing effect -- Signal to noise ratio and running average -- Activations -- Tool configuration
Nuclear Magnetic Resonance
The applications of nuclear magnetic resonance (NMR) to petroleum exploration and production have become more and more important in recent years. The development of the NMR logging technology and the NMR applications to core analysis and formation evaluation have been very rapid and extensive.The scope of this book covers a wide range of NMR related petrophysical measurements on cores including brief descriptions of recent applications of Magic Angle Spinning (MAS) NMR and the basics of NMR imaging of cores. In the discussion of NMR logging applications various schemes of using NMR logs to obtain necessary information for formation evaluation are outlined, such as irreducible water saturation determination, hydrocarbon typing, oil viscosity estimation, and permeability prediction. The principles of these applications are discussed using schematic diagrams for illustration.A unique aspect of the book is that it provides a detailed account of the basic principles of spin diffusion and relaxation in porous media. Another important area that is covered is the inversion of NMR data into a distribution of amplitudes associated with relaxation time which provides the basic information needed to interpret the NMR measurements obtained from logging.
Practical NMR for Oil and Gas Exploration
Author: Lizhi Xiao
language: en
Publisher: Royal Society of Chemistry
Release Date: 2023-08-14
Describing comprehensively the development and applications of NMR to oil and gas exploration, this book will bring the literature up to date as it has developed very quickly in the last two decades. Outlining new methodologies, it will provide a thorough and comprehensive document enabling a better understanding of the basics of NMR physics, petrophysics, downhole tools and data interpretation. Written by an author with more than 30 years’ experience in this hot and important topic, this book is designed to meet the needs of the community and encourage applications in low field NMR.