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US 2014/0208855 A1Published application
Distributed Acoustic Sensing with Multimode Fiber
AssigneeHalliburton Energy Services, Inc.
InventorNeal Gregory Skinner
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Abstract
A method and system for distributed acoustic sensing using multimode optical fibers.
Claims9
A method for distributed acoustic sensing using multimode optical fibers comprising the steps of:
- a. injecting light energy into a multimode optical sensor fiber deployed into a region of interest from a light source;
- b. collecting backscattered Rayleigh light from the multimode optical sensor fiber and directing it via a return multimode optical fiber into a detector enclosure;
- c. terminating the return multimode optical fiber inside the detector enclosure and allowing the light leaving the terminal end of the return multimode optical fiber to spread before it strikes at least one light detector in the detector enclosure;
- d. acquiring and amplifying the signals from the at least one light detector;
- and
- e. performing distributed acoustic analysis on the acquired and amplified signals.
3 more elements
A system for distributed acoustic sensing using multimode optical fibers comprising:
- a. a distributed multimode optical fiber deployed into a region of interest;
- b. a light source for providing a backscattered Rayleigh light from the distributed multimode optical fiber;
- c. a beam splitter or coupler for redirecting the backscattered light to a multimode return fiber terminating inside a detector enclosure;
- d. at least one detector in the detector enclosure situated at a predetermined distance from the terminal end of the multimode return fiber.
1 more element
Dependencies are inferred from the claim text.