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Wave Propagation in Drilling, Well Logging and Reservoir - download pdf or read online

By Wilson C. Chin

ISBN-10: 1118925890

ISBN-13: 9781118925898

Wave propagation is significant to all parts of petroleum engineering, e.g., drilling vibrations, MWD dust pulse telemetry, swab-surge, geophysical ray tracing, ocean and present interactions, electromagnetic wave and sonic purposes within the borehole, yet hardly ever taken care of carefully or defined in really medical phrases, even for a unmarried self-discipline. Wilson Chin, an MIT and Caltech knowledgeable scientist who has consulted across the world, presents an built-in, complete, but readable exposition masking the entire mentioned issues, supplying insights, algorithms and proven tools by no means prior to published.  A must on each petroleum engineering bookshelf!  specifically, the publication –

  • Delivers drillstring vibrations versions coupling axial, torsional and lateral motions that are expecting rate-of-penetration, bit jump and stick-slip as they depend upon rock-bit interplay and bottomhole meeting properties,
  • Explains why catastrophic lateral vibrations on the impartial aspect can't be saw from the outside even in vertical wells, yet offering a confirmed option to steer clear of them,
  • Demonstrates why Fermat’s “principle of least time” (used in geophysics) applies to non-dissipative media simply, yet utilizing the “kinematic wave idea” built at MIT, derives robust equipment appropriate to normal attenuative inhomogeneous media,
  • Develops new techniques to dust acoustics and making use of them to MWD telemetry modeling and robust transients in glossy swab-surge applicagtions,
  • Derives new algorithms for borehole geophysics interpretation, e.g., Rh and Rv in electromagnetic wave and permeability in Stoneley waveform research, and
  • Outlines many extra purposes, e.g., wave loadings on offshore systems, classical difficulties in wave propagation, and extensions to fashionable kinematic wave theory.

These disciplines, very important to all field-oriented actions, are not taken care of as finite aspect purposes which are easily gridded, “number-crunched” and displayed, yet as medical disciplines deserving of transparent explanation.  common effects are rigorously inspired, derived and utilized to real-world difficulties, with effects demonstrating the significance and predictive features of the recent methods.

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Additional resources for Wave Propagation in Drilling, Well Logging and Reservoir Applications

Example text

If the consequences l u/ t + of a model do not agree with experiment, another is proposed and its consequences studied. This approach can be tedious, since the simplest equations often elude convenient solution. 20 Wave Propagation “Kinematic wave theory,” which deals with propagating waves, provides an important and powerful alternative to physical modeling. The dispersion functions r(k,x,t) and i(k,x,t) are often available experimentally; for example, they may be derived from wave speed and attenuation data.

We take the opportunity to introduce the mathematical and engineering terminology used in solving vibration problems. Our examples are defined on the finite domain 0 < x < L. 1 Example 1-3. String with pinned ends and general initial conditions. 1, which does not include damping and external excitation. In particular, we solve 2u/ t2 - c2 2u/ x2 = 0 for the dependent variable u(x,t) subject to the boundary conditions u(0,t) = 0 and u(L,t) = 0, plus general initial conditions u(x,0) = (x) and ut(x,0) = (x).

63, the g(ct+x) term represents the known, prescribed incident wave emerging from infinity, whereas the term -g(ct-x) represents the reflection at a rigid pinned connection (this is so because the sum g(ct+x) - g(ct-x) vanishes at x = 0). The last term is the “shape distortion” to the incoming wave due to the flexible support; this consists of a phase shift and a shape change. 1 Example 1-10a. Rectangular pulse. 3b shows how a rectangular pulse is distorted at a pure elastic boundary (with M = = 0); its closed form solution is given by Graff (1975).

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Wave Propagation in Drilling, Well Logging and Reservoir Applications by Wilson C. Chin

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