Induction logging
著者
書誌事項
Induction logging
（Methods in geochemistry and geophysics, 27）
Elsevier, 1989
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注記
Articles translated from various monographs and Russian language journals
Includes index
Bibliography: p. [599]-600
内容説明・目次
内容説明
Induction well logging is a method for measuring the electrical conductivity of the rock around a borehole, with this information in turn being used to estimate the content of oil or gas in the rock. Since the development of induction well logging in the late 1940s, it has become the standard method used, primarily because of its simplicity of design. Now, 40 years later, and with the availability of new technology both in tool construction and in mathematical analysis, this book examines our understanding of induction logging in mathematical detail, and suggests how to develop more useful applications. The first part of the book reviews the theoretical basis of the electromagnetic methods for determining earth conductivity. All such methods are based fundamentally on Maxwell's equations. In practice, however, induction well logging is based on end-state behaviour for electromagnetic fields at low frequencies. Thus, the wave equation is developed for the extreme, low frequency condition, which produces many specific algebraic results of use in equipment design.
目次
Introduction. List of Symbols. 1. Basic Electromagnetic Laws and Maxwell's Equations. 2. Electromagnetic Field of the Magnetic Dipole in a Uniform Conducting Medium. 3. Methods for the Solution of Direct Problems of Inducting Logging. 4. Electromagnetic Field of a Vertical Magnetic Dipole on the Axis of a Borehole. 5. Quasistationary Magnetic Field of a Vertical Magnetic Dipole in a Formation with a Finite Thickness. 6. The Two-Coil Induction Probe of the Borehole Axis, When the Bed has a Finite Thickness. 7. Multi-Coil Differential Induction Probes. 8. Induction Logging Based on Measuring the Inphase Component of the Secondary Field or the Quadrature Component Difference of Type QH z (w 1 ) - w 1 /w 2 QH z (w 2 ). 9. Transient Induction Logging. 10. Principles of Induction Logging with Transversal Induction Coils. 11. The Influence of Anisotropy on the Field of the Magnetic Dipole in a Conducting Medium. Bibliography.
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