Measurement while drilling : signal analysis, optimization and design

• Main Author: Chin, Wilson C. (Author)
• Format: Electronic eBook
• Language: English
• Published: Beverly, MA : Scrivener Publishing, 2018.
• Edition: 2nd edition.
• Subjects: Oil well logging, Electric.; Oil well drilling.; Orientation > Measurement.; Wells > Fluid dynamics.; Flow meters.; Electric logging.; elektronické knihy; electronic books
• ISBN: 9781119479307; 1119479304; 9781119479321; 1119479320; 9781119479369; 1119479363; 9781523123643; 1523123648; 9781119479154
• Physical Description: 1 online resource

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...

Table of Contents:

• AADE-11-NTCE
• 74, "High-Data-Rate MWD System for Very Deep Wells" significantly expanded with additional photographs and detailed annotations 11 1.2.1 Abstract 11 1.2.2 Introduction 11 1.2.3 MWD telemetry basics 13 1.2.4 New telemetry approach 14 1.2.5 New technology elements 16 1.2.5.1 Downhole source and signal optimization 16 1.2.5.2 Surface signal processing and noise removal 19 1.2.5.3 Pressure,
• "finite-finite" waveguide of length 2L 91 3.1.5 Physical Interpretation 91 3.2 Variable area collar-pipe wave models 94 3.2.1 Mathematical formulation 94 3.2.2 Example calculations 96 3.3 References 98 4 Transient Constant Area Surface and Downhole Wave Models 99 Overview 99 4.1 Method 4-1. Upgoing wave reflection at solid boundary, single transducer deconvolution using delay equation, no mud pump noise 101 4.1.1 Physical problem 101 4.1.2 Theory 102 4.1.3 Run 1. Wide signal
• low data rate 103 4.1.4 Run 2. Narrow pulse width
• high data rate 105 4.1.5 Run 3. Phase-shift keying or PSK 106 4.1.6 Runs 4 and 5. Phase-shift keying or PSK, very high data rate 109 4.2 Method 4-2.
• Upgoing wave reflection at solid boundary, single transducer deconvolution using delay equation, with mud pump noise 110 4.2.1 Physical problem 110 4.2.2 Software note 111 4.2.3 Theory 111 4.2.4 Run 1. 12 Hz PSK, plus pump noise with S/N = 0.25 112 4.2.5 Run 2. 24 Hz PSK, plus pump noise with S/N = 0.25 113 4.3 Method 4-3. Directional filtering
• difference equation method requiring two transducers 114 4.3.1 Physical problem 114 4.3.2 Theory 115 4.3.3 Run 1. Single narrow pulse, S/N = 1, approximately 116 4.3.4 Run 2. Very noisy environment 118 4.3.5 Run 3. Very, very noisy environment 119 4.3.6 Run 4. Very, very, very noisy environment 120 4.3.7 Run 5. Non-periodic background noise 121 4.4 Method 4-4. Directional filtering
• differential equation method requiring two transducers 122 4.4.1 Physical problem 122 4.4.2 Theory 123 4.4.3 Run 1.