Measurement while drilling (MWD) : signal analysis, optimization, and design

Measurement while drilling (MWD) : signal analysis, optimization, and design / Wilson C. Chin.

Trade magazines and review articles describe MWD in casual terms, e.g., positive versus negative pulsers, continuous wave systems, drilling channel noise and attenuation, in very simple terms absent of technical rigor. However, few truly scientific discussions are available on existing methods, let...

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Bibliographic Details
Main Author: Chin, Wilson C. (Author)
Format: eBook
Language:English
Published: Hoboken, NJ : Salem, MA : John Wiley & Sons, Inc. ; Scrivener Publishing, LLC, [2018]
Edition:2nd edition.
Subjects:
Oil well logging, Electric.
Oil well drilling.
Orientation > Measurement.
Wells > Fluid dynamics.
Flow meters.
flowmeters.
Flow meters
Oil well drilling
Oil well logging, Electric
Wells > Fluid dynamics
Online Access:Click for online access
Table of Contents:
  • Cover; Title Page; Copyright Page; Contents; Preface; Acknowledgements; 1 Stories from the Field, Fundamental Questions and Solutions; 1.1 Mysteries, Clues and Possibilities; 1.2 Paper No. AADE-11-NTCE
  • 74, ""High-Data-Rate MWD System for Very Deep Wells""
  • significantly expanded with additional photographs and detailed annotations; 1.2.1 Abstract; 1.2.2 Introduction; 1.2.3 MWD telemetry basics; 1.2.4 New telemetry approach; 1.2.5 New technology elements; 1.2.5.1 Downhole source and signal optimization; 1.2.5.2 Surface signal processing and noise removal.
  • 1.2.5.3 Pressure, torque and erosion computer modeling1.2.5.4 Wind tunnel analysis: studying new approaches; 1.2.5.5 Example test results; 1.2.6 Conclusions; 1.2.7 Acknowledgements; 1.2.8 Credits; 1.2.9 Paper references; 1.3 References; 2 Harmonic Analysis: Six-Segment Downhole Acoustic Waveguide; 2.1 MWD Fundamentals; 2.2 MWD Telemetry Concepts Re-examined; 2.2.1 Conventional pulser ideas explained; 2.2.2 Acoustics at higher data rates; 2.2.3 High-data-rate continuous wave telemetry; 2.2.4 Drillbit as a reflector; 2.2.5 Source modeling subtleties and errors.
  • 2.2.6 Flowloop and field test subtleties2.2.7 Wind tunnel testing comments; 2.3 Downhole Wave Propagation Subtleties; 2.3.1 Three distinct physical problems; 2.3.2 Downhole source problem; 2.4 Six-Segment Downhole Waveguide Model; 2.4.1 Nomenclature; 2.4.2 Mathematical formulation; 2.4.2.1 Dipole source, drill collar modeling; 2.4.2.2 Harmonic analysis; 2.4.2.3 Governing partial differential equations; 2.4.2.4 Matching conditions at impedance junctions; 2.4.2.5 Matrix formulation; 2.4.2.6 Matrix inversion; 2.4.2.7 Final data analysis; 2.5 An Example: Optimizing Pulser Signal Strength.
  • 2.5.1 Problem definition and results2.5.2 User interface; 2.5.3 Constructive interference at high frequencies; 2.6 Additional Engineering Conclusions; 2.7 References; 3 Harmonic Analysis: Elementary Pipe and Collar Models; 3.1 Constant area drillpipe wave models; 3.1.1 Case (a), infinite system, both directions; 3.1.2 Case (b), drillbit as a solid reflector; 3.1.3 Case (c), drillbit as open-ended reflector; 3.1.4 Case (d), ""finite-finite"" waveguide of length 2L; 3.1.5 Physical Interpretation; 3.2 Variable area collar-pipe wave models; 3.2.1 Mathematical formulation.
  • 3.2.2 Example calculations3.3 References; 4 Transient Constant Area Surface and Downhole Wave Models; Overview; 4.1 Method 4-1. Upgoing wave reflection at solid boundary, single transducer deconvolution using delay equation, no mud pump noise; 4.1.1 Physical problem; 4.1.2 Theory; 4.1.3 Run 1. Wide signal
  • low data rate; 4.1.4 Run 2. Narrow pulse width
  • high data rate; 4.1.5 Run 3. Phase-shift keying or PSK; 4.1.6 Runs 4 and 5. Phase-shift keying or PSK, very high data rate.

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