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Well‐based Monitoring Using Distributed Fiber‐Optic Sensing – Integrated Monitoring of Deep Earth Processes
Author(s) -
Freifeld Barry
Publication year - 2019
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.14023
Subject(s) - citation , computer science , session (web analytics) , library science , beijing , telecommunications , operations research , world wide web , history , archaeology , engineering , china
Fiber-optic sensing dates back more than 50 years, to the first non-contact vibration monitoring sensor based on bifurcated fiber bundles (US Patent 03327584 granted June 27, 1967). While various point sensing technologies are available, such as those based on Fiber Bragg Gratings and Fabry-Perot cells, distributed sensing has been transformational to earth science research because measurands exist along the entire length of an optical fiber with high spatial and temporal resolution. The common element in all distributed fiber-optic sensing technologies is that they rely upon launching light down an optical fiber and then based on either a measured signal back propagated through a reflection or forward propagated through transmission, the launched light is altered and through that change an environmental parameter influencing the optical properties is estimated. Given the expense and difficulty in drilling deep boreholes, distributed fiber-optic measurements can maximize the information available from well-based monitoring systems.