Hybrid distributed acoustic testing

US10634553B1 · kind B1 · utility

Assignees

• SAUDI ARABIAN OIL COMPANY · SA
• King Abdullah University of Science and Technology · SA

Inventors

• Frode Hveding · Dhahran, SA
• Islam Ashry · Thuwal, SA
• Mao Yuan · Thuwal, SA
• Mohd Sharizal Bin Alias · Thuwal, SA
• Boon Siew Ooi · Thuwal, SA
• Muhammad Arsalan · Dhahran, SA

Key dates

• Filing date: Jan 30, 2019
• Grant date: Apr 28, 2020
• Expiry date: Jan 30, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2021/4709
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The subject matter of this specification can be embodied in, among other things, a method that includes separating, from a few mode optical fiber, a collection of backscattered Rayleigh signals based on a vibration of the few mode optical fiber at a vibration frequency at a first location along the few mode optical fiber, separating, from the few mode optical fiber, a collection of backscattered Stokes Raman signals and Anti-Stokes Raman signals based on a temperature of the few mode optical fiber at a second location along the few mode optical fiber, detecting the separated Rayleigh signals and Raman signals, determining, based on detecting the collection of backscattered Rayleigh traces, at least one of the first location, the vibration frequency, and an amplitude of the vibration, and determining, based on the detecting the collection of backscattered Raman signals, the temperature at the second location.